Toxicity of insecticides to parasites of the spotted tentiform leafminer (Lepidoptera: Gracillariidae)

Hagley, E.A.C.; Pree, D.J.; Simpson, C.M.; Hikichi, A.

Canadian Entomologist 113(10): 899-906

1981


ISSN/ISBN: 0008-347X
DOI: 10.4039/ent113899-10
Accession: 001023117

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Abstract
In studies in the laboratory and on apple in the field in Ontario, cypermethrin was more toxic to adults of Apanteles ornigis Weed (the major parasite of Phyllonorycter blancardella (F.)) than fenvalerate, permethrin, azinphos-methyl or methomyl. Endosulfan was the least toxic insecticide. Permethrin, however, was 19 times as toxic to P. blancardella as to A. ornigis, and could be most useful in an integrated pest management programme. Several species of Sympiesis that also parasitise P. blancardella showed less susceptibility than A. ornigis to azinphos-methyl.