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Emergence trap developed to capture adult large pine weevil Hylobius abietis (Coleoptera: Curculionidae) and its parasite Bracon hylobii (Hymenoptera: Braconidae)

Published online by Cambridge University Press:  09 March 2007

R. Moore
R. Moore*
Affiliation:
Entomology Branch, Forest Research, Northern Research Station, Roslin, Midlothian, EH25 9SY
*
*Fax: 0131 445 5124 E-mail: R.Moore@forestry.gsi.gov.uk
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Abstract

A novel type of emergence trap capable of capturing and separating ‘live’insect catches is described. The trap was shown to be 96% efficient at capturing newly emergent adult Hylobius abietis Linnaeus on bare ground and at least 82% efficient over stumps on a weedy Sitka spruce clearfell. The trap was more than 80% efficient at capturing Bracon hylobii Ratzeburg, the most commonly found parasite of H. abietis. It was also shown to be effective at capturing adult H. abietis of unknown age (98%), indicating that it could also be used to trap out H. abietis from known areas to estimate on-site overwintering densities. Fifty-four percent of newly emergent weevils were captured within 12 h of release on bare mineral soils. Forty-two percent of unknown age weevils and 52% of parasites were captured within 1 h of their release within the trap. The rapid rates of capture mean that when traps are checked frequently they can be used to reflect accurately temporal patterns of emergence. Its potential for use in control programmes and ecological studies is discussed.

Type
Research Article
Information
Bulletin of Entomological Research , Volume 91 , Issue 2 , April 2001 , pp. 109 - 115
Copyright
Copyright © Cambridge University Press 2001

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