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BACKGROUND:Laodelphax striatellus (Fallén) is a major pest of cultivated rice and is commonly controlled in China with the organophosphate insecticides. To develop a better resistance management strategy, a chlorpyrifos‐resistant strain of L. striatellus was selected in the laboratory, and its cross‐resistance to other insecticides and possible mechanisms of the chlorpyrifos resistance were investigated...
BACKGROUND
Spodoptera litura is an important agricultural pest and has developed serious resistance to multiple insecticides. The resistance level to several insecticides is reported to be unstable, but the mechanism is less reported.
RESULTS
Chlorpyrifos and phoxim resistance level in a field‐collected population of S. litura declined continuously from the first to the tenth generation and remained...
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