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Investigations with the systemic insecticides phorate, O, O-diethyl S-(ethylthio) methyl phosphorodithioate, and Di-Syston, O, O-diethyl S-2-(ethylthio) ethyl phosphorodithioate, for the control of birth leaf miner, Fenusa pusilla (Lepeletier), and eastern spruce gall aphid, Chermes abietis Linnaeus.

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Abstract
Type
dissertation
Date
1962
Publisher
Advisors
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