Weed Control Practices

    The most common chemical weed control practices were post-applied bentazon (Basagran, others) and spring pre-plant incorporated Sonalan, each used on 62% of Northarvest respondents' acres (Table 27). The use of Sonalan was slightly lower than in 1995 and the use of bentazon was slightly higher. Other common chemical weed control practices included post-applied Poast on 25% of respondents' acres, post-applied Pursuit on 20%, and spring pre-plant applied trifluralin (Treflan, others) on 17%. Other chemical control practices included spring pre-plant incorporated Eptam, post-applied Assure II, and various other chemical control practices used on less than 5% of respondents' acres.

    The most common cultural weed control practice was row cultivation, used by 81% of Northarvest respondents on 79% of their acres (Table 27). Rotary hoe was used by 22% of respondents on 18% of their acres. These percentages are slightly lower than those for 1995.

    In Minnesota, post-applied bentazon was applied to 55% of respondents' acres, followed by spring pre-plant incorporated Sonalan on 52%, post-applied Poast on 29%, spring pre-plant incorporated trifluralin on 21%, spring pre-plant incorporated Eptam on 15%, pre-plant applied alachlor (Lasso, others) on 13%, and post applied Pursuit on 10% (Table 28). Use of bentazon was up from 1995, when it was applied on 45% of respondents' acres. Use of Pursuit was down from 1995, when it was applied on 17% of respondents' acres. Row cultivation was used on 85% of Minnesota respondents' acres and rotary hoe was used on 30%.

    In North Dakota, spring pre-plant incorporated Sonalan was applied to 65% of respondents' acres, followed by post-applied bentazon on 64%, post-applied Poast on 24%, post-applied Pursuit on 23%, and spring pre-plant incorporated trifluralin on 16% (Table 28). Use of Pursuit was up from 1995, when it was applied on 12% of respondents' acres. Row cultivation was used on 77% of North Dakota respondents' acres, down from 90% in 1995. Rotary hoe was used on 15% of respondents' acres, half the percentage in Minnesota.

    Post-applied bentazon (Basagran, others) was the most commonly used herbicide in MN3, MN4, MN5 and ND1, ND2 and ND5. Spring pre-plant incorporated Sonalan was the most commonly used herbicide in MN1, MN2 and ND3 (Table 29). Post-applied Pursuit was the most commonly used herbicide in ND4.

    Sodium chlorate was the most commonly used desiccant in all five Minnesota districts and ND1, ND2, ND4 and ND5 (Table 30). Grammoxone extra was the most commonly used desiccant in ND3. Desiccant use was greatest in MN4, with 39% of respondents’ acres treated, followed by MN5 with 24%, MN3 with 21%, and ND1 with 20% of respondents’ acres treated.

    Inter-row cultivation was used on the majority of respondents’ acres in all districts. Values were calculated per cultivation so acres that received more than one cultivation would have percentages over 100%. There were 102% of MN2, 99% of MN3, 91% of MN5, 87% of MN4 and ND3, 83% of ND1, 81% of MN1, 78% of ND4, 71% of ND2, and 59% of ND5 respondents’ acres cultivated (Table 31). In addition to inter-row cultivation, rotary hoe was used on 49% of MN1; 28% of ND4; 16% of ND1, ND2, and MN5; 13% of MN2; 12% of ND3; 11% of MN3; 9% of MN4, and 4% of ND5 respondents’ acres.

    A majority of respondents in all districts used two cultivations; fewer respondents used one cultivation and very few used three cultivations or more (Table 32). Four or more cultivations were used by a few respondents in MN1, MN5, ND1, ND2 and ND3.

    The rotary hoe was used once by most respondents in all districts, with 66% to 100% of respondents reporting a single use of the rotary hoe (Table 33). In ND1, ND2, and ND3 13%, 22% and 19% of respondents used two or three passes with the rotary hoe. In MN1, 34% of respondents used two, three or four passes with a rotary hoe.

Table 27. Weed control practices^a in 1996 by all Northarvest
respondents in Minnesota and North Dakota.

aIncludes all practices or herbicides used on more than 1,000 acres.
^bRespondents’ acres only.

Table 28. Common weed control practices^a in 1996 by
respondents in Minnesota and North Dakota.

Table 29. Herbicides commonly used in 1996 in each Northarvest
district in Minnesota and North Dakota.

Table 30. Desiccants used in 1996 in each Northarvest district in
Minnesota and North Dakota.

aDistrict respondents’ acres only.

Table 31. Use of cultivation and rotary hoe in 1996 in each
Northarvest district in Minnesota and North Dakota.

aDistrict respondents’ acres only.

Table 32. Number of cultivations of dry beans in 1996 in each
Northarvest district in Minnesota and North Dakota.

a% of respondents answering question.

Table 33. Number of times rotary hoe was used on dry beans in
1996 in each Northarvest district in Minnesota and North Dakota.

a% of respondents answering question.

This site was last updated on November 14, 2002

202 Hultz Hall
Department of Entomology
College of Agriculture
Fargo, North Dakota 58105-5346
Phone: (701) 231-7581
FAX: (701) 231-8557

For more information, please contact:

Extension Entomologist: Phillip Glogoza   pglogoza@ndsuext.nodak.edu