Abstract
Field studies were conducted in various locations in Ontario during 2011 to 2013 to evaluate s-metolachlor, imazethapyr and linuron applied preemergence (PRE) alone and in tankmix combination for the control of troublesome weeds in kidney bean. S-metolachlor, imazethapyr, linuron, s-metolachlor + imazethapyr, s-metolachlor + linuron and s-metolachlor + imazethapyr + linuron applied PRE at rates evaluated caused 3% or less injury in kidney bean. S-metolachlor provided 87% - 91% control of redroot pigweed, 46% - 55% control of common lambsquarters, and 96% - 97% control of green foxtail. Imazethapyr provided 93% - 96% control of redroot pigweed, 96% - 99% control of lambsquarters and 86% - 93% control of green foxtail. Linuron provided 82% - 98% control of lambsquarters, 82% - 99% control of redroot pigweed and 55% - 85% control of green foxtail. The tank mixes of s-metolachlor plus imazethapyr, s-metolachlor plus linuron, and s-metolachlor plus imazethapyr plus linuron provided 92% - 100% control of lambsquarters, redroot pigweed and green foxtail. Generally, kidney bean yields reflected the level of weed control. Based on these results, tank mixes of s-metolachlor plus imazethapyr, s-metolachlor plus linuron, and s-metolachlor plus imazethapyr plus linuron all provide an adequate margin of crop safety and excellent control of redroot pigweed, common lambsquarters and green foxtail in kidney bean.
Highlights
Dry bean is an important crop in many countries around the world
These results are similar to other studies that have shown less than 4% injury in kidney bean with linuron applied applied PRE at 1125 and 2250 g a.i. ha−1 [17]
S-metolachlor, imazethapyr, linuron, s-metolachlor + imazethapyr, s-metolachlor + linuron and s-metolachlor + imazethapyr + linuron applied PRE at rates evaluated had an adequate margin of crop safety for use in kidney bean
Summary
Dry bean is an important crop in many countries around the world. Ontario has been one of the leading provinc-How to cite this paper: Soltani, N., et al (2014) Weed Management in Kidney Bean with Tank Mixes of S-Metolachlor, Imazethapyr and Linuron. Dry bean is a warm season crop which is evaluated based on its seed size, shape and colour and is very sensitive to weed interference due to its short physical characteristics [3]-[7]. In Ontario, yield losses of up to 70% have been documented in dry bean when weeds were not controlled [8]. If weeds are not adequately controlled in dry bean at harvest time, they can interfere with harvesting efficiency and cause staining of the beans, reducing seed quality and marketability [9]-[12]. There are a limited number of herbicide options that provide broad spectrum weed control in dry bean in Ontario. More research is needed to identify herbicides/tank mixes that have an adequate margin of crop safety and provide consistent broad spectrum control of troublesome weeds in dry bean
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