Bionomics of Exorista japonica (Townsend) (Diptera: Tachinidae)
Bionomics of Exorista japonica (Townsend) (Diptera: Tachinidae)
复制标题
Exorista japonica (Townsend) 的生物学特性（双翅目：寄蝇科）
作者：
Li Yang;Li Hui;Y. Shuyan;Yin Zhen;Sun Xugen
对日本驱魔（Exorista japonica, Townsend）进行了生物学观察。结果表明，家蚕对速虫产卵的偏好程度从高到低依次为胸部、头部和腹部。三个部位的产蛋量差异显著。在选择试验中，速虫寄生率分别为62.7%、26.15%和12.33%。对家蚕幼虫的卵数进行了研究。subcarnea和H.cunea分别为5.63、4.05和1.85。5龄、4龄和3龄幼虫的寄生率分别为44.38%、34.67%和21.05%，产卵数分别为9.58、7.95和4.45个。7、6、5幼虫的寄生率分别为53.33%、27.02%和19.67%，卵数分别为7.27、3.17和1.33个。寄主死亡率随卵沉降量的增加而增加。寄存1个卵时，速虫的化蛹率为52%，寄主死亡率为58.33%；寄存2个卵时，速虫化蛹率为69.16%，寄主死亡率为71.67%；在寄主上产卵4粒，化蛹率为76.83%，寄主死亡率为100%。当产卵4个以上时，其化蛹率降低。
Bionomics of Exorista japonica(Townsend) was observed in present study.Results indicated that the rank of preference for oviposition on the tachinid(from high to low) was thorax,head and abdomen of Bombyx mori.Egg deposition on the three parts was significantly different.In choice tests,the tachinid parasitized 62.7% of the larvae of B.mori,26.15% of the larvae of Spilarctia subcarnea and 12.33% of the larvae of Hyphantria cunea.The number of eggs deposited on the larvae of B.mori,S.subcarnea and H.cunea was 5.63,4.05 and 1.85,respectively.Parasitism on the 5th,4th and 3rd instar larvae of B.mori was 44.38%,34.67% and 21.05%,respectively,and the number of deposited eggs was 9.58,7.95 and 4.45,respectively.Parasitism on the 7th,6th larvae and 5th of H.cunea was 53.33%,27.02% and 19.67%,respectively,and the number of eggs was 7.27,3.17 and 1.33,respectively.Host mortality increased with the increase of egg deposition.When one egg was deposited,pupation of tachinid was 52% and host mortality was 58.33%;when two eggs were deposited,pupation of tachinid was 69.16% and host mortality was 71.67%;when 4 eggs were laid on host,pupation of tachnid was 76.83% and host mortality reached 100%.When more than 4 eggs were oviposited,pupation of tachinid reduced.