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Release of Eretmocerus longipes Compere (Hymenoptera : Aphelinidae) against Aleurotuberculatus takahashi David et Subramaniam (Homoptera : Aleyrodidae) on jasmine plantations in the Fuzhou region of southeastern China

文献类型： 外文期刊

作者： Sengonca, C 1 ; Liu, B 2 ;

作者机构： 1.Univ Bonn, Inst Phytopathol, D-53115 Bonn, Germany

2.Fujian Acad Agr Sci, Inst Plant Protect, Fuzhou 350003, Peoples R China

关键词： Aleurotuberculatus takahashi;Eretmocerus longipes;biological control;parasitoid release;population dynamics

期刊名称：ZEITSCHRIFT FUR PFLANZENKRANKHEITEN UND PFLANZENSCHUTZ-JOURNAL OF PLANT DISEASES AND PROTECTION （ 影响因子：0.373； 五年影响因子：0.268 ）

ISSN： 0340-8159

年卷期： 1998 年 105 卷 5 期

页码：

收录情况： SCI

摘要： The field release of the parasitoid, Eretmocerus longipes Compere (Hymenoptera: Aphelinidae) against the whitefly, Aleurotuberculatus takahashi David et Subramaniam (Homoptera: Aleyrodidae), was conducted in comparison with an insecticide application and untreated sites on jasmine plantations in the Fuzhou region of southeastern China in 1997. The results showed that after release of the parasitoid in early April the whitefly population was significantly suppressed by the parasitoid, with the population decreasing at rates of 24.9 % in the first peak in mid May, 48.3 % in the second peak in late September and 77.5 % at the end of sampling in late October, compared with the population at the untreated site. The release for each plot of 6 m in row and 6 m in column of about 1000 parasitoids on 10 leaves (rotal 36 plots with 36000 parasitoids) significantly increased the population levels off. longipes ranging from 210 ind./10 leaves in the first peak in mid June, 11.1 times as high as that with 19 ind./10 leaves in the untreated site and 35.0 times as high as that with 6 ind./10 leaves in the insecticide application site, to 187 ind./10 leaves in the second peak in late October, 3.0 times as high as that with 62 ind./10 leaves in the untreated site and 8.9 times as high as chat with 21 ind./10 leaves in the insecticide application site. The biotic and abiotic mortality factors of the whitefly were tested by means of age-specific life tables and are discussed in the paper. It is suggested that an increase in the parasitoid population level can be achieved by artificial releases of E. longipes in the early season of a year to result in a successful biological control of the whitefly.

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