RESEARCHES ON BEHAVIOR OF THE ADULT ANOPLOPHORA NOBILIS GANGLBAUER
Zhou Jia-Xi(North-western College of Forestry)Zhang Ke-Bin (North-western College of Agriculture)Lu Yu-Zhong (Baoji Forest Research Institute)
The larvae of Anoplophora nobilis G. are serious stemborer pest of poplar in shannxi' Gansu and Ningxia Hui Autonomous Region. The adults show slow action and have some regularity, acting by day and resting at night. There are Tow acting peaks during day; one is about 10 a.m, the other is about 6 p. m. Their main actions are taking food, mating and laying eggs. The adults have weakly flying ability, usually only spread to and fro in the woods with the farthest distance within 1190 M. Their action is mainly affected by temperature. Usually they act very well between 16.0℃ and 28.0℃, but the irregularty action will be observed when T is above 32.0℃ or below 10.0℃. The adults prefer to oviposit on the trunks of with d.b.h 7-12cm. The oviposition on the trunk rises with the tree age year by year within difinite sizes of the trund or branch. The adults show some specially preference to bite and oviposit on the cultivars of Section Aigeiros and Section Tacamahaca. The different degrees in resistance were observed in Section Leuce to that pest. The insect also has defibite choice to other tree species grown near villages, canals, road-sides, and buildings, Paulownia and heaven tree appear to be more resistant to the pest. The adult mainly uses its antennae and labialpalpus and other sense organs to accurately choose tree-species. Populus X dakuanensis has some chemical messagematter that attracts the pest to bite and oviposit. Paulownia seems to have some repellency to the insect, The findings provide some theoeretical basis for deeply studying and controlling Anoplophora nobilis, specially for using insectresistant tree-species.
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