Weed control in Chickpea

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)

Weed control in Chickpea (2000)

Chickpeas (Sanford) were planted April 28 into 6-inch rows at 150 lb/A in a conventional tillage system. Individual plots were 10 x 30 ft and replicated three times. Treatments were applied preplant incorporated (PPI) on April 26, preemergence (PRE) on May 3, or postemergence (POST) on June 5. Tough was applied postemergence when chickpeas were about 5-6" tall. The primary weeds present were wild buckwheat (Wibw), kochia (Kocz), redroot pigweed (Rrpw), and yellow foxtail (Yeft).

Treatment^a	Rate	Crop density	Crop Injury		Wibw		Kocz		Rrpw	Yeft
Treatment^a	Rate	Crop density	May 25	Jul 15	Jul 15	Aug 21	Jul 15	Aug 21	Jul 15	Aug 21
		pl/m	———%———		———————% Control———————

Untreated		5.1	0	0	0	0	0	0	0	0

PPI
Sonalan	2 pt	3.7	3	0	67	57	79	74	100	75
Treflan	2 pt	----	5	0	60	68	70	57	98	79
Prowl	3.6 pt	----	1	0	73	80	75	65	94	85
Spartan ^a	0.125 lb ai	5.3	4	0	42	45	77	80	73	58
Spartan ^a	0.25 lb ai	4.8	3	0	83	78	93	95	85	80
Spartan ^a	0.5 lb ai	4.0	7	2	91	92	99	99	97	85

PRE
Balance	1 oz	4.9	0	0	0	0	98	95	100	80
Balance	1.5 oz	5.5	0	0	0	0	100	99	100	84
Balance	3 oz	5.0	0	0	0	0	100	99	100	89
Spartan ^a	0.125 lb ai	3.8	0	0	48	53	84	73	83	58
Spartan ^a	0.25 lb ai	4.5	2	0	81	86	100	99	93	72
Spartan ^a	0.5 lb ai	4.4	5	3	95	92	100	100	99	88
Valor ^a	1 oz ai	3.4	12	0	28	23	97	95	98	47
Valor ^a	1.5 oz ai	3.5	18	3	48	43	92	86	97	72
Valor ^a	3 oz ai	3.9	47	3	73	62	98	94	100	70

PPI/POST
Handweeded check^b		3.7	3	0	95	89	100	100	100	94
Treflan / Tough + Assure II+ NIS	1.5 pt / 1.5 pt + 7 fl oz + 0.25 %	----	3	0	75	77	100	96	100	95
LSD		NS	4	2	12	15	15	20	11	12
CV		21	39	196	13	17	11	14	7	10

^a All Spartan and Valor treatments were followed by a POST application of Assure II at 7 fl oz/A.^b To aid handweeding, Treflan (PPI) / Tough + NIS (POST) were applied at 1.5 pt / 1.5 pt + 0.25%.

We evaluated chickpea tolerance to several new herbicides as well as weed control with these new products compared to existing products. Balance, Spartan, and Valor are not labeled for use in chickpea. Spartan at 0.25 lb ai or higher provided good to excellent control of kochia, wild buckwheat, and redroot pigweed. Spartan at 0.125 lb ai did not provide adequate weed control. Balance was effective on kochia and pigweed, but had no effect on wild buckwheat. Valor provided good to excellent kochia and pigweed control, but poor wild buckwheat control. Treflan/Tough provided excellent control of kochia and pigweed, but only fair control of wild buckwheat. Tough alone is weak on wild buckwheat. Chickpea yields are not presented due to the confounding nature of the wild buckwheat pressure and ascochyta that caused severe damage to the study. Treatments that did not effectively control wild buckwheat suffered severe or total yield loss as a result of the high wild buckwheat pressure. A fungicide treatment to control ascochyta was applied too late to prevent severe yield loss.

Last Updated: Thursday, May 27, 2004 02:49:18 PM
Published by North Dakota State University