板栗雪片象成虫夏季活动习性研究

Habits of Niphades castanea Chao adult in summer

采用自然调查与对比试验相结合的方法研究不同气温和光照对板栗雪片象Niphades castanea Chao成虫活动的影响,探明其在夏季的活动规律。结果表明:6月15日后,白天阴天时板栗雪片象成虫主要在树冠上活动,而白天晴天时则大多爬行到相对凉爽黑暗的地表躲藏,躲藏处的温度比非躲藏处地面温度平均低1.21℃;晴天时树冠虫口密度比阴天时减少97.55%,晴天地表虫口密度是阴天的30倍。根据该虫的夏季活动习性,可设置含有相对凉爽黑暗腔室的诱捕器具诱杀该虫,为生产提供一种绿色防控害虫的物理方法。

To investigate the activities of Niphades castanea Chao adults in summer,we studied the effects of different temperatures and light intensity on N.castanea adults in summer by field investigation combined with comparative experiments.The results showed that after June 15 th,N.castanea adults mainly lived in the canopy when the weather was cloudy during the day,while most of them left the canopy to crawl to relatively cool and dark ground to hide in sunny days.The temperature at hidden place was 1.21℃ lower than the surface temperature of the non-hidden places on average.In sunny days,the density of N.castanea adults in the canopy was 97.55% lower than those in cloudy days,and the density of the surface insects in sunny days was 30 times higher than those in cloudy days.According to the activities of N.castanea adults,trapping tools with cool and dark chambers could be designed to trap and kill them,which would provide a green physical control method against N.castanea adults to improve chestnut production.