Effect of seeding depth on dry p

North Dakota State University

NDSU

North Central Research Extension Center

Brian Jenks Weed Scientist bjenks@ndsuext.nodak.edu
Denise Markle Research Specialist dmarkle@ndsuext.nodak.edu	Gary Willoughby Research Specialist gwillough@ndsuext.nodak.edu

5400 Highway 83 South
Minot, ND 58701-7662
701.857.7679
701.857.7676 (fax)

Effect of seeding depth on dry pea tolerance to sulfentrazone in a sandy loam soil (2004)

‘Majoret’ dry pea was seeded April 26 at 120 lb/A into 7.5-inch rows at either 1- or 2-inch seeding depth. Individual plots were 10 x 30 ft and replicated three times. Herbicide treatments were applied preemergence (PRE) on May 5 or postemergence (POST) on June 18. The study was conducted on a sandy loam soil with soil pH 5.3 and 2.8% organic matter. We expect that very little Spartan injury occurred since the soil pH was very low.

There were no significant differences in crop stand between the 1- and 2-inch seeding depths. There was essentially no visual crop injury from Spartan treatments at either depth. Basagran caused approximately 5% injury. In July, kochia control was excellent with any Spartan treatment. Kochia control with Basagran was generally about 10% less than with Spartan. The dry pea crop was excellent and was very competitive with weeds. There was no significant difference in dry pea yield between treatments.

			Dry Pea		Kochia		Yield	Test Wt
Treatment^a	Rate	Timing	May 27	Jul 13	Jun 16	Jul 13	Aug 12
1-inch depth			pl / m row	% injury	% control		lb/A	lb/bu
Untreated			10.0	0	0	0	3386	64.6
Spartan	2.67 oz	PRE	10.0	0	85	100	3468	64.7
Spartan	4 oz	PRE	11.3	0	100	100	3501	65.4
Spartan	5.33 oz	PRE	9.7	1	100	100	3337	65.2
Basagran	1 pt	POST	9.5	5	0	88	3452	65.1
Handweeded check^b			9.9	5	0	100	3313	65.3

2-inch depth
Untreated			11.3	0	0	0	3496	64.7
Spartan	2.67 oz	PRE	11.2	0	96	98	3709	65.2
Spartan	4 oz	PRE	10.1	0	95	100	3531	64.7
Spartan	5.33 oz	PRE	9.5	0	100	99	3788	64.7
Basagran	1 pt	POST	10.1	5	0	91	3618	64.8
Handweeded check^b			9.2	5	0	100	3551	64.9
LSD (0.05)			NS	1	5	5	NS	NS
CV			10.8	10	6	4	7	1.3

^aSelect was applied with COC at 5 oz + 1% v/v, respectively, to all treatments.

^bHandweeded checks were treated with Basagran at 0.5 pt and Select at 5 oz to aid hand weeding.

PLEASE NOTE: Some treatments shown may be experimental and not labeled for general use. Always check herbicide labels before applying.
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North Dakota State University NDSU Agriculture VP and Dean of Agriculture, Food Systems, and Natural Resources NDSU Extension Service College of Agriculture, Food Systems, and Natural Resources State Board of Agricultural Research and Education	Brian Jenks, Weed Scientist North Central Research Extension Center 5400 Highway 83 South Minot, ND 58701--7662 Tel. 701.857.7677 Fax. 701.857.7676 http://www.ag.ndsu.nodak.edu/minot

Last Updated: Thursday, June 09, 2005 10:48:46 AM
Published by North Dakota State University