Population suppression of Bemisia tabaci (Hemiptera : Aleyrodidae) using yellow sticky traps and Eretmocerus nr. rajasthanicus (Hymenoptera : Aphelinidae) on tomato plants in greenhouses
文献类型: 外文期刊
第一作者: Liu, Tong-Xian
作者: Liu, Tong-Xian;Gu, Xi-Shu;Bu, Wen-Jun;Gu, Xi-Shu;Xu, Wei-Hong;Bai, Yi-Chuan;Liu, Bai-Ming
作者机构:
关键词: greenhouses;parasitoids;physical control;sweetpotato whitefly;yellow sticky cards
期刊名称:INSECT SCIENCE ( 影响因子:3.262; 五年影响因子:3.206 )
ISSN: 1672-9609
年卷期: 2008 年 15 卷 3 期
页码:
收录情况: SCI
摘要: We conducted three experiments for management of Bemisia tabaci (Gennadius) biotype 'B' on tomatoes under greenhouse conditions: (i) vertically placing yellow sticky cards either parallel or perpendicular to tomato rows at a rate of 1 per 3-m row; (ii) releasing Eretmocerus sp. nr. rajasthanicus once at 30 adults/m(2) in the high whitefly density greenhouses (> 10 adults/plant), or twice at 15 adults/m(2) at a 5-day interval in the low whitefly density greenhouses (< 10 adults/plant); and (iii) using combinations of yellow sticky cards that were placed vertically parallel to tomato rows and parasitoids released once at 30/m(2) in high whitefly density greenhouses or twice at 15/m(2) at a 5-day interval in low whitefly density greenhouses. Our data show that yellow sticky cards trapped B. tabaci adults and significantly reduced whitefly populations on tomato. The yellow sticky cards that were placed parallel to tomato rows caught significantly more whitefly adults than those placed perpendicular to tomato rows on every sampling date. In the treatment where parasitoids were released once at 30/m(2) in high whitefly density greenhouses, the number of live whitefly nymphs were reduced from 4.6/leaf to 2.9/leaf in 40 days as compared with those on untreated plants on which live whitefly nymphs increased from 4.4/leaf to 8.9/leaf. In the treatment where parasitoids were released twice at 15/m(2) in low whitefly density greenhouses, the numbers of live nymphs of B. tabaci on tomato leaves were reduced from 2.1/leaf to 1.7/leaf in 20 days as compared with those on untreated plants on which numbers of live nymphs of B. tabaci increased from 2.2/leaf to 4.5/leaf. In the treatment of yellow sticky cards and parasitoid release once at 30/m(2) in high whitefly density greenhouses, the numbers of live nymphs of B. tabaci on tomato leaves were reduced from 7.2/leaf to 1.9/leaf, and in the treatment of yellow sticky cards and parasitoid release twice at 15/m2 at a 5-day interval at low whitefly density, the numbers of live nymphs of B. tabaci on tomato leaves were reduced from 2.5/leaf to 0.8/leaf; whereas the numbers of live nymphs of B. tabaci on untreated plants increased from 4.4/leaf to 8.9/leaf. An integrated program for management of B. tabaci on greenhouse vegetables by using yellow sticky cards, parasitoids and biorational insecticides is discussed.
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