拟澳洲赤眼蜂和短管赤眼蜂在米蛾卵上的种间竞争

编号 zgly0000357244

文献类型 期刊论文

文献题名 拟澳洲赤眼蜂和短管赤眼蜂在米蛾卵上的种间竞争

作者 何余容  吕利华  陈科伟 

作者单位 华南农业大学昆虫生态室  广东省农业科学院植物保护研究所 

母体文献 应用生态学报 

年卷期 2004,15(12)

页码 2401-2404

年份 2004 

分类号 S436.3  S476.3 

关键词 拟澳洲赤眼蜂  短管赤眼蜂  米蛾  卵  种间竞争  小菜蛾  蔬菜害虫 

文摘内容 By means of single and mixed inoculation, this paper studied the interspecific competition between T. confusum and T. pretiosum on the factitious eggs of Corcyra cephaloica under different parasitoid densities, host densities and inoculated spaces. The results showed that for both singly and mixed inoculated groups, the parasitism increased with parasitoid density but decreased with host density, whereas the percentage of female progeny dropped with parasitoid density but enhanced with host density. No significant effect was observed on adult emergence for all parasitoid and host density treatments. In mixed inoculated group, the proportion of T. pretiosum in the progeny decreased with parasitoid density but increased with host density, and was more than 50% in all treatments, indicating that T. pretiosum had a stronger competitive ability than T. confusum. In the spaces ranging from 4cm^3 to 102cm^3, the parasitism decreased gradually in both singly and mixed inoculated groups. The percentage of female progeny and adult emergence had no significant difference among different inoculated spaces. In mixed inoculated group, the proportion of T. pretiosum in the progeny was more than 50% in all treatments except space 102 cm3, but decreased with space, which suggested that T. confusum could improve their competitive ability through increasing their search areas and looking for more hosts。