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POTENTIAL SEX PHEROMONE COMPONENTS OF THE SADDLED PROMINENT (LEPIDOPTERA: NOTODONTIDAE)

Published online by Cambridge University Press:  31 May 2012

P.J. Silk ,
G.C. Lonergan ,
D.C. Allen  and
J. Spear-O’Mara
P.J. Silk*
Affiliation:
Chemical and Biotechnical Services Department, RPC, 921 College Hill Road, Fredericton, New Brunswick, Canada E3B 6Z9
G.C. Lonergan
Affiliation:
Chemical and Biotechnical Services Department, RPC, 921 College Hill Road, Fredericton, New Brunswick, Canada E3B 6Z9
D.C. Allen
Affiliation:
Faculty of Environmental and Forest Biology, SUNY College of Environmental Science and Forestry, Syracuse, New York, United States 13210
J. Spear-O’Mara
Affiliation:
Faculty of Environmental and Forest Biology, SUNY College of Environmental Science and Forestry, Syracuse, New York, United States 13210
*
1 Author to whom all corresponding should be addressed (E-mail: psilk@rpc.unb.ca).
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Extract

Significant outbreaks of saddled prominent, Heterocampa guttivitta (Walker), have been recorded in northern hardwood stands throughout the northeastern United States since 1907 and were first noted in Ontario in 1938 (Martinat and Allen 1988). The insect overwinters as a pupa beneath litter, adult emergence begins in late May and peaks in mid-June, and oviposition activity ends in early July. Consequently, the major impact of defoliation usually occurs in late summer feeding. Principal hosts are sugar maple, Acer saccharum Marsh. (Aceraceae), American beech, Fagus grandifolia (Ehrh.) (Fagaceae), and yellow birch, Betula alleghaniensis Britton (Betulaceae) (Rush and Allen 1987). Two successive years of severe (>75%) defoliation of sugar maple result in significant growth loss (Bauce and Allen 1991), and heavy mortality may occur to understory sugar maple (Grimble and Newel1 1973). The quantity and sugar content of sugar maple sap are dramatically reduced the spring following heavy (>50%) defoliation (Magasi 1981; Handy 1968). Heavy to severe defoliation may cause crown dieback and defoliation and, in concert with other stresses, may initiate maple decline (Giese et al. 1964). Currently, monitoring and evaluation of saddled prominent populations must rely on egg sampling (Grimble and Kasile 1974), a time-consuming process that is inconvenient for survey personnel and landowners. A sex pheromone has not been identified for this species (nor for any other North American Notodontidae) and would be a potentially useful tool for detecting incipient outbreaks, predicting population levels, and evaluating population trends.

Type
Articles
Information
The Canadian Entomologist , Volume 132 , Issue 5 , October 2000 , pp. 681 - 684
Copyright
Copyright © Entomological Society of Canada 2000

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