昆虫学报2011，Vol.54Issue(2)：238-245,8.
卷蛾分索赤眼蜂对十字花科蔬菜的行为反应
Behavioral responses of Trichogrammatoidea bactrae Nagaraja ( Hymenoptera: Trichogrammatidae) to cruciferous vegetables
摘要
Abstract
In order to clarify the effects of different volatiles of cmciferous vegetables on the host parasitoid searching behavior of Trichogrammatoidea bactrae Nagaraja, the offactory behavioral responses of T. bactrae to six common species of host plants ( Brassica oleracea, Brassica alboglabra, Brassica juncea, Brassica parachinensis, Raphanus sativus and Nasturtium officinale ) of Plutella xylostella L. and four varieties of Brassica oleracea plants were investigated with Y-robe olfactometer in the laboratory, and the chemical compositions of six intact vegetable volatiles were analyzed by GC-MS. The results indicated that olfactory responses of T. bactrae were influenced not only by the species of cruciferous vegetables, but also by different varieties of the same vegetable. Female wasps were attracted to six intact plants, and the degree of attraction to different species of plants was significantly different ( P ＜ 0.05 ). The female wasps showed the strongest attraction to N. officinale, less attraction to B. oleracea, B. parachinensis and B. juncea, and the least attraction to R. sativus and B. alboglabra. Attractiveness of the undamaged plants of Yashilü variety of B. oleracea to parasitoid was significantly stronger than that of Japan chunxiaqiu variety ( P ＜ 0. O1 ). GCMS results showed that the majority of the six plant volatiles were alkane compounds, the next werealkenes, and others included aldehydes, alcohols, esters, acids, ketones and thiazoles compounds. Five aldehydes compounds (2, 3-dimethyl-benzaldehyde, octanal, nonanal, undecanal, and dodecanal )accounting for 4.90％ of the total volatiles were the unique components from N. officinale. The contents of alkanes (33 kinds) and alcohols (6 kinds) in N. officinale were 47.42％ and 5.66％, respectively,higher than those in other vegetables. Of the six species of vegetables, B. oleracea had the highest contents of alkenes (9 kinds, 5.52％ ) and acids (4 kinds, 12.20％ ). The research may provide a theoretical basis for the reasonable layout of vegetable varieties and screening attractants of parasitic wasps.关键词
卷蛾分索赤眼蜂/小菜蛾/十字花科蔬菜/行为反应/植物挥发物/引诱作用Key words
Trichogrammatoidea bactrae / Plutella xylostella / cruciferous vegetables/ behavioral responses/plant volatiles/ attraction分类
生物科学引用本文复制引用
郭祥令,何余容,王德森,潘飞..卷蛾分索赤眼蜂对十字花科蔬菜的行为反应[J].昆虫学报,2011,54(2):238-245,8.基金项目
国家公益性行业(农业)科研专项(200803001) （农业）
国家自然科学基金项目(30871677) （30871677）
