Abstract
Distance and direction of dispersal were studied through bait-pail catches of marked moths (Carpocapsa pomonella) . Data relative to weather conditions affecting the beginning, peak, and end of the daily flight period were gathered by hourly evening examinations of bait pails and weather instruments. Most moths were captured within five-hundred feet of the liberation point, and showed a slight tendency to seek shelter from prevailing winds. Evening flight began before sunset, reached its peak the hour following, and decreased with complete darkness. Flight occurred below sixty degrees Fahr., and increased with rising temperature. It was prolonged by moonlight and stopped by rain. The data indicate the possible effect of other factors.
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