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THE BIOLOGY AND ECOLOGY OF THE COTTONWOOD LEAF BEETLE, CHRYSOMELA SCRIPTA (COLEOPTERA: CHRYSOMELIDAE), ON TISSUE CULTURED HYBRID AIGEIROS (POPULUS × EURAMERICANA) SUBCLONES IN WISCONSIN1

Published online by Cambridge University Press:  31 May 2012

T.R. Burkot  and
D.M. Benjamin
T.R. Burkot
Affiliation:
Department of Entomology, University of Wisconsin, Madison 53706.
D.M. Benjamin
Affiliation:
Department of Entomology, University of Wisconsin, Madison 53706.
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Abstract

Adults and larvae of the cottonwood leaf beetle, Chrysomela scripta Fab., defoliated tissue cultured Aigeiros (Populus × euramericana (Dode) Guinier) subclones and destroyed apical tips. Fecundity was 510 ± 153 eggs . Four generations occurred between May and September in southern Wisconsin. Maximal insect numbers and damage occurred in the third generation. The minimal developmental threshold was 10.8 °C with a mean 257 ± 26 day-degree (°C) required per generation. Important biological control agents included Coleomegilla maculata, which consumed up to 25% of the eggs, and Shizonatus latus, a pteromalid parasite, which destroyed up to 26% of the pupae.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 5 , May 1979 , pp. 551 - 556
Copyright
Copyright © Entomological Society of Canada 1979

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