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Field Bindweed (Convolvulus arvensis) Control with Imazapyr

Published online by Cambridge University Press:  12 June 2017

Monty G. Schoenhals ,
Allen F. Wiese  and
Mark L. Wood
Monty G. Schoenhals
Affiliation:
Texas Agric. Exp. Stn., Bushland, TX 79012
Allen F. Wiese
Affiliation:
Texas Agric. Exp. Stn., Bushland, TX 79012
Mark L. Wood
Affiliation:
Texas Agric. Exp. Stn., Bushland, TX 79012
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Abstract

Sixteen applications of imazapyr and other herbicides were made to field bindweed from 1982 to 1986. Control with imazapyr was 89% or more 1 yr after treatment at 0.14 kg ai ha-1 when plants were growing vigorously at application. Only 1 of 16 applications of imazapyr at 0.56 kg ha-1 controlled less than 90% regardless of plant vigor. Control at 0.56 kg ha-1 was usually superior to that obtained with dicamba at 1.1 and 2.2 kg ae ha-1, and 2,4-D at 1.1 kg ae ha-1, as well as combinations of picloram with either 2,4-D or dicamba. All herbicides were less effective when applied to field bindweed with poor vigor. Winter wheat planted in the fall up to 122 days after application was injured 20 to 88% by imazapyr at 0.14 kg ha-1. Sorghum planted the next spring was injured 15% or less by imazapyr at 0.14 and 0.28 kg ha-1.

Keywords

Dicamba, 3,6-dichloro-2-methoxybenzoic acidimazapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-pyridinecarboxylic acid2,4-D, (2,4-dichlorophenoxy)acetic acidpicloram, 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acidfield bindweed, Convolvulus arvensis L. ♯3 CONARsorghum, Sorghum bicolor (L.) Moench. ‘Jacques 505’winter wheat, Triticum aestivum L. em Thell. ‘Scout 66’Dicambapicloram2,4-DCONAR
Type
Research
Information
Weed Technology , Volume 4 , Issue 4 , December 1990 , pp. 771 - 775
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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