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Rearing the cranberry girdler Chrysoteuchia topiaria on reed canary grass Phalaris arundinacea


, : Rearing the cranberry girdler Chrysoteuchia topiaria on reed canary grass Phalaris arundinacea. Journal of the Entomological Society of British Columbia 98: 211-215, December

We report a method of rearing cranberry girdler Chrysoteuchia topiaria (Zeller), a pyralid that is a serious pest of cranberry Vaccinium macrocarpon Aiton. Fertile eggs from field-caught females were scattered on reed canary grass Phalaris arundinacea L. planted in greenhouse flats (50 eggs/flat) kept under fluorescent lights at 16L:8D and temperatures of 22-30degreeC (day): 19-24degreeC (night). Under these conditions, survival from egg to adult was 28%. Progeny of these adults entered diapause after exposure to low light (ca. 0.5 lux) as larvae. Diapause was broken by placing insects in the dark at 4.5-5.5degreeC for ca. 3 months, but survival was very poor (8% from egg to adult).

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