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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
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Your Position :Home->Past Journals Catalog->2013年50 No.6

Population dynamics and spatial distribution of thrips on vegetables flowers
Author of the article:JIANG XingChuan1**LI ZhiHua1**CAO ZhiYong2HE ShuQi1LI ZhengYue1 LIU JianYe1GUI FuRong1***
Author's Workplace:1. Key Laboratory for Agricultural Biodiversity and Pest Management of Ministry of Education, College of Plant Protection, Yunnan Agricultural University, Kunming650201, China;2. College of Basic Science and Information Engineering,Yunnan Agricultural University, Kunming650201, China
Key Words:thrips, population dynamics, spatial distribution, aggregating distribution, dominant species
Abstract:The western flower thrip, Frankliniella occidentalis (Pergande), is an invasive insect pest that currently occurs in several Chinese provinces where it causes serious economic loss. There have been only few studies on the population dynamics, spatial distribution and dominant species of thrips after invasion by F. occidentalis. We investigated the population dynamics and spatial distribution of thrips on vegetable flowers in the suburbs of Kunming in 2012. Our results show that four species of thrips, F. occidentalis, F. intonsa (Trybom), Thrips palmi (Karny) and Megalurothrips distalis (Karny) were the main thrip species on vegetable flowers. The dominant species differed on different vegetables. The dominant thrip species on pepper and crowndaisy chrysanthemum was F. occidentalis, whereas F. intonsa, T. palmi, M. distalis were dominant on fragrantflowered garlic, eggplant and kidney beans, respectively. Thrip populations increased rapidly when the plant flowering period started, peaking during the blooming stage. The highest density of thrip adults was found on eggplant flowers (14.93 individuals/flower). Spatial distribution was tested with an aggregation index, the results of which show that adult thrips on vegetable flowers became progressively more aggregated with increasing density. Results of the present study may provide information for the study of competitive mechanisms between local thrips and the invasive F. occidentalis, and lay a foundation for the integrated pest management of F. occidentalis.
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