Biological Characteristics of Euplectrus laphygmae Ferrière(Hymenoptera:Eulophidae)
Biological Characteristics of Euplectrus laphygmae Ferrière(Hymenoptera:Eulophidae)
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作者：
He Jianyu
本文研究了斜纹夜蛾（Spodoptera litura, Fabricius）幼虫的一种群居性外寄生蜂——浅纹夜蛾（euplecus laphygmae Ferriere）的生物学特性。结果表明，一雌斑姬螨产卵数最多，为139个，实验室平均产卵数为73.69个。斜纹夜蛾雌虫在1只斜纹夜蛾幼虫上产卵1-5枚（有时产卵6-9枚），卵主要产在1-4腹节的背面，较少产在侧面，腹节无卵。斜纹夜蛾主要寄生斜纹夜蛾2、3龄幼虫，对3龄早期幼虫的偏好指数为0.65，从卵到成虫的发育时间为9.93±0.19 d。
The biological characteristics of Euplectrus laphygmae Ferriere, which was a gregarious ectoparasitoid of the larvae Spodoptera litura(Fabricius), were studied in this paper. The results showed that the largest numbers of eggs laid by one female E. laphygmae was 139, and the average numbers was 73.69 in the laboratory. E. laphygmae female laid 1―5 eggs on one individual S. litura larvae(sometimes 6―9 eggs), the eggs were laid on the back of the 1―4 abdominal segments mostly, with fewer on the lateral side and none on the venter. E. laphygmae mostly parasitized the 2nd, 3rd instar larvae of S. litura, in which early 3rd instar larvae were most preferred host, with the preference index was 0.65 and the developmental duration from egg to adult was 9.93±0.19 days.