释放白蛾周氏啮小蜂生物防治美国白蛾试验

Biological prevention and control of Hyphantria cunea by release of Chouioia cunea

开展了释放白蛾周氏啮小蜂生物防治美国白蛾试验,结果表明:第1代美国白蛾老熟幼虫期和化蛹盛期分别为6月19,23日,第2代分别为7月30日、8月2日;释放孕蜂蛹60枚/hm2的防治效果较好,可达52.5%;繁育的孕蜂蛹在18-20℃时羽化出蜂受到显著抑制,从而避开阴雨天气的影响。

The biological control test of Hyphantria cunea by release of Chouioia cunea was carried out. Results showed that the first generation H. cunea mature larvae period and pupation peak period began on June 19 and 23 respectively, the 2nd generation respectively on July 30, August 2. The control rate could reach up to 52. 5% by release of 60 Chouioia cunea pa- ratizing Tussah papae per hmz. The eclosion and emergence of C. cunea paratized in Tussah papae could be restrained under 18-20 ℃ temperature in order to avoid the negative influence of overcast and rainy weather.