摘要
Abstract
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.关键词
日本追寄蝇/美国白蛾/家蚕/人纹污灯蛾/寄生比率Key words
Exorista japonica/Hyphantria cunea/Bombyx mori/Spilarctia subcarnea/parasitism分类
农业科技
