Y1. Herbicide persistence into the next growing season restricts
rotational crops. The following information explains herbicide
degradation for chemistries known to carryover.
General Rules For Herbicide Breakdown
- Many herbicides are broken down in soil by microbial
decomposition. In addition, SUs and triazines are broken
down by chemical reactions like acid hydrolysis.
- Herbicide molecules must be free from binding to soil
particles or organic matter for soil microorganisms to degrade.
- Most herbicide molecules are more tightly adsorbed to soil
particles in dry soils than moist soils.
- Chemical degradation of herbicides in soil is affected by soil
pH. Acid hydrolysis nearly ceases at soil pH above 6.8.
Effect of pH on Herbicide Activity and Persistence
Negative charges on soil particles and organic matter adsorb
positive-charged compounds or substances. Soil pH influences
adsorption and availability of the following herbicides by
determining the electrical charge of the herbicide molecules:
Imidazolinones, SUs, Triazines, and Triazolopyrimidines (TPS).Molecules become (-) charged when a proton is removed or
become (+) charged when a proton is added. Most herbicides
become positively charged in acid (H+) pH conditions. Positively
charged herbicide molecules are adsorbed to soil particles due
to the attraction between (-) charges on soil particles and (+)
charges on the herbicide molecule.Y2.
Breakdown of Imidazolinone (Imi) Herbicides and
TPS
Herbicides.
In general, breakdown occurs by soil microbes and breakdown
occurs more rapidly and herbicide activity increases as soil
pH increases. Rate of breakdown decreases in dry conditions.
Imi and TPS herbicides are:
1. Broken down by microbes - not broken down by hydrolysis.
2. Not degraded in anaerobic (waterlogged soil) conditions.
3. Not volatile nor photodegraded by sunlight.
4. Not leached beyond 12 inches.
5. Weakly bound to soil but strongly bound to OM.
6. Adsorbed more strongly as soil dries and through time.
For Imi herbicides applied in dry conditions, herbicide molecules
adsorb to OM. The next spring, winter moisture can displace
herbicide molecules from soil and OM allowing the molecules to
become free for plant uptake and microbial breakdown. For
sensitive crops like sugarbeet, the adsorption and desorption
process may occur over several years causing crop injury from
herbicide residues that become available after moisture events.
7. Negatively (-) charged, not adsorbed, and free for plant uptake
and microbial degradation at soil pH >6.5 for Imi herbicides and
pH >7 for TPS herbicides.
8. Strongly bound to OM at pH <6.5 for Imi herbicides and pH <7
for TPS herbicides.
For Imi herbicides: Amount adsorbed
changes little from 6.5 to 8. At soil pH <6.5, pH reduction as
small as 0.2 pH units can DOUBLE the amount adsorbed.
Large variation in pH can exist in the same field. In low pH,
residues of Imi herbicides can injure sensitive plants for many
years.In summary, activity and degradation of Imi and TPS herbicides
increase as soil pH increases. Herbicide adsorption increases as
OM matter increases and as soil pH decreases. All factors
increasing microbial activity also increase herbicide degradation
(warm, moist soils). Degradation increases in soils with pH
above 6.5 (Imi) or 7 (TPS) because herbicide molecules are not
adsorbed and are free in soil solution for plant uptake and
microbial breakdown.
Y3.
Breakdown of SU Herbicides (with exceptions):
In general, most SU herbicides are broken down by acid hydrolysis
and can leave a residue in soil for more than one year. The chemical
reaction ceases at soil pH above 6.8.
Exceptions:
Thifensulfuron, tribenuron, foramsulfuron (Option), and
triflusulfuron (UpBeet) are rapidly broken down by soil mirobes.
Halosulfuron (Pemit), and rimsulfuron are broken down faster by
hydrolysis as pH moves above and below pH of 7.0. Herbicide
breakdown is slowest in neutral soil pH of 7.0.
Most SU herbicides are:
1. Not leached, nor volatile, nor broken down by photodegradation.
2. Affected by pH. Water solubility increases as pH increases.
3. Broken down primarily by acid hydrolysis. Microbial degradation is
very slow.
4. Non-microbial hydrolysis for most residual SU herbicides ceases at
soil pH above 6.8.
5. SU herbicides are undissociated (neutral charge) at pH less than
7.0 and are adsorbed to soil and OM. As soil pH increases above 7.0
molecules are (-) charged, are in a free form, do not bind with (-)
charged soil particles, and are are available for plant uptake.
Even at low pH ranges, SU herbicides are so biologically active
at low concentrations that plant response may still occur.
SU herbicides carryover more in high pH soils (above 6.8) because
acid hydrolysis ceases above that level. Hydrolysis is minimally
affected by soil moisture, organic matter, soil texture, soil microbes,
and soil compaction or aeration. Hydrolysis is affected by soil
temperature and soil pH. As temperature increases and pH
decreases below 6.8, hydrolysis increases.
Y4.
Breakdown of Triazine Herbicides
Triazines are degraded by hydrolysis similar to SU herbicides.
Therefore, the same factors affecting SU breakdown also affect
breakdown of triazine herbicides - See Y3. Some slight differences
are noted below. Triazine herbicides are:
1. More active in high pH soils.
2. Broken down by photodegradation only when herbicide remains
on soil surface for extended periods..
Triazine molecules are (+) charged at soil pH < 7.5. Positive charged
triazine molecules bind to (-) charges on soil and OM making them
unavailable for plant uptake and microbial breakdown. This is why pH
sensitive herbicides like atrazine and Sencor can be used with less
risk of crop injury in low pH soils. However, as pH fluctuates across
the field, herbicide availability may be radically altered ranging from
complete crop safety and erratic weed control at low pH to crop injury
and adequate weed control at high pH.
At high soil pH, the opposite reaction occurs. At soil pH > 7.5, triazine
herbicide molecules donate protons (H+) resulting in (H + OH = H2O)
so the molecules have a net neutral charge, which do not bind to soil
particles and OM, and are free for plant uptake and microbial
decomposition.
Y5.
Persistence of phytotoxic levels of a herbicide for more than 1
year can be a problem with some herbicides. Herbicide residues are
most likely to occur following years with low rainfall because chemical
and microbial activity needed to degrade herbicides are limited in dry
soil. Crop damage from herbicide residues can be minimized by
applying the lowest herbicide rate required for good weed control, by
using band rather than broadcast applications, and by moldboard
plowing before planting the next crop. Moldboard plowing reduces
phytotoxicity of some herbicides by diluting the herbicide residue in a
large volume of soil. Moldboard plowing is effective in reducing the
residual effects of trifluralin, Sonalan, Prowl, Nortron SC, atrazine,
and Sencor.
Y6. Herbicide residues often can be detected by bioassay.
Representative soil samples of the whole field are obtained by
sampling many places to the depth of the tillage layer. A soil
sample free of herbicide residues can serve as the untreated
check. The samples should be dried and the clods broken so
that the largest particles are no larger than a wheat kernel.
Prepare two or more samples of untreated check soil and the
test soil in pots or other containers with holes in the bottom for
water drainage.
The crop to be grown in the field should be used as one
bioassay species. Alfalfa and canola also should be planted as
an additional bioassay species because of their relative
sensitivity to many residual herbicides. Plant seeds of
large-seeded crops like corn or soybean at 1 seed per 1 to 2
square inches, or seeds of small-seeded crops like cereals or
flax at about 1 seed/sq inch. Water as needed but do not
over-water. Thin plant stands when seedlings are 2 to 3 inches
tall to allow sufficient space for adequate growth. Position containers in direct sunlight and maintain temperature at 70 to 75 F.
Observe the plants 2 to 3 weeks after emergence. Record visible
and physical measurements such as plant height and leaf length
for abnormalities.
Symptoms of some herbicides, like atrazine and Sencor, do not
develop until 2 to 3 weeks after emergence so do not evaluate
the treatment effect too soon after emergence. Plants grown in
root inhibiting herbicides, such as dinitroanilines, should be
washed to observe root growth. Window bioassay does not
provide accurate information for ALS herbicide carryover.
Field Bioassay Instructions: Plant several strips of desired
crops across the field perpendicular to the direction the suspect
herbicide was applied. Strips should be spaced to represent
different field conditions (texture, pH, and drainage). If no visible
signs of injury, stand reduction, or yield reduction occur, then the
field can be seeded with the desired crop the next growing
season. Do not plant if injury occurs and the bioassay must be
repeated the next growing season to determine the safety of the
crop to existing residues.
Y7. Atrazine at rates over 0.38 lb ai/A generally has residue the
year following application to corn in North Dakota. If soil moisture
is deficient, atrazine may cause injury to susceptible crops the
following year. Corn and millet are tolerant to atrazine while other
crops vary in susceptibility. The approximate ranking of crops
from most to least tolerant is corn, sorghum, millet, flax,
soybean, barley, wheat, oat, sunflower, canola/mustard, alfalfa,
and sugarbeet.
Y8. Balance Pro (isoxaflutole) at 1.5 to 3 fl oz/A may have a
residue the following year. Breakdown is primarily by microbial
activity. Risk of Balance Pro carryover increases as precipitation
occurring during the growing season decreases. Balance Pro
becomes more active as soil texture becomes more coarse and
organic matter decreases. Rotation restrictions are found in the
table at the end of this section.
Y9. Callisto (mesotrione) at 3 fl oz/A may have a residue the
following year. Risk of Callisto carryover increases as organic
matter increases and soil pH decreases. Callisto is degraded by
soil microbes. Factors affecting Callisto breakdown are similar to
Imi herbicides. See paragraph Y2 for additional information.
Rotation restrictions for Callisto are found in the table at the end
of this section.
Y10. Celebrity Plus (nicosulfuron & dicamba & diflufenzopyr) at
6.67 oz WDG/A may have a residue the following year from
nicosulfuron but not dicamba. Refer to paragraphs on Accent
and dicamba for additional information.
Y11. Dicamba at rates greater than 1.5 pt/A may remain as a residue
in soil. Most grass and broadleaf crops can be planted 4 months or
more after application at 1.5 pt/A. Allow 45 days/pt/A of dicamba,
excluding days when ground is frozen to rotate to any crop. NDSU research indicates dicamba at 1 qt/A applied in late September caused
visible injury to wheat and barley planted the following spring, but
effect on yield was minimal. Dicamba at 1 pt/A applied the previous
fall prevented seed production in sunflower. The approximate ranking
of crops from most to least tolerant is corn, barley, wheat, oat, potato,
buckwheat, soybean, dry edible bean, sunflower, flax, and sugarbeet.
Rotational crop restrictions for dicamba are found in the table at the
end of this section.
Y12. Flexstar/Reflex (fomesafen) at 0.75 to 1 pt/A may have a
residue the year following application to soybean or dry bean. Most
crops can be planted the next growing season except canola,
crambe, flax, potato, safflower, sugarbeet, and sunflower. Fomesafen
is weakly adsorbed by OM but mobility and amount available for plant
uptake increases as soil pH increases above 6.5. Degradation is
through soil microbes and under anaerobic conditions. Conditions
that inhibit microbial activity also reduce fomesafen breakdown. Cold
or dry conditions after application reduce rate of breakdown. Northern
production areas, like ND, have a shorter growing season and the
soil temperature is colder for longer periods of time, which limits
breakdown. Late applications in beans decreases the amount of time
that breakdown can occur.
Ways to reduce potential for fomesafen carryover include lower
application rates, banded herbicide applications, and tillage to dilute
herbicide residues. The approximate ranking of non-labeled crops
from most to least tolerant is cereals, potato, oil-seed rape/canola,
field corn, sunflower, sugarbeet, sorghum, and alfalfa. Rotational
crop restrictions for Flexstar/Reflex are found in the table at the end
of this section.
Y13. Hornet
(flumetsulam & clopyralid-K salt) at 2 to 6 oz WDG/A
contain is 1 to 3 oz ai/A clopyralid. Clopyralid is labeled for use in
corn at 1.5 to 4 oz ai/A. Therefore, precautions in crop rotation would
apply as if clopyralid was applied alone at 1 to 3 oz ai/A. Rotational
crop restrictions for Hornet are found in the table at the end of this
section. Consult the clopyralid labels and paragraph in this section for
residue information.
Y14.
Nortron SC (ethofumesate) often has a residue the year following use on sugarbeet. The approximate ranking of crops from most to
least tolerant is sunflower, dry beans, soybean, corn, barley, and
wheat. Moldboard plowing usually will eliminate crop injury. Nortron
should be applied in a band to reduce cost and reduce potential crop
injury from residues the following year.
Y15. Paramount (quinclorac) at 0.17 to 0.33 lb WDG/A may
carryover in soil for more than 1 year. Seeding of flax, chick pea, dry
pea, and sugarbeet must be delayed until at least 24 months after
application. Rotational crop restrictions for Paramount are found in
the table at the end of this section.
Y16. Peak (prosulfuron) at 0.25 to 0.5 oz 57DF/A may carryover in
soil for more than 3 crop years. Peak is safe on corn safety which is
different as compared to other SU herbicides labeled in small grains.
Peak is labeled on corn through the prepackaged mixture Exceed.
Y17. Metribuzin may not have residue the following year at 0.25 lb
ai/A, but rates over 0.5 lb ai/A may damage susceptible crops the
next year. Rotational crop restrictions for metribuzin are found in the
table at the end of this section. The approximate ranking of crops
from most to least tolerant is potato, soybean, dry edible bean, corn,
barley, wheat, oat, sunflower, flax, and sugarbeet.
Y18. Sonalan (ethalfluralin),
Prowl/Prowl H20 (pendimethalin),
and trifluralin are similar herbicides called dinitroanilines. Under
dry soil conditions these herbicides can persist in soil for more
than 1 year. Sonalan has less soil residue than trifluralin and
Prowl. Land treated with Sonalan in the spring may be planted to
any crop the next year except sugarbeet. Sunflower, soybean,
potato, and dry edible bean are quite tolerant of dinitroaniline
herbicides. Rotational crop restrictions for Prowl, Sonalan, and
trifluralin are found in the table at the end of this section. The
approximate ranking of other crops from most to least tolerant is
soybean, flax, alfalfa, barley, wheat, corn, oat, and sugarbeet.
Y19. Spartan (sulfentrazone) residue may remain in soil the
following season. Most grass and broadleaf crops can be planted
the following year except canola, crambe, lentil, and sugarbeet.
Sulfentrazone is degraded by soil microbes, is not affected by
sunlight, and is not volatile. Sulfentrazone applied PRE does not
degrade on the soil surface. Precipitation activates the herbicide
by moving it into the soil. Sulfentrazone solubility increases as
soil pH increases above 6.5, as soil texture changes from fine to
coarse, and as OM decreases. As sulfentrazone solubility
increases availability for plant uptake increases, weed control
increases, and risk of crop injury increases. The approximate
ranking of crops from most to least tolerant is soybean, flax,
chickpea, mint, sunflower, potato, field pea, dry edible beans,
safflower, crambe, canola, lentil, and sugarbeet. Rotational crop
restrictions are found in the table at the end of this section.
Y20.
Clopyralid, including premixes may have a residue in soil
following POST application. Pea, lentil, potato, and broadleaf
crops grown for seed can be planted 18 months after clopyralid
(including premixes) application. Potential for injury from soil
residue of clopyralid can be reduced by burning, removal, or
incorporation of treated crop residues.
Y21. Tordon (picloram) at rates of 1 fl oz/A or higher may
carryover in soil for more than 1 crop year. Only grass or grain
crops, such as grass, small grains, or flax, can be planted the
year following application. Sunflower, soybean, dry edible bean,
and potato are especially susceptible to Tordon.
Y22. Susceptibility of certain crops from most to least tolerant:
Chlorimuron: soybean, wheat, oat, corn, sorghum, sunflower, alfalfa,
canola.
Clomazone: soybean, corn = sorghum = sunflower, alfalfa, wheat.
Imazaquin: soybean, wheat, oat, sorghum, sunflower, corn, alfalfa,
canola.
Imazethapyr: soybean, alfalfa, corn, wheat, oat, sunflower, sorghum,
canola.
See Y7 - Atrazine and Y18 - Trifluralin for crop sensitivity.
General guidelines for laboratory analysis: Safe level*
| Herbicide |
Parts per
billion (ppb) |
Parts per million
(ppm) |
Crop |
| Chlorimuron |
1-2
2-5 |
0.001-0.002
0.002-0.005 |
Corn
Wheat |
| Clomazone |
50-200
15-100 |
0.05-0.2
0.015-0.1 |
Corn
Wheat/Alfalfa |
| Dintroaniline |
100-200
200-300
50-100 |
0.1-0.2
0.2-0.3
0.05-0.1 |
Corn
Wheat
Sugarbeet |
| Imazaquin |
2-10
10-30 |
0.002-0.01
0.01-0.03 |
Corn
Wheat |
| Imazethapyr |
1-30
4-15 |
0.01-0.03
0.004-0.015 |
Corn
Sorghum |
| Triazine |
150-250
40-100
60-150
75-180
25-50 |
0.15-0.25
0.04-0.1
0.06-0.15
0.075-0.18
0.025-0.05 |
Soybean
Alfalfa
Oat
Wheat
Sugarbeet |
*"Safe" values for herbicide residues differ according to soil type
and pH because of differences in availability from soil. Low-range
value are for coarse textured soils with low levels of organic
matter, higher values are for fine textured soils with high organic
matter.
1 ppm = 1,000 ppb |
| "Safe" Triazine Residue Level |
|
| 3 inch sample
(No-till) |
6 inch sample
(moldboard plow) |
Crop |
<0.17 ppm
0.17 to 0.35 ppm
>0.35 ppm |
<0.08 ppm
0.08 to 0.17 ppm
>0.17 ppm |
Oat, alfalfa
Soybean
Corn |
| Y23. Laboratories That Analyze For Pesticide Residue in
soil, water, and plant samples. |
For links to labs in each state see AGLABS website:
http://aglabs.sdstate.org
For specific category testing of labs see:
http://www.findtesting.com
The following list shows laboratories that can analyze for
pesticide residues.
|
A & L Great Lakes Lab
3505 Conestoga Drive, Fort Wayne, IN 46808
(219) 483-4759, http://www.algreatlakes.com |
Agvise Laboratories
Northwood, ND
(701) 587-6010, johntlee@polarcomm.com |
Analytical Laboratory
McCall Hall, PO Box 173620
Montana State University, Bozeman, MT 59717
406 994-3383, Heidi Hickes
Developed the most sensitive test available for Oust. |
Animal Disease Lab,
9732 Shattuc Road, Centralia, IL 62801-5858
(618) 532-6701,
http://agr.state.il.us/animalHW/labs/centralialab.html |
APT Labs Inc.
1050 Spring Str., Wyomissing, PA 19610
610 375-3888 |
Harris Laboratories
621 Rose Street, P.O. Box 80837, Lincoln, NE 68501
(402) 476-2811, http://www.mdsharris.com |
Hazelton Environmental Services
525 Science Drive, Madison, WI 53711
(608) 232-3300 |
Midwest Laboratories
13611 B Street, Omaha, NE 68144
(402) 334-7770, http://www.midwestlabs.com |
Minnesota Valley Testing Laboratories, Inc.,
326 Center Street, New Ulm, MN 56073
(507) 354-8517, (800) 782-3557 |
Minnesota Valley Testing Laboratories, Inc.,
1411 South 12th Street, Bismarck, ND 58504
(701) 258-9720, (800) 782-3557 |
Olson Biochem Labs, Duane Matthees
PO Box 2170
152 ASC, Brookings, SD 57007-1217
(605) 688-6171, Fax (605) 688-6295,
http://anserv.sdstate.edu |
Professional Service Industries
4820 West 15th Street, Lawrence, KS 66049
(800) 548-7901 |
Publications on herbicide injury symptoms:
W-1141 Herbicide and Nonherbicide Injury Symptoms on Spring
Wheat and Barley, NDSU Extension Service.
A-1085 Herbicide Mode of Action and Sugarbeet Injury Symptoms,
NDSU Extension Service
PNW-498 Herbicide Drift and Carryover Injury in Potatoes
Ag Publications, U of ID, 208 885-7982, ckink@uidaho.edu
CD-ROM:
Herbicide Mode of Action and Crop Injury Symptoms (U of MN)
To order go to: http://shop.extension.umn.edu/
In the "Search " window type: 06893
Cost is $20.00 per CD-ROM
Web sites:
Herbicide Mode of Action Symptoms (U of WI):
http://ipcm.wisc.edu/pubs/PestMngmt_ref.htm
Herbicide Injury Diagnostic Key:
http://ipcm.wisc.edu/uw_weeds/herbinjkey/
Dicamba Injury to Soybean (U of WI):
http://ipcm.wisc.edu/pubs/PestMngmt_ref.htm
Recognizing Residue and Drift Injury in Canola -
Alberta Res. Council:
www.canola-council.org.PDF/toolbook.pdf#zoom=100
|
Y24. Crop Rotation Restrictions for North Dakota |
|
Herbicide |
Alfalfa |
Barley |
Canola |
Corn |
Crambe |
CRP
grass |
Dry
bean |
Field
pea |
Flax |
Oat |
Edible
Legume.* |
Potato |
Saf-
flowr |
Soybean |
Sugar-
beet |
Sun-
flower |
HRS/
Durum |
| |
------------------------ (months after application) -------------------------- |
| DO NOT USE IN ND = Beacon, chlorimuron, Exceed, Scepter, Spirit, Steel |
| Accent (<0.68 oz DF/A)
|
10j |
8 |
18 |
0 |
18 |
18 |
10j |
10j |
18 |
8 |
10 |
18j |
18 |
0.5 |
18a |
10j |
8 |
| acetochlor |
9 |
NCS |
NCS |
0 |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
4 |
| Ally Extra (0.2 oz) e |
22 |
10 |
22 |
22 |
22 |
6 |
22 |
22 |
22 |
10 |
22 |
22 |
22 |
22 |
22b |
22 |
1/10 |
| Amber |
4b |
18c |
B |
22b |
B |
B |
B |
B |
B |
18c |
B |
B |
B |
36b |
B |
24b |
0 |
| Assert |
15 |
NCS |
12/15f |
NCS |
12/15 |
4 |
NCS |
15 |
15 |
15 |
15 |
15 |
NCS |
NCS |
20 |
NCS |
NCS |
| atrazine (0.38 lb ai) |
NCS |
NCS |
NCS |
0 |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
12 |
NCSb |
NCS |
NCS |
| atrazine (0.38-0.5 lb ai) |
2CS |
NCS |
2CS |
0 |
2CS |
2CS |
2CS |
2CS |
NCS |
2CS |
2CS |
NCS |
2CS |
12 |
2CSb |
2CS |
2CS |
| atrazine (0.5-1 lb ai) |
2CS |
2CS |
2CS |
0 |
2CS |
2CS |
2CS |
2CS |
2CS |
2CS |
2CS |
2CS |
2CS |
12 |
2CSb |
2CS |
2CS |
| Authority Assist |
12 |
9.5 |
40b |
10 |
40b |
12 |
4 |
4 |
26 |
18 |
4/12* |
26 |
18 |
0 |
40b |
18 |
4 |
| Authority First/Sonic |
12 |
12 |
24 |
18 |
30b |
30b |
12 |
12 |
30b |
12 |
12 |
18 |
30b |
0 |
30b |
30b |
4 |
| Authority MTZ |
12 |
4 |
24 |
10 |
18 |
12 |
12 |
18 |
18 |
18 |
18 |
12 |
18 |
4 |
36 |
12 |
4 |
| Balance Pro (j) |
10 |
6 |
18 |
0 |
18 |
18 |
18 |
18 |
18 |
6 |
18 |
6 |
6 |
6 |
18 |
10 |
6 |
| Basis |
10 |
8 |
18 |
0 |
18 |
18 |
8 |
8 |
18 |
8 |
18 |
0 |
18 |
0.5 |
10 |
10 |
8 |
| Beacon (r) |
8 |
8 |
18 |
0.5 |
18 |
18 |
8 |
8 |
18 |
8 |
8 |
2CS |
18 |
8 |
B |
8 |
8 |
| Beyond/ClearMax |
9 |
18t |
18 |
8.5 |
18 |
9 |
9 |
9 |
18 |
9 |
9 |
18t |
18 |
0 |
18t |
9 |
3 |
| Callisto |
10 |
4 |
NCS |
0 |
18 |
18 |
18 |
18 |
10 |
4 |
18 |
10 |
18 |
10 |
18 |
10 |
4 |
| Camix |
18 |
4.5 |
18 |
0 |
18 |
18 |
18 |
18 |
18 |
NCS |
18 |
NCS |
18 |
NCS |
18 |
18 |
NCS |
| Celebrity Plus |
12 |
8 |
18 |
0.25 |
18 |
18 |
10 |
10 |
18 |
8 |
10 |
18a |
18 |
4 |
18a |
10/18a |
8 |
| clopyralid |
10.5 |
0 |
0 |
0 |
0 |
0 |
10.5m |
18 |
0 |
0 |
18 |
18 |
10.5m |
10.5m |
0 |
10.5m |
0 |
| clopyralid&2,4-D/MCPA |
10.5m |
1 |
5 |
1 |
5 |
1 |
10.5m |
18 |
5 |
1 |
18 |
18 |
10.5m |
10.5m |
5 |
10.5m |
1 |
| dicamba (<1.5 pt) h |
4 |
4h |
4 |
0h |
4h |
4 |
4 |
4 |
4 |
4h |
4 |
4 |
4 |
4 |
4 |
4 |
0h |
| Everest |
NCS |
9 |
9 |
NCS |
NCS |
NCS |
9 |
11 |
9 |
18 |
24 |
9 |
9 |
9 |
9 |
9 |
0/4 |
| Extreme |
4 |
9.5 |
40b |
8.5 |
40b |
4 |
4 |
4 |
26 |
18 |
4 |
26 |
18 |
0 |
40b |
18 |
4 |
| Far-Go |
NCS |
0 |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
18 |
NCS |
NCS |
NCS |
NCS |
NCS |
NCS |
0 |
| Glean/Finesse |
B |
16 |
B |
B |
B |
4 |
B |
B |
B |
10 |
B |
B |
B |
B |
B |
B |
0 |
| FirstRate |
9 |
30b |
30b |
9 |
B |
9 |
9 |
9 |
30b |
9 |
9 |
18 |
B |
0 |
30b |
30b |
3 |
| Flexstar
|
18 |
4 |
18 |
10 |
18 |
4 |
10 |
10 |
18 |
4 |
10 |
18 |
18 |
0 |
18 |
18 |
4 |
| Gangster |
12 |
B |
B |
9 |
B |
9 |
9 |
B |
9 |
9 |
9 |
18 |
B |
0 |
30b |
30b |
3 |
| Halex GT |
10 |
4 |
10 |
0 |
18 |
18 |
18 |
18 |
10 |
18 |
18 |
10 |
18 |
10 |
18 |
10 |
4 |
| Hornet |
10.5m |
4 |
26b |
0 |
B |
12 |
10.5m |
10.5m |
26b |
4 |
10.5m |
18 |
B |
10.5m |
26b |
18 |
4 |
| Impact |
9 |
3 |
18 |
0 |
18 |
18 |
18 |
9 |
18 |
3 |
18 |
9 |
18 |
18 |
18 |
9 |
3 |
| Laudis |
10 |
4 |
10 |
0 |
18 |
18 |
18 |
10 |
18 |
4 |
18 |
10 |
18 |
8 |
18 |
18 |
4 |
| Lightning |
9.5 |
9.5 |
40b |
8.5 |
40b |
40 |
9.5 |
9.5 |
40b |
18 |
9.5 |
26 |
18 |
9.5 |
40b |
18b |
4 |
| Lumax (<3 pt/A) |
18 |
4.5 |
18 |
0 |
18 |
18 |
18 |
18 |
18 |
NCS |
18 |
18 |
18 |
NCS |
18 |
18 |
NCS |
| Matrix |
12 |
9/18p |
18 |
0 |
18 |
18 |
10 |
18 |
18 |
9 |
18 |
0 |
18 |
4 |
18 |
10 |
9 |
| Maverick |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
0 |
| metribuzin (u) |
4 |
8u |
12 |
4 |
12 |
4 |
12 |
8 |
12 |
12 |
8 |
4 |
12 |
4 |
18 |
12 |
8u |
| metsulfuron (c) |
34d |
10 |
34d |
34e |
34d |
6 |
34e |
34d |
34e |
10 |
34d |
34d |
34e |
34d |
34d |
34e |
1/10 |
| Milestone (b) |
36b |
B |
24b |
12b |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
B |
| Olympus |
B |
18k |
22k |
B |
B |
B |
B |
12k |
B |
B |
22k |
B |
B |
B |
B |
18k |
0 |
| Option |
Corn is 7 days, soybean is 14 days, and all other crops are 60 days. |
| Paramount |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
24 |
24 |
10 |
24 |
10 |
10 |
10 |
24 |
10 |
0 |
| Peak (r) |
22 |
0 |
22 |
1 |
22 |
10 |
22 |
10 |
22 |
0 |
10 |
22r |
22 |
22 |
22r |
22 |
0 |
| Permit/Sandea |
9 |
2 |
15 |
1 |
B |
2 |
9 |
9 |
B |
2 |
9 |
9 |
B |
9 |
36 |
18 |
2 |
| Plateau |
36 |
24 |
48b |
36 |
36 |
0 |
36 |
36 |
36 |
24 |
36 |
48b |
36 |
18 |
48b |
36 |
12 |
Herbicide |
Alfalfa |
Barley |
Canola |
Corn |
Crambe |
CRP
grass |
Dry
bean |
Field
pea |
Flax |
Oat |
Edible
Legume* |
Potato |
Saf-
flowr |
Soybean |
Sugar-
beet |
Sun-
flower |
HRS/
Durum |
| |
-------------------------- (months after application) ------------------------------ |
| Prowl/H2O |
NCS |
NCS |
NCS |
0s |
NCS |
NCS |
0 |
0 |
NCS |
NCS |
0 |
0 |
NCS |
0 |
2CS |
0 |
NCS |
| Pursuit |
4 |
9.5 |
40b |
8.5 |
40b |
4 |
4 |
4 |
26 |
18 |
4 |
26 |
18 |
0 |
40b |
18 |
4 |
| Pursuit Plus |
9.5 |
9.5 |
40b |
8.5 |
40b |
NCS |
4 |
4 |
26 |
18 |
4 |
26 |
18 |
0 |
40b |
18 |
4 |
| Python |
4 |
4 |
26b |
0 |
26b |
12 |
4 |
4 |
26b |
4 |
4 |
12 |
26b |
0 |
26b |
18 |
4 |
| Radius |
12 |
12 |
18 |
0 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
6 |
18 |
6 |
18 |
18 |
12 |
| Raptor |
9 |
18t |
18 |
8.5 |
18 |
9 |
9 |
9 |
18 |
9 |
9 |
18t |
18 |
0 |
18t |
9 |
3 |
| Rave |
B |
18c |
B |
22 |
B |
B |
B |
B |
B |
18c |
B |
B |
B |
36b |
B |
24b |
0 |
| Reflex
|
18 |
4 |
18 |
10 |
18 |
4 |
10 |
10 |
18 |
4 |
10 |
18 |
18 |
0 |
18 |
18 |
4 |
| Resolve (<1.1 oz DF/A) |
10j |
9 |
10j |
0 |
18 |
18 |
10 |
18 |
18 |
9 |
18 |
0 |
18 |
10 |
10j |
10 |
9 |
| Rimfire |
10 |
10 |
10 |
12 |
12 |
12 |
10 |
10 |
10 |
10 |
10 |
12 |
10 |
10 |
12 |
10 |
0 |
| Silverado |
10 |
1 |
10 |
12 |
10 |
10 |
3 |
3 |
10 |
10 |
10 |
10 |
10 |
3 |
10 |
1 |
0.25 |
| Sonalan |
NCS |
NCS |
0 |
NCS |
0 |
13w |
0 |
0 |
NCS |
NCS |
0 |
NCS |
NCS |
0 |
2CS |
0 |
NCS |
| Spartan/Advance |
12 |
4 |
24 |
10 |
24 |
12 |
0 |
0 |
10 |
12 |
0/12* |
12 |
10 |
0 |
36 |
0 |
4 |
| Status/Distinct (h) |
1 |
1 |
1 |
1h |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
| Steadfast (<0.76 oz/A) |
10j |
8 |
18 |
0 |
18 |
18 |
10j |
10j |
18 |
8 |
10j |
18j |
18 |
0.5 |
18a |
10j |
8 |
| Stout (<0.76 oz DF/A)
|
10j |
8 |
18 |
0 |
18 |
18 |
10j |
10j |
18 |
8 |
10 |
10j |
18 |
0.5 |
18a |
10j |
8 |
| SureStart |
18 |
NCS |
26b |
0 |
26b |
26b |
18 |
NCS |
26b |
NCS |
NCS |
18 |
26b |
NCS |
26b |
18 |
4 |
| Tordon (1.5 oz) |
2CS |
NCS |
2CS |
2CSx |
2CS |
1 |
2CS |
2CS |
NCS |
NCS |
2CS |
2CS |
2CS |
2CS |
2CS |
2CS |
NCS |
| trifluralin (y) |
0 |
NCS |
0 |
NCS |
0 |
18/21 |
0 |
0 |
0 |
18 |
0 |
0 |
0 |
0 |
2CS |
0 |
NCS |
| Valor/Chateau |
8b |
4 |
8b |
1 |
8b |
8b |
4 |
4 |
8b |
8b |
4 |
8b |
8b |
0 |
8b |
1 |
1 |
| WideMatch |
10.5 |
0 |
4 |
0 |
4 |
0 |
10.5 |
10.5z |
4 |
0 |
18 |
18 |
10.5 |
10.5 |
0 |
10.5 |
0 |
*Edible legumes = chickpea (garbanzo bean) and lentils.
NCS = Next cropping season after herbicide application.
2CS = Second cropping season after herbicide application.
MAA = months after application.
|
Field Bioassay Instructions - Refer to label or paragraph Y7 in the Narrative Section. |
a Soil pH <7.5 = 10 MAA for sorghum and 11 MAA for sunflower.
Soil pH >7.5 = 18 MAA for sorghum and sunflower
Soil pH <6.5 = 10 MAA for sugarbeet and all other crops not listed.
Soil pH >6.5 = 18 MAA for sugarbeet, potato, and all other crops not listed and cumulative precipitation in the 18 MAA period must
exceed 28 inches.
B or b = Bioassay. Do not plant until field bioassay indicates it is safe. Crop rotation after atrazine is rate and soil pH dependant.
Python and Hornet require a 26 month rotation and a successful field bioassay.
FirstRate requires a 30 month rotation and a successful field bioassay.
Lightning, Pursuit, and Pursuit Plus requires a 40 month rotation and a successful field bioassay.
c Do not use on soil with pH greater than 7.9. Barley and oat can be planted 6 months after Ally application west of highway 83.
d Requires soil pH of 7.9 or less and a 34 month minimum rotation interval and 28 inches of cumulative precipitation.
e Requires soil pH of 7.9 or less, 22 months and 22 inches of precipitation west of Hwy 1 or 34 months and 34 inches of precipitation
east of Hwy 1. These restrictions also apply to Ally Extra at rates greater than 0.2 oz DF/A.
f
Imi resistant canola varieties may be planted the season after application.
Conventional canola varieties may be planted the following season after application at 1 pt/A in ND counties of Cavalier, Pembina,
Ramsey, Rolette, Towner, and Walsh and MN counties of Kittson, Marshall, Pennington, Red Lake, and Roseau.
h Any rotational crop may be planted 120 days following application of dicamba at 1.5 pt/A or less, excluding days when ground is
frozen. For wheat, barley, oat, and grass seedings, allow 45 days per pint/A of dicamba after application before planting.
For all crops and for rates greater than 1.5 pt/A allow 45 days per 1 pt/A of dicamba used excluding days when ground is frozen.
j Requires 15 inches of cumulative precipitation during the growing season following application. An 18 month restriction applies to
Accent, Resolve, and Steadfast applied above rates indicated or if drought follows application. Refer to label for crop rotation
restrictions if rates greater than those indicated are used.
k Requires 24 inches of accumulated precipitation.
m Do not plant dry bean, dry pea, soybean or sunflower for 18 months on soil with less than 2% OM and rainfall less than 15 inches
during the 12 MAA OR may be planted 12 MAA if risk of injury is acceptable. Perform a field bioassay prior to planting for areas that
receive less than 15 inches of rainfall and have less than 2% OM. Do not plant lentil, potato or any other broadleaf crop grown for seed
for 18 months unless risk of injury is acceptable.
p Barley can be planted 9 months after application in Cass, Grand Forks, Pembina, Towner, Traill, and Walsh counties of ND.
In all other counties of ND allow an 18 month rotation restriction before planting barley.
r Do not apply Beacon, NorthStar, Peak, or Spirit in the Red River Valley of ND and MN or on soil with pH greater than 7.8.
User must follow crop rotation restrictions as given on labels. Refer to label for additional information on soil pH, rotation intervals,
maximum use rates, application timing and other restrictions. The number of months after application given in the previous table are
applicable only on soil with a pH less than 7.8, only using less than maximum rates allowed, only using approved application timings,
and only on approved locations (inside or outside Red River Valley) as indicated on the label.
Do not replant to any broadleaf crop if less than 10 inches of precipitation has occurred since Peak application.
For situations not covered on the label or in the previous table, conduct a soil bioassay to determine if Peak soil residue will allow
successful planting of desired rotational crop.
s Corn can be planted only if Prowl/Prowl H20 is applied PRE. DO NOT APPLY PPI.
t Rotation to barley is: 9 months east of Hwy 83 and 18 months west of Hwy 83.
Rotation to potato is: 9 months if soil pH is >6.2 and rainfall is >18 inches/year or
18 months if soil pH is <6.2 and rainfall is < 18 inches/year
Rotation to sugarbeet: 18 months if the soil pH is >6.2 or
26 months if soil pH is less than 6.2.
u Must add 2 months if soil pH is 7.5 or above. Wheat and barley can be planted 4 MAA following lentil or soybean.
w CRP grasses may be planted 13 MAA under the following conditions:
1. By label this is deemed as a non-standard rotation.
2. Dow assumes no liability for injury.
3. Fall is recommended as the best time to plant CRP grasses.
4. A field bioassay is recommended prior to planting CRP grasses.
x Do not plant corn or sorghum until soil samples analyzed for Tordon residue indicates no detectable levels present.
Restriction is based on non-legal herbicide residue that may be found in corn and sorghum and not on crop safety.
y Oats, sorghum, and annual or perennial grass crops may be planted at least 12 MAA in areas that received 20 inches or more of
precipitation during the growing season. CRP grasses may be planted 18 MAA if trifluralin is spring-applied or 21 MAA if fall-applied.
z For rotation to field pea in 10.5 months, precipitation must be greater than 7 inches during the 10.5 months following application and
greater than 5.5 inches of precipitation from June 1 to August 31 following application. Otherwise allow 18 months.
Z1. Restrictions on Grazing/Feeding/Haying of Crops Treated with Herbicides
| Herbicide |
Crop |
Time interval |
| DAA = days after application WAA = Weeks after appl. |
| Accent |
Corn |
30 DAA |
| Acetochlor |
Corn |
No restriction |
| Achieve |
Small grain |
30 DAA |
| Aim |
Corn, small grain |
No restriction |
| Amber |
CRP, small grain |
No restriction |
| Assert |
Sunflower, small grain |
Not allowed |
| Assure II |
Canola/mustards, chickpea,
dry bean, dry pea, lentil,
soybean, sugarbeet |
Not allowed |
| Atrazine |
Corn |
21 DAA |
| Authority Assist |
Soybean |
Not allowed |
| Authority First |
Soybean |
Not allowed |
| Authority MTZ |
Soybean |
Not allowed |
| Axial XL |
Barley
Wheat |
Not allowed
50 DAA |
| Balance Pro |
Corn |
No restriction |
| Basagran |
Corn
Dry edible bean, dry pea
Soybean |
12 DAA
No restriction
30 DAA |
| Basis |
Corn |
30 DAA |
| Beyond |
Clearfield canola, CF wheat
Clearfield sunflower |
No restriction
Not allowed |
| Bromoxynil |
Alfalfa
Corn, small grain
CRP, Grass establishment
Flax |
30 DAA
45 DAA
Not allowed
No restriction |
| Bromox&MCPA |
Small grain |
45 DAA |
| Callisto |
Corn |
45 DAA |
| Camix |
Corn |
45 DAA |
| Celebrity Plus |
Corn |
32 DAA |
| Chlorsulfuron |
Small grain |
No restriction |
| Chlor&Metslfrn |
Small grain |
No restriction |
| ClearMax |
Clearfield wheat |
7 DAA |
| Clethodim |
Alfalfa
Canola, chickpea, dry bean,
flax, potato, soybean,
sunflower, sugarbeet |
15 DAA
Not allowed |
| Clopyralid |
Canola/mustards, sugarbeet |
7 DAA |
| Clopyralid&
2,4-D/MCPA |
CRP, small grain - graze/feed
- hay |
7 DAA
Not allowed |
| Dicamba |
Corn
CRP - non-lactating animals
- lactating - see label
Small grain - non-lactating
- lactating - see label
- haying forage |
> milk stage
No restriction
< 70 DAA
No restriction
7 DAA
37 DAA |
| Discover |
Small grain |
30 DAA |
| Distinct |
Corn |
32 DAA |
| Eptam |
Alfalfa, sunflower |
No restriction |
| Everest |
Small grain |
60 DAA |
| Extreme |
RUR soybean |
Not allowed |
| Far-Go |
Chickpea, small grain
Field pea
Lentil |
Not allowed
120 DAA
No restriction |
| Finesse |
Small grain |
No restriction |
| FirstRate |
Soybean |
14 DAA |
| Flexstar |
Soybean |
Not allowed |
| Fusilade DX |
Soybean |
Not allowed |
| Fusion |
Soybean |
Not allowed |
| Gangster |
Soybean |
Not allowed |
| Glyphosate labels indicate that for all registered crops and
applications unless otherwise noted there is an 8 week after
application (WAA) restriction for grazing, feeding and haying. |
| Glyphosate |
Alfalfa - Preharvest
Spot - Monsanto
- Generics
Renovate - < 1.5 lb ae/A
- > 1.5 lb ae/A
Renovation - Generics
Alfalfa - Roundup Ready
Barley - Preharvest
Postharvest - Monsanto
- Generics
Canola
Canola - RR
Chickpea - Preharvest
Corn - Preharvest
Postharvest - Monsanto
- Generics
Corn RUR - Preharvest
Postharvest
Dry bean - Preharvest
Dry pea - Preharvest
Flax
Lentil
Potato - Preharvest
Soybean - Preharvest
Monsanto - < 22 fl oz/A
- > 22 fl oz/A
Generics - < 6 qt/A
Postharvest
Soybean - RR - Preharvest
Monsanto -
Generics -
Postharvest
Sugarbeet
Sunflower
Wheat - preharvest
Postharvest - Monsanto
- Generics |
1.5 DAA
3 DAA
14 DAA
3 DAA
Not allowed
8 WAA
5 DAA
After harvest
7 DAA
8 WAA
Not allowed
8 WAA
8 WAA
8 WAA
7 DAA
8 WAA
7 DAA
7 DAA
Not allowed
8 WAA
8 WAA
8 WAA
8 WAA
14 DAA
25 DAA
25 DAA
8 WAA
14 DAA
Not allowed
8 WAA
8 WAA
Not allowed
After harvest
7 DAA
8 WAA |
| Halex GT |
Corn |
45 DAA |
| Hornet |
Corn |
No restriction |
| Huskie |
Wheat, barley |
25 DAA |
| Impact |
Corn |
45 DAA |
| Laudis |
Corn |
45 DAA |
| Liberty |
Liberty Link canola or corn |
Not allowed |
| Lightning |
Clearfield corn |
45 DAA |
| Lumax |
Corn |
45 DAA |
| Maverick |
Small grain - Feed, graze
- Hay |
No restriction
30 DAA |
| MCPA |
CRP, small grain - hay
- graze dairy animal
- graze meat animal
Flax, grass establishment |
30 DAA
7 DAA
7 DAA
7 DAA |
| Metolachlor |
Chickpea, soybean
Corn
Dry bean, field pea
Potato, safflower, sunflower |
No restriction
30 DAA
120 DAA
Not allowed |
| Metribuzin |
Field pea, lentil, soybean |
40 DAA |
| Metsulfuron |
CRP
Small grain |
No restriction
No restriction |
| Met & Chlorsfrn |
Small grain |
Not allowed |
| NorthStar |
Corn |
30 DAA |
| Olympus |
Small grain |
No restriction |
| Option |
Corn |
45 DAA |
| Outlook |
Corn
Soybean |
45 DAA
Not allowed |
| Paramount |
CRP
Small grain |
309 DAA
Not allowed |
| Paraquat
(PRE) |
Corn, dry bean, field pea
sunflower (desiccant),
small grain |
7 DAA |
| Peak |
Small grain |
30 DAA |
| Permit |
Corn |
30 DAA |
| Plateau |
CRP
Grass establishment |
No restriction
Not allowed |
| Poast |
Alfalfa
Canola, dry bean, dry pea,
flax, lentil, flax, potato,
sunflower sugarbeet
Soybean |
7 DAA
No restriction
Not allowed |
| Prowl |
Wheat
Corn
Soybean
Chickpea, dry bean, dry pea,
lentil, potato, sunflower |
28 DAA
21 DAA
No restriction
Not allowed |
| Puma |
Small grain |
No restriction |
| Pursuit |
Alfalfa
Chickpea, soybean
Dry edible bean
Field pea
Lentil |
30 DAA
Not allowed
7 DAA
120 DAA
No restriction |
| Pursuit Plus |
Soybean |
Not allowed |
| Python |
Corn
Soybean |
No restriction
Not allowed |
| Rage D-Tech |
Corn and grass forage
Small grains |
7 DAA
14 DAA |
| Raptor |
Alfalfa, dry bean, field pea,
soybean |
No restriction |
| Reflex |
Dry edible bean |
7 DAA |
| Rezult |
Soybean
Dry bean, dry pea |
Not allowed
No restriction |
| Rimfire |
Wheat |
30 DAA |
| Rimsulfuron |
Corn
Potato |
30 DAA
Not allowed |
| Sequence |
Pod crops
Soybean |
120 DAA
30 DAA |
| Silverado |
Wheat/Durum - hay
forage
grain straw |
50 DAA
30 DAA
55 DAA |
| Sonalan |
Canola/mustard, dry bean
soybean, sunflower
Field pea |
Not allowed
No restriction |
| Sonic |
Soybean |
Not allowed |
| Spartan |
Dry pea, chickpea, soybean
sunflower |
No restriction |
| Starane |
Corn
Small grain - graze/feed
- hay |
47 DAA
7 DAA
14 DAA |
| Starane NXT |
Small grain |
45 DAA |
| Status |
Corn |
32 DAA |
| Steadfast |
Corn |
30 DAA |
| Thistrol |
Field pea |
Not allowed |
| Thifensulfuron |
Soybean, small grain |
Not allowed |
| Thifn&Tribenrn |
Small grain |
Not allowed |
| Tribenuron |
Small grain |
Not allowed |
| Trifluralin |
Canola/mustard, dry bean
pea, lentil, potato, safflower,
sunflower, sugarbeet
Chickpea, flax, soybean,
small grain |
Not allowed
No restriction |
| Ultra Blazer |
Soybean |
Not allowed |
| Valor |
Soybean |
Not allowed |
| WideMatch |
Corn
Small grain - graze/forage
- hay |
47 DAA
7 DAA
14 DAA |
| 2,4-D |
CRP, grass - hay
- graze/feed dairy animal
- graze/feed meat animal
Small grain
- graze/feed/hay dairy animal
- graze/feed/hay meat animal |
30 DAA
7 DAA
3 DAA
14 DAA
No restriction |
| 2,4-DB |
Alfalfa
Soybean |
30 DAA
60 DAA |
Z1. Grazing and
Haying Restrictions for Herbicides Used in Pasture and Rangeland
|
Herbicide1 |
Lactating dairy animals |
All animals except lactating dairy animals |
| Before
grazing |
Before
hay harvest |
Before
grazing |
Before
hay harvest |
Removal before
slaughter |
| |
days after application |
days after application |
| Cimarron/Extra |
0 |
0 |
0 |
0 |
0 |
| Cimarron Max/Extra |
7 |
- |
0 |
0 |
30 |
| Amber |
0 |
30 |
0 |
30 |
0 |
| Clopyralid |
0 |
0 |
0 |
0 |
0 |
| Clopyralid + 2,4-D |
14 |
30 |
0 |
30 |
73 |
| Crossbow |
1 year |
1 year |
02 |
1 year |
3 |
| Dicamba1 |
|
|
|
|
|
| Up to 1 pt |
7 |
37 |
0 |
0 |
30 |
| Up to 2 pt |
21 |
51 |
0 |
0 |
30 |
| Up to 4 pt |
40 |
70 |
0 |
0 |
30 |
| Up to 16 pt |
60 |
90 |
0 |
0 |
30 |
| FallowMaster |
8 weeks |
8 weeks |
8 weeks |
8 weeks |
8 weeks |
| Fuego |
7 |
30 |
0 |
30 |
30 |
| Glyphosate1 |
|
|
|
|
|
| Pre&Renovation - < 1.5 lb ae/A |
No restriction |
No restriction |
No restriction |
No restriction |
No restriction |
| - > 1.5 lb ae/A |
8 weeks |
8 weeks |
8 weeks |
8 weeks |
8 weeks |
| Spot Spray - Monsanto6 |
7 |
7 |
7 |
7 |
7 |
| - Generics |
14 |
14 |
14 |
14 |
14 |
| Broadcast |
8 weeks |
8 weeks |
8 weeks |
8 weeks |
8 weeks |
| Glyphosate + 2,4-D premix5 |
7 |
30 |
3 |
30 |
3 |
| Grazone P + D |
7 |
30 |
7 |
30 |
3 |
| Metsulfuron |
0 |
0 |
0 |
0 |
0 |
| Milestone |
0 |
0 |
0 |
0 |
0 |
| Paramount |
No grazing allowed. Do not hay for 309 days after application. |
| Paraquat4 |
1 month |
1 month |
1 month |
1 month |
0 |
| Plateau |
0 |
7 |
0 |
7 |
0 |
| Rave |
7 |
0 |
0 |
0 |
0 |
| Redeem |
1 year |
1 year |
0 |
1 year |
3 |
| Spike7 |
0 |
1 year |
0 |
1 year |
0 |
| Tordon 22K8 |
14 |
14 |
0 |
14 |
3 |
| 2,4-D/MCPA1 |
7 |
30 |
0 |
30 |
3 |
1Check individual product labels containing the same active ingredients for restrictions and use rates.
2One year if more than 1.5 gallons/A is used.
3Withdrawal not needed if 2 weeks or more time elapsed since application.
4Restrictions based on degree of new seedling establishment before grazing. Suggested at least 6 inches of grass or legume growth.
5No restrictions if 10% or less of the area is treated.
6Do not treat more than one-tenth of any given acre at one time with spot or wiper applications. Remove livestock before application.
7If no more than 20 lb/A used.
8Remove livestock to untreated grass pasture for 7 days before transferring livestock to broadleaf or pasture areas. Removal before
slaughter statement only applies to animals grazing treated forage for 2 weeks immediately after application.
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W-253, January 2008
