Role of Parasites in the Population Dynamics of the Western Spruce Budworm (Lepidoptera: Tortricidae) in the Northwest
- 1 April 1984
- journal article
- research article
- Published by Oxford University Press (OUP) in Environmental Entomology
- Vol. 13 (2) , 568-573
- https://doi.org/10.1093/ee/13.2.568
Abstract
The relation of parasitization to mortality during the generation ( K G ) or from instar IV to adults ( K L-A ) of western spruce budworm, Choristoneura occidentalis Freeman, is examined. Parasitization of budworm larvae and pupae was studied over a wide range of densities (0.3–48.3 larvae per m 2 and 0.1–22.6 pupae per m 2 ) at sites in Washington, Oregon, Idaho, and Montana. We found that parasites contributed about 9% of the variation affecting generation change, K G , and about 24% of variation in mortality during the interval from larvae to adults, K L-A .This publication has 0 references indexed in Scilit: