The first record of PPO and 4-way herbicide resistance in eastern Canada
CANADIAN JOURNAL OF PLANT SCIENCE(2020)
摘要
This is the first record of protoporphyrinogen oxidase (PPO) inhibitor resistance in eastern Canada, and the second record of a glyphosate-resistant weed in Quebec. In 2016 and 2017, waterhemp seed was collected from 25 locations across Ontario and Quebec. All populations tested positive for imazethapyr resistance. Three-way resistance to imazethapyr, atrazine, and glyphosate was confirmed in 80% of the samples. Additionally, between 2015 and 2017, waterhemp seed was collected from 74 locations in Ontario or Quebec and resistance to lactofen was confirmed in 28% of the seed lots screened.
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关键词
glyphosate resistance,protoporphyrinogen oxidase inhibitors,multiple-resistant,waterhemp
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