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贵州省毕节地区是黔西北的高寒山区,平均海拔1500公尺左右。粘虫是本区粮食作物的主要害虫,为第二代多发区。近几年来我们对粘虫寄生性天敌昆虫做了一些调查研究,初步了解了天敌昆虫的种类以及它们对粘虫的控制作用,现将结果整理于后。调查方法:从田间分批采集不同世代、不同虫态、不同龄期的粘虫,在室内单个饲养到成虫或寄生昆虫羽化,观察天敌种类、寄生率、羽化日期等。并对粘虫黑卵蜂生物学特性做了一些观察。一、天敌昆虫种类:据调查,在毕节地区粘虫寄生性天敌昆虫有如下种类: 粘虫黑卵蜂Telenomus cirphivorus Liu,广东黑卵蜂T.guangdongensis Chen et Liu,弯尾姬蜂Diadegma sp.,斜纹夜蛾盾脸姬蜂Metopius rufusbrowni(Ashmead),
Bijie Prefecture, Guizhou Province, is an alpine mountainous area in northwestern Guizhou with an average altitude of 1,500 meters. Mythimna separata is the major pest of food crops in the area and is the second generation of multiple-onset areas. In recent years, we conducted some investigations on the parasitic natural enemies of armyworms, and studied the types of natural enemies and their control effects on armyworms. The results are now compiled. Methods of investigation: The armyworms of different generations, different insect states and different ages were collected in batches from the field, and were individually reared into adult or parasitic insects in the house to observe the types of natural enemies, the parasitism rate and the emergence date. Some observations were made on the biological characteristics of Mythimna separata. First, the natural enemy insect species: According to the survey, armyworms in Bijie parasitic natural enemies insects have the following species: armyworm black egg bee Telenomus cirphivorus Liu, Guangdong black egg bee T.guangdongensis Chen et Liu, Bentley bee Diadegma sp., Spodoptera litura Metopius rufusbrowni (Ashmead),