Abstract
Four analogues of insect juvenile hormone were tested for effects on 6th instars of Choristoneura occidentalis Freeman. These were Law’s juvenile hormone mixture; 10,11-epoxymethylfarnesenate; 3-ethyl-7-methyl-6-epoxy-2-nonene-1-oxy (3,4-methylenedioxy benzene), and 3,7-dimethyl-6-epoxy-2-octen-1-oxy (3,4-methylenedioxy benzene). The purpose was to observe effects of these chemicals on fecundity, metamorphosis, and survival. At low dosages, the compounds tended primarily to decrease egg production and hatch. Higher dosages resulted in increasing degrees of morphogenetic juvenilization. Some of the more potent compounds caused supernumerary molts.
Published Version
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