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JUVENILE HORMONE ANALOGUE TOXICITY TO LABORATORY REARED GYPSY MOTH LARVAE, PORTHETRIA DISPAR (LEPIDOPTERA: LYMANTRIIDAE)

Published online by Cambridge University Press:  31 May 2012

J. Granett
J. Granett
Affiliation:
Department of Entomology, The Connecticut Agricultural Experiment Station, New Haven
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Abstract

Juvenile hormone analogues (JHA) were fed in an artificial diet to laboratory reared Porthelria dispar (L.) larvae. The analogues used were: I: Stauffer R-20458; 1-(4′-ethylphenoxy)-6,7-epoxy-3,7-dimethyl octene. II: Altozar®. III: Hoffmann-La Roche Ro 8-5497; 10,11-epoxy-3,7,11-trimethyl-1-(2-propynyloxy)-2,6-tridecadiene. For JHA I and II mortality occurred primarily during the larval and pupal stages with overall EC50 values from 0.19 to 0.43 p.p.m. in the diet. JHA III was not toxic. The log-probit dose–mortality curves showed low slopes. Morphologic aberrations in treated larvae and pupae were observed.

Type
Articles
Information
The Canadian Entomologist , Volume 106 , Issue 7 , July 1974 , pp. 695 - 699
Copyright
Copyright © Entomological Society of Canada 1974

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