桃蛀果蛾Carposina sasakii及其寄生蜂滞育后发育研究

室内条件下,研究了不同寄主植物卜桃蛀果蛾Carposina sasakii Matsumura寄牛蜂种类、寄生率以及温度对苹果桃蛀果蛾及其寄生蜂章氏小甲腹茧蜂Chelonus(Microchelonus)zhangi滞育后发育的影响.结果表明,章氏小甲腹茧蜂寄生于苹果、枣、酸枣和山楂上的桃蛀果蛾;中国齿腿姬蜂Pristomerus chinensis Ashmead寄生于枣、酸枣和山楂上的桃蛀果蛾;杏寄主卜未发现寄生蜂.不同寄主植物上的寄生率差异显著,其中章氏小甲腹茧蜂在苹果桃蛀果蛾的寄生率最高,为16.45%,住山楂桃蛀果蛾的寄牛率最低,为1.58%;中国齿腿姬蜂在酸枣桃蛀果蛾的寄生率最高,为5.05%,在山楂桃蛀果蛾寄牛率最低,为1.09%.苹果桃蛀果蛾及章氏小甲腹茧蜂越冬幼虫开始发育至成虫羽化阶段的发育起点温度分别为7.27℃和10.96℃,有效积温分别为208.86DD和166.73DD.

Post-diapause development of Carposina sasakii Matsumura and its parasitoids

The parasitoids and parasitized percentage of Carposina sasakii Matsumura over - wintered larvae from different host plants, such as apricot, apple, jujuba, wild jujuba and hawthorn, were examined in the laboratory. The results showed that the parasitoid wasps and parasitized percentage differed distinctively. No parasitoid wasp was found from apricot; Chelonus ( Microchelonus) zhangi e-merged from apple; Chelonus (Microchelonus) zhangi and Pristomerus chinensis Ashmead were found from jujuba, wild jujuba and hawthorn. Parasitized percentage of Chelonus (Microchelonus) zhangi from apple, jujuba, wild jujuba and hawthorn were significantly different, being 16. 54% , 12. 85% , 7. 34% and 1. 58% , respectively. Parasitized percentage of Pristomerus chinensis from jujuba, wild jujuba and hawthorn had significant difference, with the highest from apple as 5. 05 % , and the lowest from hawthorn as 1. 09 % . Developmental threshold and thermal constant of the period from early development of over - wintered larvae to adult emergence of Carposina sasakii and its parasitoid wasp from apple were measured under constant temperature. The results showed that developmental threshold were 7. 27℃ and 10. 96℃ and thermal constant were 208. 86DD and 166. 73DD in Carposina sasakii and Chelonus (Microchelonus) zhangi, respectively.