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Parasitism of Helicoverpa assulta Guenee (Lepidoptera : Noctuidae) eggs by Trichogramma spp. (Hymenoptera : Trichogrammatidae): Implications for inundative release on tobacco plants

文献类型： 外文期刊

作者： Hou, Maolin 1 ; Wang, Fulian 1 ; Wan, Fanghao 1 ; Zhang, Fan 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100081, Peoples R China; Yangtze Univ, Coll Agr, Jinzhou 434025, Peoples R China; Beijing Acad Agr & Forestry Sci, Inst Plant Protect & Environm Protect, Beijing 100089, Peoples R China

关键词： egg parasitoids;host preference;age preference;host plant;tobacco budworm

期刊名称：APPLIED ENTOMOLOGY AND ZOOLOGY （ 影响因子：1.403； 五年影响因子：1.381 ）

ISSN： 0003-6862

年卷期： 2006 年 41 卷 4 期

页码：

收录情况： SCI

摘要： To screen effective Trichogramma species or strains and to characterize their parasitism against Helicoverpa assulta eggs, parasitism by T dendrolimi and T chilonis was compared in glass tube and cage tests, and the effects of host egg age and location, and plant species were investigated. In the glass tube test, HJS and YYS strains of T dendrolimi, and JDM and GGM strains of T chilonis parasitized 72.2-97.6% of host eggs. In the mesh cage test, the JDM strain parasitized the highest (60.1 +/- 24.9%) and the GGM strain, the lowest (39.4 +/- 28.6%) level of host eggs. Host egg age showed significant influence on parasitism, and HJS, YYS and JDM strains all preferred 0-12 h to 12-36 h host eggs. The wasps parasitized significantly more host eggs on lower than on upper and bottom leaves, and a higher proportion of host eggs on the leaf upper side than on the lower side regardless of plant height, which contrasted to egg deposition by H. assulta. On pepper plants, parasitism by T dendrolimi and T chilonis was 31.1 +/- 13.9% and 32.8 +/- 10.2%, respectively, while on tobacco plants, it was 10.6 +/- 4.6% and 1.1 +/- 0.8%, respectively. The implications of these results are discussed with reference to inundative release.

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