Rice Water Weevil (Coleoptera: Curculionidae) Indirect Flight Muscle Development and Spring Emergence in Response to Temperature

Abstract
Overwintering rice water weevils, Lissorhoptrus oryzophilus Kuschel, were held at different temperatures with and without food to determine the response of indirect flight muscle regeneration. Flight muscle regeneration has a temperature threshold of ca. 18°C. The rate of regeneration is greater at higher temperatures and when adults feed. Emergence of adult weevils from overwintering sites was monitored with sticky traps for 4 years near Stuttgart, Ark., and for 2 years near Crowley, La. The date adults emerged in the spring is closely related to springtime temperatures.

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