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Response of Dendroctonus pseudotsugae (Coleoptera: Scolytidae) and Thanasimus undatulus (Coleoptera: Cleridae) to Traps with Different Semiochenricms

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The attractiveness of frontalin alone and in combinations with ethanol, MCOL (1-methylcyclohex-2-en-1-01), and seudenol (3-methylcyclohex-2-en-l-ol) to the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, and associated predators was determined in northeastern Oregon. All three alcohols significantly increased attractiveness of frontalin to the Douglas-fir beetle. Seudenol was most attractive followed by ethanol and MCOL, respectively. Seudenol plus ethanol was the only combination of alcohols that significantly increased attractiveness of frontalin more than that of seudenol alone. There was no increase in attractiveness to the Douglas-fir beetle with addition of MCOL to a lure containing ethanol or seudenol, or both. Seudenol significantly In creased the percentage of male Douglas-fir beetles trapped, but ethanol had the opposite effect. MCOL had no significant effect on the sex ratio of trapped Douglas-fir beetles. Thanasimus undatulus (Say) was the only predator caught in appreciable numbers. Seudenol significantly increased the number of T. undatulus caught in the traps compared with the oilier alcohols. These results suggest that the combination of frontalin, seudenol, and ethanol is the most effective lure tested for trapping the Douglas-fir beetle.

Document Type: Research Article

Publication date: February 1, 1995

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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