Synthetic pyrethroids (Decis, Matador/Silencer, for examples) benefit from late-day spraying because they should be applied when temperatures are below 25°C.
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Are those flea beetles worth spraying?
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May 28, 2013 A few flea beetles in a field are not worth the time and investment to spray. They will not cause economic losses. Only when defoliation reaches 25%…