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Psylla pyricola Foerster Suppresses Pear Tree Root Development1

Published online by Cambridge University Press:  31 May 2012

W. H. A. Wilde
Affiliation:
Research Station, Canada Department of Agriculture, Summerland British Columbia
D. L. McIntosh
Affiliation:
Research Station, Canada Department of Agriculture, Summerland British Columbia

Abstract

Foliage feeding by the pear psylla suppressed root development in seedlings of Pyrus communis, P. ussuriensis, and P. pyrifolia. Reduction in the size of the root system was greatest in seedlings with the heaviest infestations. Psyllid populations were established more readily on seedlings of P. communis than on the oriental seedlings of P. ussuriensis or P. pyrifolia.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1964

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References

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