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A STUDY OF PHEROMONE TRAP CATCHES IN RELATION TO CODLING MOTH (LEPIDOPTERA: OLETHREUTIDAE) DAMAGE12

Published online by Cambridge University Press:  31 May 2012

H. Riedl  and
B. A. Croft
H. Riedl
Affiliation:
Department of Entomology, Michigan State University, East Lansing
B. A. Croft
Affiliation:
Department of Entomology, Michigan State University, East Lansing
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Abstract

A sex pheromone trap was studied as a quantitative sampling device in a biological monitoring scheme for codling moth populations in Michigan apple orchards. Factors influencing trap efficiency and the relationship of trap catch to adult moth density and the overall seasonal dynamics of L. pomonella are considered.

By correlating seasonal male moth catches to absolute infestation levels at harvest it was possible to indicate the density response of male moth catches in the pheromone trap (Sectar 1). Catch response was non-linear and the trap ceased to be indicative of higher infestation levels when accumulative catch exceeded about 100 moths/trap. Also, accumulative trap catches from the first few weeks of the season (before damage appeared) correlated well with eventual infestation levels indicating possible use of the pheromone trap as a predictive tool. Of the many factors influencing trap catch size the number of moth productive trees serviced by a trap (trap/tree ratio) was shown to be of critical importance.

Type
Articles
Information
The Canadian Entomologist , Volume 106 , Issue 5 , May 1974 , pp. 525 - 537
Copyright
Copyright © Entomological Society of Canada 1974

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