黑绒金龟成虫虫体研磨物水悬液对其成虫的驱避作用

黑绒金龟Serica orientalis(Motschulsky)]是一种重要的多食性林木食叶害虫,严重影响苹果、核桃和卫矛等经济和绿化树种的经济和生态效益。为研究黑绒金龟成虫虫体研磨物水悬液对其成虫的驱避作用,探索经济有效、环境友好的黑绒金龟行为控制技术,利用Y-型嗅觉仪测定了黑绒金龟对4种不同寄主植物卫矛Euonymus alatus(Thunb.)Sieb.、苹果Malus pumila Mill.、箭杆杨Populus nigra var.thevestina(Dode)Bean、白梨Pyrus bretschneideri Rehd.]的趋性,以及不同寄主喷施其成虫虫体研磨物水悬液前后黑绒金龟的趋性差异。结果表明:雌、雄成虫对不同寄主的反应率,以及不同寄主对雌、雄成虫的诱引率和驱避率无显著差异(P0.05)。黑绒金龟对卫矛、苹果、箭杆杨和白梨均有极显著的正趋性(P0.01);对卫矛、苹果、白梨的趋性无显著差异(P0.05)。在4种寄主植物嫩枝叶上喷施黑绒金龟成虫虫体研磨物水悬液,以相应寄主嫩枝叶作为对照,比较对黑绒金龟的诱引率,发现黑绒金龟成虫虫体研磨物水悬液对黑绒金龟成虫有极显著的驱避作用(P0.01),黑绒金龟成虫的不反应率高于40%。研究结果可为害虫自身研磨物作为忌避剂应用于农、林业生产提供行为学依据。

Repellent Effect of Adult Serica orientalis (Motschulsky) Homogenates on Its Adult

Serica orientalis (Motschulsky) is an important forest defoliator of various hosts, and a serious threat to economically important species of fruit and ornamental trees, like apple, nut and winged spindle tree, etc.. In order to explore economically and environmental friendly behavioral control technology, this paper studied on the repellency of S. orientalis adult homogenates among 4 different host plants Euonymus alatus (Thunb.) Sieb, Malus pumila Mill., Populus nigra var. thevestina (Dode) Bean, Pyrus bretschneideri Rehd.] using a Y-tube olfactometer. The results showed that there were no significant differences (P>0.05) in response rates to different hosts between male and female adults; neither between attractant rates and repellent rates of different hosts to male and female adults. Both male and female S. orientalis displayed similar and highly significant positive tropism to Euonymus alatus, Pyrus bretschneideri and Malus pumila relative to blank controls (P<0.01). While there were no significant differences (P>0.05) in the attraction and repulsion of S. orientalis to these trees in pairwise comparisons. Application of S. orientalis adult homogenates on the 4 species of host plants′ young branches and leaves resulted in highly significant negative taxis (P<0.01) of S. orientalis to those young branches and leaves, and the number of adults that were non-selective for any host plant was higher than 40%. These results provided a behavioral basis for using these homogenates as repellents in agricultural and forestry production.