Mating Success of the European Corn Borer, Ostrinia rubilalis,1 as Influenced by Environmental Factors2

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Abstract
Decreasing temperature within the range 29.4 to 19.4°C and decreasing light intensity within the range 250 to 0 ft-c serve as the exogenous synchronizers for mating by the European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Pyralidae). At light intensities below 100 ft-c, cycling temperature influences mating more than does light. A linear relationship is shown to exist between temperature drop and mating frequency within a temperature range of 30 to 21.2°C. Wind in excess of 10 mph inhibited mating, while a wind speed of 3 mph had no effect on mating. Mating was inhibited by full moonlight. Low humidity decreased mating frequency.

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