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TRENDS OF EYE-SPOTTED BUD MOTH (LEPIDOPTERA: OLETHREUTIDAE) POPULATIONS OVER 12 YEARS ON TWO CULTIVARS IN AN INSECTICIDE FREE ORCHARD1

Published online by Cambridge University Press:  31 May 2012

C. R. MacLellan
C. R. MacLellan
Affiliation:
Research Station, Agriculture Canada, Kentville, Nova Scotia B4N 1J5
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Abstract

The populations of Spilonota ocellana (D.&S.) on two cultivars in an insecticide free orchard showed nearly identical trends over a 12-year period. Egg populations reached maximum numbers when the orchard was 9 years old and the ensuing larvae infested 33% of the clusters the following year. A marked decline in all stages occurred when the orchard was 11 to 12 years old and this was immediately followed by a second peak of less intensity on both cultivars. The only difference in mortality of the population on the two cultivars was found in neonate larvae. The average survival of egg to pupa for the 12-year period was near 7%.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 1 , 01 January 1978 , pp. 91 - 100
Copyright
Copyright © Entomological Society of Canada 1978

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