Dimilin Toxicity to the Gypsy Moth Larval Parasitoid, Apanteles melanoscelus12

15 October 1975

journal article
Published by Oxford University Press (OUP) in Journal of Economic Entomology

Vol. 68 (5) , 577-580
https://doi.org/10.1093/jee/68.5.577

Abstract

Larvae of Apanteles melanoscelus (Ratzeburg) were exposed to Dimilin® (1-(4-chlorophenyl)-3-(2,6-difluoroben-zoyl)-urea) by feeding treated artificial diet to parasitized gypsy moth hosts. The EC₅₀ and EC₉₅ for the parasitoid were 0.0059 and 0.026 ppm, respectively. The EC₅₀ of A. melanoscelus was similar to that of the host. Dimilintreated leaves fed to hosts produced effects on parasitoids during their 2nd–3rd larval molt and later in development. The toxicity is a direct effect of the chemical and not due to host morbidity. Dimilin does not affect progeny production when fed to adult female parasitoids. These experiments suggest that Dimilin may be used in an integrated program compatibly with A. melanoscelus.

Keywords

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