空气相对湿度对粘虫飞翔活动的影响

THE EFFECT OF RELATIVE HUMIDITY ON FLIGHT ACTIVITY OF ADULT ORIENTAL ARMYWORM

在室内条件下,系统研究了粘虫蛾飞翔活动与湿度的关系。试验结果表明,空气相对湿度对粘虫蛾的飞翔活动具有显著影响,干燥或极端潮湿的条件均不利于粘虫飞翔活动,适宜的空气相对湿度为70％—85％。在蛾龄或温度不同的情况下,湿度对其飞翔活动的影响是一致的。在不同相对湿度下由飞翔活动造成的体重和水分损失随湿度的增加而减少,且蛾龄越低其损耗愈重。另外,根据测试结果讨论了粘虫在自然情况下迁飞时的空间位置等问题。

The relationship between flight activity of adult oriental armyworm Mythimna separata (Walker), a well-known migratory insect pest, and relative humidity (RH) were studied in laboratory. The results showed that the flight activity of adult oriental army-worm was significantly dependant on RH conditions, both dry and too humid were unfavorable and the optimum RH for its flight ranged from 70%-85% , in despite of the different moth ages and temperatures. The consumptions of body weight and moisture content after flight decreased with the increased RH, the more young moth age, the more water loss by flight. In addition, its possible high altitude positioning in natural flight was discussed.