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BEHAVIOR OF IPS PINI DURING MATING, OVIPOSITION, AND LARVAL DEVELOPMENT (COLEOPTERA: SCOLYTIDAE)

Published online by Cambridge University Press:  31 May 2012

Richard F. Schmitz
Richard F. Schmitz
Affiliation:
Intermountain Forest and Range Experiment Station, U.S.D.A. Forest Service, Ogden, Utah
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Abstract

Behavior of the pine engraver Ips pini (Say) was observed through plexiglass rearing chambers containing ponderosa pine (Pinus ponderosa Lawson) phloem. Periods of jostling in each entrance tunnel between the resident male and entering female preceded a female’s admission to the nuptial chamber. On the average, mating was completed in 25 seconds. In the gallery, beetles walked on protibial spines, keeping their tarsi folded against their tibiae. Eggs were deposited in niches on either side of the egg gallery and covered by phloem fragments. Larvae mined at right angles to the egg gallery and formed their molting chambers by doubling back and packing frass tightly against that already in the gallery. Larvae consumed their exuviae shortly after molting. Feeding by callow adults on prepupae and pupae may be an important natural control.

Type
Articles
Information
The Canadian Entomologist , Volume 104 , Issue 11 , November 1972 , pp. 1723 - 1728
Copyright
Copyright © Entomological Society of Canada 1972

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