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THE BIOLOGY OF AND EFFECT OF PESTICIDES ON DERAEOCORIS BREVIS PICEATUS (HETEROPTERA: MIRIDAE)1

Published online by Cambridge University Press:  31 May 2012

Peter H. Westigard
Peter H. Westigard
Affiliation:
Southern Oregon Experiment Station, Oregon State University, Medford
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Abstract

Deraeocoris brevis piceatus Knight overwinters in the adult stage on pear and several other plants. Within pear orchards there are apparently two generations of D. brevis per year. Under laboratory conditions the developmental time from first instar to adult is about 25 days. During this period D. b. piceatus consumed nearly 400 eggs and nymphs of the pear psylla, Psylla pyricola Foerster. Most organophosphate pesticides tested were highly toxic to D. b. piceatus when applied directly to nymphs or adults but 7-day-old residues of these chemicals were only moderately toxic. Nonphosphate pesticides allowed fair to good survival of D. b. piceatus but do not fit into the total summer control program for pear pest control.

Type
Articles
Information
The Canadian Entomologist , Volume 105 , Issue 8 , August 1973 , pp. 1105 - 1111
Copyright
Copyright © Entomological Society of Canada 1973

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References

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