西花蓟马对蔬菜寄主的选择性  

Selectivity of Frankliniella occidentalis to vegetable hosts

作　　者：袁成明[1] 郅军锐[1] 曹宇[1] 马恒[1] 

机构地区：[1]贵州大学昆虫研究所,贵州山地农业病虫害重点实验室,贵阳550025

出　　处：《生态学报》2011年第6期1720-1726,共7页Acta Ecologica Sinica

基　　金：贵州省优秀科技教育人才省长专项资金项目(黔省专合字(2007)20号);公益性行业专项“外来入侵害虫西花蓟马防控技术研究与示范”(20080325);国家自然科学基金(31060244)

摘　　要：通过西花蓟马在田间不同蔬菜上的种群数量、在室内对不同蔬菜的自由选择和不同蔬菜对西花蓟马生长发育和繁殖的影响等方面,研究了西花蓟马对蔬菜寄主的选择性。结果表明西花蓟马在田间可危害24种蔬菜,但在不同蔬菜上种群数量差异很大,存在明显的寄主选择性,对黄瓜、四季豆、茄子、萝卜和香菜的嗜食度很高,为最适宜寄主,而对番茄、蒜、芹菜等11种蔬菜的嗜食度较低,为非适宜寄主。西花蓟马在室内的自由选择结果表明西花蓟马在7种不同蔬菜上着落的成虫数量和产卵量不同,其选择性为黄瓜>四季豆>茄子>莴苣>甘蓝>芹菜>蒜。不同蔬菜对西花蓟马的发育历期和产卵量有明显的影响,西花蓟马在黄瓜上发育最快,在四季豆上产卵量最高。西花蓟马对蔬菜寄主的选择性在田间的调查结果和室内实验结果基本一致。Western flower thrip,Frankliniella occidentalis,is one of the most serious pests in vegetable production worldwide.Its damage to crop production results from direct feeding as well as serving as a vector of plant viruses.F.occidentalis invaded China in 2003,and now has been reported in several provinces of the country.F.occidentalis is a polyphagous species with more than 500 plant species belonging to 62 different families.It is reported that there are significant differences at the selectivity of F.occidentalis on host plants.However,the selectivity of F.occidentalis has not yet been studied in China.In this paper,the host selectivity of F.occidentalis was studied through the field investigations,the indoor free choice tests,as well as the research on the effect of different vegetables on the development and fecundity of the insects. The field investigations showed that F.occidentalis could occur on 24 kinds of vegetables with quite various populations,indicating that F.occidentalis had obvious preference behaviors in host selection.The fitness of host plants to F.occidentalis was quantitatively measured with selective index（I） and preference index（P）.The selective index was the biggest,the value of 1,for 9 vegetables,such as kidney bean,radish,cucumber,and eggplant,and the lowest selective index was 0.2 for celery.The preference indexes were different among host plants too,with the biggest value 0.8 for kidney bean,and lowest on water spinach.According to the indexes,the host plants of F.occidentalis may be categorized into 4 groups,（1） the most favorite hosts,such as kidney bean,eggplant,cucumber,radish and coriander;（2） favorite hosts,such as hyacinth bean,soybean,lettuce and sponge gourd;（3） secondary favorite hosts,including cowpea,broad bean,pepper and amaranth;and（4） non-favorite host,such as tomato,garlic and celery.There was an obvious linear relation between P and I,with the regression equation of P = 0.7937I-0.2734.The indoor free choice tests showed that the number of adults

关 键 词：西花蓟马 蔬菜 寄主 选择性 

分 类 号：S436.3[农业科学—农业昆虫与害虫防治]