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Bentazon Tank-Mixtures for Improved Redroot Pigweed (Amaranthus retroflexus) and Common Lambsquarters (Chenopodium album) Control in Navy Bean (Phaseolus vulgaris)

Published online by Cambridge University Press:  12 June 2017

David A. Wall
David A. Wall*
Affiliation:
Agric. and Agri-Food Canada, Agri-Food Diversification Research Centre, Unit 100–101, Route 100, Morden, MB, Canada, R6M 1Y5
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Abstract

Field studies were conducted from 1991 to 1994 to investigate the effectiveness of reduced rates of bentazon in tank-mixtures with imazethapyr, thifensulfuron, or HOE 075032 for improved control of redroot pigweed and common lambsquarters in navy bean. Tank-mixtures of bentazon at 600 g ai/ha plus imazethapyr at 25 g/ha or HOE 075032 at 5 to 15 g/ha controlled both redroot pigweed and common lambsquarters. These rates represent an approximate 45% reduction in total amount of active ingredient needed to control these weeds compared with full label rates. Bentazon tank-mixtures with 2 or 4 g/ha of thifensulfuron controlled these weeds but caused severe injury and delayed crop maturity. In greenhouse studies, the GR25 for HOE 075032 in navy bean was > 90 g/ha, while in soybean it was 16 to 24 g/ha.

Keywords

Bentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxideHOE 075032, 3-(4,6-dimethoxypyrimidin-2-yl)-1-(N-methyl-N-methylsulfonyl-aminosulfonyl)ureaimazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidthifensulfuron, 3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]-2-thiophenecarboxylic acidcommon lambsquarters, Chenopodium album L. # CHEALredroot pigweed, Amaranthus retroflexus L. # AMAREnavy bean, Phaseolus vulgaris L. ‘Seafarer’soybean, Glycine max (L.) Merr.Crop injuryreduced ratesweed controlyieldamidosulfuronimazethapyrthifensulfuronAMARECHEAL
Type
Research
Information
Weed Technology , Volume 9 , Issue 3 , September 1995 , pp. 610 - 616
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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