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EFFECT OF ADDITIONAL COMPONENTS ON A SEX ATTRACTANT FOR THE OAK LEAF SHREDDER, CROESIA SEMIPURPURANA (LEPIDOPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

G. G. Grant ,
D. Frech ,
L. MacDonald  and
B. Doyle
G. G. Grant
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
D. Frech
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
L. MacDonald
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
B. Doyle
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
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Extract

The oak leaf shredder, Croesia semipurpurana (Kearfott), has been a particularly persistent pest of red oak, Quercus rubra, in southern Ontario for several years. It is capable of completely defoliating mature trees leading either to increased susceptibility to disease or mortality. In 1980 about 800 ha in southern Ontario required spraying with Orthenem insecticide (Howse and McDowall 1980). The development of a sex pheromone lure for the oak leaf shredder would be valuable for survey purposes, post-insecticidal spray analysis of adult survival in treated plots, and for potential direct control by means of the disruption technique. Recently mixtures of (E)-11-tetradecenal (E11-14:AL) and Z11-14:AL in the ratios of 80:20 to 90:lO were found to be attractive to male moths (Weatherston et al. 1978). A local outbreak of oak leaf shredder in Sault Ste. Marie afforded an opportunity to determine the insect's response to modifications of the aldehyde blend in order to improve the efficiency of pheromone trapping of this species.

Type
Articles
Information
The Canadian Entomologist , Volume 113 , Issue 5 , May 1981 , pp. 449 - 451
Copyright
Copyright © Entomological Society of Canada 1981

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References

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