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Halosulfuron Interactions with other Processing Tomato (Lycopersicon esculentum Mill) Herbicides

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Title: Halosulfuron Interactions with other Processing Tomato (Lycopersicon esculentum Mill) Herbicides
Author: Eyamie, Jordan; Robinson, Darren; Sikkema, Peter; VanAcker, Rene; Soltani, Nader
Department: Department of Plant Agriculture
Program: Plant Agriculture
Advisor: Robinson, Darren
Abstract: Tomatoes are an economically important crop in Ontario that can be adversely affected by weed interference. Halosulfuron is a relatively new herbicide that can provide broad-spectrum weed control when applied in a tankmix solution and can provide solutions for growers who have triazine-resitant weeds. Herbicide tankmixes could interact antagonistically, additively or synergistically. Experiments in Ridgetown, ON were repeated 4 times over 2 years (2015 and 2016) in order to determine if there were any antagonistic, additive or synergistic interactions on tomato injury and weed control efficacy between halosulfuron at three rates (25, 37.5 and 50 g ai ha-1) and commonly used POST and pre-transplant tomato herbicides. Results suggested no increase in tomato injury. There were additive interactions between halosulfuron and other broadleaf tomato herbicides. Results showed antagonistic interactions between halosulfuron and POST tomato graminicides. Halosulfuron will provide growers with an additional tool to improve weed control and combat triazine-resitant weeds.
Date: 2019-05
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