Biology and adult variability in an Oregon population of Leptarctiacaliforniae (Walker) (Lepidoptera: Arctiidae) Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/rf55zc263

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  • Leptarctia californiae (Walker) was studied on clear and semi-forested southern slopes in the Coast Range Mountains of Benton County, Oregon. The spring of 1965 had an unusually long warm period (21 days) resulting in adult emergence approximately 25 days earlier than in the cooler spring of 1966. Peak flight activity occurred between 12:00 noon and 3:00 p.m. PST. Pheromone emission by females appeared to be the mechanism of male attraction. Larval developmental time in the laboratory (65-80°F) required approximately 60 days, which was 60 per cent longer than development under field conditions. First, second, and third instar larvae fed both day and night on low growing plants while fourth and fifth instars fad nocturnally on other plant species up to 18 inches above ground level. Dorsal hind wing colors in both males and females are black on black and yellow. In addition, females also have combinations of black with yellow- orange, orange, or red.
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  • File scanned at 300 ppi using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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