Abstract
Predatory arthropods are commonly used as biological control agents (BCAs). They are released in commercial vegetable greenhouses as primary elements of integrated pest management programmes for some of the most devastating pests on pepper and tomato in southeastern Spain. Emamectin benzoate, a macro-cyclic lactone insecticide derived from the avermectin family of natural products, is being developed for the control of Lepidoptera pests on a variety of crops in Europe including vegetables. The compatibility of emamectin benzoate with the predatory BCAs Amblyseius swirskii Athias-Henriot and Orius laevigatus (Fieber) in field trials (direct spray and aged residues) and Macrolophus pygmaeus (Rambur) and Chrysoperla carnea (Stephens) in semi-field studies was studied. Emamectin benzoate at the highest recommended concentration (14.25 mg L−1) was compatible with A. swirskii and O. laevigatus when applied 3 days before the introduction of the arthropods, but it was toxic when directly sprayed. M. pygmaeus and C. carnea adults survived to direct spray applications.
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