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COMPARISON OF GREENHOUSE AND FIELD RESISTANCE OF BEAN VARIETIES TO EMPOASCA KRAEMERI (HOMOPTERA: CICADELLIDAE)1

Published online by Cambridge University Press:  31 May 2012

Fred M. Eskafi  and
Aart V. Schoonhoven
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Abstract

Resistance of 360 varieties of Phaseolus vulgaris L. to Empoasca kraemeri (Ross and Moore) was tested in the greenhouse. Thirty promising varieties were subsequently evaluated for resistance in the field when 30 days old. Seedlings in the greenhouse were infested with field collected adults for 3 days, and the resistance was tested against first generation nymphs. A highly significant positive correlation existed under greenhouse conditions between the numbers of nymphs present on the plant and the plant damage (expressed as quality) under low, but not high infestation pressure. No such relation was found in the field. There was no correlation between numbers of nymphs found on the 30 varieties in the greenhouse and the field, but there was a highly significant correlation in the damage (quality). No correlation was found in the field between the numbers of nymphs and the plant height or volume. A rank correlation test showed that quality (resistance) of the plants was highly significantly related in the greenhouse and field tests.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 8 , 01 August 1978 , pp. 853 - 858
Copyright
Copyright © Entomological Society of Canada 1978

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