关键词: 星天牛, 苦楝, 诱饵树, 化学成分, 防治

Abstract:

The experimental results showed that the bead tree (Melia azedarach.) had strong alluring ability to the adult of the long-horned beetle Anoplophora chinensis.The alluring distance was over 200m,and the number of the beetle allured in June and July accounted for 71.6% in the whole alluring period,the time for the beetle to take food,have rest and mate in the tree was 2～7 h once.Setting up alluring tree should be on sides of ventilate and sunny forest road or in forest windows with a less crown density.The forest horder having a certain distance from the host plant is better.Alluring the adult beetle with filter paper and block alluring core made of extractives from leaves and twigs of Melia azedarach L.soaked in 5 solvents.It was showed that toluene,acetone,ethanol were better than the other two solvents,especially the toluene with which the time of a single adult beetle biting alluring core was up to 37min 46s,and adult male showed blowing action.Through the test by infra-red instrument and analysis of alluring effect,it was supposed that the active alluring compositions in bead tree would be compounds of alcoholates and aromatics.In forest stands the control of the adult beetles with chemical insecticide indicated that 8% “green mine”at 300× dilution at 25 days after treatment had the best effect.It was better of 15 days after treatment if at 400×dilution of 50% methamidonhos or at 400×dilution of omethoate.

Key words: Anoplophora chinensis, Melia azedarach., Alluring tree, Chemical composition, Control