【摘要】 采用不定期随机取样的方式,连续3年对桑螟绒茧蜂的自然寄生率进行了调查。结果表明,桑螟绒茧蜂在苏州一带的发生十分普遍,其自然寄生率为22.95%～55.41%,平均为33.99%,全年各代都处于相对较高的水平,其中9月份第5代的自然寄生率最高,达55.41%,是当地的优势天敌种群,对于桑螟的发生与危害具有明显的控制作用。本文报道了桑螟绒茧蜂的自然寄生情况及成虫的生物学特性,特别是成虫的产卵习性和孤雌生殖现象,为进一步开展桑螟的生物防治奠定了基础。更多还原

【Abstract】 Apanteles heterusiae is the natural enemy insect that live in the larva of Diaphania pyloalis Walker.Its parasitical rate is very high is Suzhou region.Apanteles heterusiae is the preponderant natural enemy species and control the occurrence and the damage of Diaphania pyloalis Walker markedly.This paper reported the natural parasitical instance and the biological characteristic of the adult,the lay eggs habit and the parthenogenesis,established a foundation for the biological control.更多还原