Native parasites of the larch casebearer, <i>Coleophora laricella</i> (Lepidoptera: Coleophoridae), in the West Kootenay area of British Columbia
Keywords:
parasites, larch casebearer, <i>Bracon pygmaeus</i>, <i>Spilchalcis albifrons</i>, <i>Dicladocerus</i>, <i>Coleophora laricella</i>, Lepidoptera, ColeophoridaeAbstract
Thirty-two species of parasites and hyperparasites were reared in 1973 from a total of almost 103.000 larch casebearers, <i>Coleophora laricella</i> (Hbn.) collected at eight locations in the West Kootenay area of British Columbia. The two highest casebearer populations were at Fruitvale and Shoreacres. with densities of 150 and 130 cases per 100 fascicles respectively. The highest incidence of parasitism was 17.7% at Rossland. where the host density was just under 100 cases per 100 fascicles. The <i>Dicladocerus</i> spp. complex comprised 40.7% of the total parasitism and was most abundant at Rossland, Arrow Creek. Christina Lake, Sheep's Creek. and Yahk; <i>Spilchalcis albifrons</i> (Walsh) comprised 23.6% of the total and was the most abundant parasite at Shoreacres, Christina Lake, and Fruitvale; and <i>Bracon pygmaeus</i> (Prov.) comprised 6.8% of the total and was the most abundant parasite at Anarchist Summit.References
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