Quesada, C.R., & Sadof, C.S. 2020 Residual toxicity of insecticides to Chrysoperla rufilabris and Rhyzobius lophanthae predators as biocontrol agents of pine needle scale. Crop Protection 130: 105044
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Notes: In our previous work, insecticides did not affect seasonal abundance of parasitoids and predators of scale insects when they were applied one-month before their peak of season activity. In contrast, when applied during periods of natural enemy activity, trees treated with the broad-spectrum insecticide bifenthrin had fewer parasitoids and predators than trees treated with horticultural oil or the reduced risk insecticides pyriproxyfen, spiromesifen, and spirotetramat. In the current study we determined whether, bifenthrin, and the other insecticides differed in residual toxicity to two common predators,