Pest Management Science 2019-Jun
EPSPS duplication and mutation involved in glyphosate resistance in the allotetraploid weed species Poa annua L.
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BACKGROUND
Poa annua is a widespread winter annual weed species in California. Recently, poor control of this species with glyphosate was reported by growers in an almond orchard in California with a history of repetitive glyphosate use. The objectives of this research were to evaluate the level of glyphosate resistance in a developed S4 P. annua line (R) and identify the mechanisms of resistance involved.