Evaluation of dry pea tolerance

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)

Evaluation of dry pea tolerance to fall- vs. spring-applied Spartan in a loam soil (2004)

‘Majoret’ dry pea was seeded April 26 at 120 lb/A into 7.5-inch rows. Individual plots were 10 x 30 ft and replicated three times. Fall herbicide treatments were applied October 6, 2003, and spring treatments were applied April 26, 2004. The primary weed evaluated was kochia. The study was conducted on a loam soil with soil pH 6.0 and 3.0% organic matter.

There was essentially no visible crop injury with any fall or spring treatment. There was no significant difference in plant stand for any treatment. There were no significant differences in yield between any treatments. We included two untreated treatments in the study.

All Spartan treatments provided excellent kochia control. The dry pea crop was excellent and was very competitive with weeds.

			Dry pea		Yield	Test Wt.	Kochia
Treatment	Rate	Timing	May 26	Jul 27	Aug 12		Jun 16	Jul 27
			pl/m row	% injury	lb/A	lb/bu	—— % control ——
Untreated			10.4	0	2953	64.2	0	0
Spartan	2 oz	Fall	9.6	0	3167	64.5	93	100
Spartan	3 oz	Fall	9.5	0	3208	64.5	93	100
Spartan	4 oz	Fall	9.7	0	3181	64.3	98	100
Spartan	5.33 oz	Fall	10.4	2	2929	64.5	100	100
Spartan	2 oz	Spring	10.4	0	2922	64.7	83	100
Spartan	3 oz	Spring	10.2	0	3167	64.7	95	100
Spartan	4 oz	Spring	11.1	0	3378	64.7	98	100
Spartan	5.33 oz	Spring	10.0	0	3182	64.7	100	100
Untreated			10.0	0	2992	64.6	0	0
LSD (0.05)			NS	2	NS	NS	8	1
CV			8.2	548	9	0.8	6	0

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