Journal of Biological Control

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Five insecticides and ten fungicides at the recommended field dosages were evaluated for their safety to the encyrtid parasitoid Anagyrus dactylopii (How.) and the coccinellid predator Cryptolaemus montrouzieri Muls. of Maconellicoccus hirsutus (Green). Quinalphos (0.05%), endosulfan (0.07%), malathion (0.1%), carbaryl (0.1%) and fenthion (0.1%) proved highly toxic to both the species. Fungicides except fosetyl-Al, dinobuton and dinocap were found harmless. Carbaryl had significantly high toxic residual activity upto 28 days after treatment against both the biocontrol agents. Fungicides, fosetyl-Al (0.2%) dinobuton (0.1%) and dinocap (0.1%) which int1icted 16-40 % mortality of Crypto1aemus adults on the day of application became non-toxic one day after treatment. Toxic residual activity of endosulfan and fenthion against A. dactylopii and C. montrouzieri decreased significantly in 7 days.

Keywords

Anagyrus dactylopii, Cryptolaemus montrouzieri, Safety, Pesticides.
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