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A SAMPLING PROGRAM DEVELOPED FOR POTATO LEAFHOPPER NYMPHS, EMPOASCA FABAE (HOMOPTERA: CICADELLIDAE), ON ALFALFA

Published online by Cambridge University Press:  31 May 2012

D. E. Simonet  and
R. L. Pienkowski
D. E. Simonet
Affiliation:
Department of Entomology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
R. L. Pienkowski
Affiliation:
Department of Entomology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
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Abstract

Populations of potato leafhopper nymphs were sampled in two alfalfa fields throughout the summers of 1976 and 1977 in Montgomery County, Virginia. A dichlorvos-carton sampling method was used to collect nymphs from 3-stem alfalfa bouquets. Instars were based on head capsule measurements. The spatial distribution of nymphs generally fit the negative binomial model. Based on this distribution pattern optimum sample sizes were computed. The nymphal population can be reliably estimated within 20% c.v. during most of the alfalfa growth period. Although most variation was shown to be between samples and not between areas in the field, samples should be taken at random over the entire area of the field under study.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 4 , April 1979 , pp. 481 - 486
Copyright
Copyright © Entomological Society of Canada 1979

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