Compatibility of sulfoxaflor and other modern pesticides with adults of the predatory mite Amblyseius swirskii. Residual contact and persistence studies

Abstract

Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) is a very efficient generalist predatory mite of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) and Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), worldwide released in horticultural greenhouses. Here, the toxicity of sulfoxaflor and other ten pesticides to A. swirskii adults when applied at their maximum field rate was assessed in the laboratory in terms of mortality and reproductive performance. The duration of the harmful activity when residues were aged under greenhouse was assessed for compounds not classified as harmless in the laboratory, based on the International Organization for Biological Control (IOBC) rules. Sulfoxaflor as well as flonicamid, flubendiamide, metaflumizone, methoxyfenozide, spiromesifen, and spirotetramat were harmless, emamectin was slightly harmful and abamectin, deltamethrin and spinosad were harmful. Emamectin was short-lived and abamectin, deltamethrin and spinosad were slightly persistent under our conditions.