Abstract
In tests and observations on caged trees and in the laboratory, DDT residues were highly toxic to adults of M. ancylivorus and Horogenes molestae, but much less toxic to Phanerotoma grapholithae, Agathis festiva, and the oriental fruit moth. Light parathion residues were extremely toxic to oriental fruit moth, H. molestae, and P. grapholithae but not to A. festiva.

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