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DEVELOPMENT, HATCH DATES, OVERWINTERING SUCCESS, AND SPRING EMERGENCE OF A “NON-DIAPAUSING” GYPSY MOTH STRAIN (LEPIDOPTERA: ORGYIIDAE) IN FIELD CAGES

Published online by Cambridge University Press:  31 May 2012

Marjorie A. Hoy
Affiliation:
Department of Entomological Sciences, University of California, Berkeley 94720 andU.S.F.S. Northwest Forest Experiment Station, Hamden, Connecticut 06514
Nancy Fike Knop
Affiliation:
Department of Entomological Sciences, University of California, Berkeley 94720 andU.S.F.S. Northwest Forest Experiment Station, Hamden, Connecticut 06514

Abstract

Newly-hatched larvae from a selected (S) “non-diapausing” gypsy moth strain and larvae from field-collected wild (W) eggs were reared in field cages in Connecticut, U.S.A. beginning May 1976 to determine developmental rates and interbreeding potential. Reciprocal and inter se matings between S and W moths were monitored to determine if hatch occurred during the fall and if S and reciprocal F1 hybrid (SW, WS) eggs could successfully overwinter and hatch at an appropriate time the following spring. Hatch of S eggs did occur in the fall. Survival of SW, WS, and some S eggs over the Connecticut winter demonstrated that this non-diapause colony is not suitable for a genetic control program in which the non-diapause trait is expected to act as a conditional lethal.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1978

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