Abstract
Two methods of assessing II-instar budworm populations in hibernacula are presented and a general comparison shows that the collection of foliage samples in the spring and sampling the whole branch as a unit is an acceptable technique. This population assessment permits the partitioning of the total population reduction from the I- to the III-instar larval stage into I-instar dispersal loss in the fall and II-instar dispersal loss in the spring. Estimates of these losses are presented and other mortality factors in operation during this age-interval are discussed.
Publisher
Canadian Science Publishing
Subject
Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Cited by
73 articles.
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