Seasonal population dynamic and within-plant distribution of the whitefly, Aleurotuberculatus takahashi David et Subramaniam (Hom, Aleyrodidae), and its parasitoid, Eretmocerus longipes Compere (Hym, Aphelinidae) in citrus and jasmine plantations in Fuzhou region of the southeastern China
文献类型： 外文期刊
作者： Liu, B 1 ; Sengonca, C 1 ;
作者机构： 1.FUJIAN ACAD AGR SCI,INST PLANT PROTECT,FUJIAN 350003,PEOPLES R CHINA
期刊名称：ANZEIGER FUR SCHADLINGSKUNDE PFLANZENSCHUTZ UMWELTSCHUTZ （ 影响因子：0.195； ）
ISSN： 0340-7330
年卷期： 1997 年 70 卷 5 期
页码：
收录情况： SCI
摘要：
Field investigations on seasonal population dynamic and within-plant distribution of the whitefly Aleurotuberculatus takahashi David et Subramaniam (Hem., Aleyrodidae), and its parasitoid, Eretmocerus longipes Compere (Hym., Aphelinidae) in citrus and jasmine plantations were conducted at Fuzhou, Fujian, PR China in 1996. Population levels of the whitefly and its parasitoid were approximately one times higher on jasmine plantation than on citrus. The seasonal trend of the whitefly parasitization rate on citrus was similar to that on jasmine. Maximum parasitization rates on citrus and jasmine were determined on 30. Sept. valuing 17.5% and 32.0%, respectively. Later in the season this rate gradually dropped gradually down to zero level till the end of sampling period. Populations of A. takahashi and E. longipes were differently distributed in regard to leaf age on citrus and to plant layers on jasmine. A. takahashi was most abundant on youngest citrus leaves (age class I) averaging 14.03 indiv./leaf and on leaves in the top layer of jasmine with 20.02 indiv./leaf, while E. longipes preferred to settle on youngest citrus leaves (age class I) (3.41 indiv./leaf) and on leaves in the middle layer of jasmine (2.95 indiv./leaf). Beside the whitefly population was distributed in a contagious pattern with K>8 on mature citrus leaves (age class III), the whitefly and parasitoid populations displayed an aggregated distribution pattern with O
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