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Exposure of Ephestia Cautella (Wlk.) (Lepidoptera, Phycitidae) to Low Pressures: Effects on Adults


Ministry of Agriculture, Department of Plant Protection, Stored Products Research Laboratory, Jaffa, Israel
(First received 24 January 1972, and injnal form 4 July 1972)

Abstract: Adults of Ephestia cautella (Wlk.) were exposed to pressures of 100, 200, 300, 400 and 760 mm Hg at 26 ± 1°C and 70 ± 5% r.h., in a specially designed apparatus in which a controlled atmospheric gas composition was maintained. Adult life was shortened at all reduced pressures; at 100 mm Hg all adults died in 14 hr. Oviposition was affected at reduced pressures resulting in a significant reduction in the number of eggs laid. At 100 mm Hg oviposition was negligible. A hypothesis to explain these observations is mentioned.

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