【摘要】 山西两种主要寄生有害蝇蛹小蜂─丽蝇蛹集金小蜂及东方实蝇蛹俑小蜂，均奇生于蝇蛹内致蛹死亡。成熟蝇蛆一般钻入地下化蛹。笔者从不同基质和不同厚度来观察小蜂寻找寄主的行为。结果发现，在发酵后麦麸内蝇蛹两种小蜂均能寄生，泥土内仅东方实蝇蛹俩小蜂能寄生，且寄生率高，厚度为１、３、５ｃｍ；在１ｃｍ厚的河沙内，东方实蝇蛹俑小蜂亦能钻入产卵寄生更多还原

【Abstract】 This paper reports the penetrating energy to seek hosts of the Nasonia vitripennis and Spalangia endius by using matrix such as soil,sand, dry wheat bran and ferment wheat bran.N.vitripennis can only penetrate 1 cm of ferment wheat bran to seek and parasitize the housefly pupae.S.endius can penetrate 1,3, 5 cm of soil and ferment wheat bran and 1 cm of sand to seek and parasitize the housefly pupae. The soil is the favourite matrix for S,endius to seek the hosts.更多还原