齿唇姬蜂对棉铃虫控制作用的研究

Controlling Effect of Campoletis chlorideae on Helicoverpa armigera

调查研究结果表明淮北棉区棉铃虫齿唇姬蜂发生６月上旬至９月上旬共有４～５个高峰，分别在６月中旬、７月初、７月下旬至８月初、８月中下旬至９月上旬。其中较大的峰出现在６月底至７月初、８月底至９月初，对棉铃虫的控制作用较强，不同作物上对棉铃虫的控制作用相差较大，以花生田寄生率最高。不同作物布局类型中以棉花，玉米及花生相间套邻作对该蜂较为有利。蜜源植物对该蜂控制棉铃虫作用有一定影响，在该蜂成虫盛期提供适当的蜜源是增强其作用的有效途径。Ｂｔ及抑太保等生物农药对寄生率没有影响，而化学农药很大程度控制该蜂寄生作用。

Occurrence of Campoletis chlorideae,its control effect on Helicoverpa armigera and some factors influencing its parasiting ratio were investigated in this paper.The results showed that:(1)there were 45 peaks of parasiting ratio from early June to early September in Huaibei cotton area;(2)its parasiting ratio in various crops was very different,and the highest was in peanut;(3)the intercropping of cotton with corn and peanut,and the existance of honey source plants were helpful to its development;(4)application of insectcide was very harmful to the wasp,but Bt and Yitaibao showed no obvious effect on it.