西花蓟马对3种茄科植物的选择行为

Host Preference of Frankliniella occidentalis to Three Species of Solanaceae Family

利用培养皿法、Y形嗅觉仪法等分别测定西花蓟马(Frankliniella occidentalis)若虫及成虫在茄子、辣椒及番茄3种茄科植物间及同种植物不同处理(健康植物、机械损伤植物、虫伤植物、已虫伤植物)间的选择行为。结果显示:除健康辣椒对西花蓟马成虫无显著的引诱作用外,不同处理的3种茄科植物对西花蓟马成虫都具有显著的引诱作用,而且虫伤植物的引诱活性最大,说明在虫伤植物中存在西花蓟马更嗜好的挥发性物质。不同植物不同处理对西花蓟马成虫的引诱作用有明显的差异。培养皿法测定的西花蓟马若虫在3种植物不同处理的偏好性均是茄子最高,其次为番茄,对辣椒偏好性最差;其中虫伤茄子对西花蓟马若虫的引诱力最强。西花蓟马成虫对健康植物的喜好性与若虫相同,但对虫伤处理与已虫伤处理之间的喜好性没有显著差异。

The dish and ＂Y＂-olfactometer bioassays were used to study the selective behavior of the nymphs and adults of Frankliniella occidentalis to the three species of solanaceae family（eggplant,pepper,tomato） and different treatments（healthy plant,mechanically damaged plant,plant infested by feeding of nymphs of Frankliniella occidentalis,and plant pre-infested by feeding of nymphs of Frankliniella occidentalis） of the same solanaceae.The results revealed that the plants in all the treatments attaracted the nymphs and adult of western flower thrips except healthy pepper for the adult.In addition,plant infested by feeding of nymphs of Frankliniella occidentalis were the most attractive compared with those from other differently treated plants,so there is a kind of volatile for Frankliniella occidentalis in the infested plants.There were obvious differences in attraction of Frankliniella occidentalis in different treatments of different plants.The nymphs of Frankliniella occidentalis showed the highest preference to eggplants,the following was tomato,the last was pepper in the different treatments of the three plants.Eggplants infested by feeding of nymphs of Frankliniella occidentalis were the most attractive.The preference of the adult of Frankliniella occidentalis was the same as