Seasonal variability in response of Ips pini (Coleoptera: Scolytidae) to ipsdienol in New York

In May, Ips pini in New York did not respond in the field to 50-98.5% (R)-(-)-ipsdienol (synthetic). In September, beetles responded strongly to 50-60% (R)-(-)-ipsdienol (synthetic). In May and June, New York beetles showed marked preference for their own males over Arizona mates, which produce an a...

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