混交林中黄斑星天牛选择寄主的行为与寄主抗虫性关系的研究

通过观察混交林中黄斑星天牛选择寄主的行为，认为对不同抗生寄主，它选择寄主的行为不同。它能通过复杂的感觉行为和一定的时间找到混交林中的感性树种并造成严重危害和它们种群密度在感性树种上的上升。这种天牛选择寄主在远距离一般以植物气味定向，近距离则以性信息素 增加种群密度。除视觉外，它的主要感觉行为是触角摆和胫节磨擦，选择到达合适寄主是通过逐步的感觉阶段完成的。树皮粗糙程度，叶片特征，枝条特征及混交林密度

STUDY ON THE RELATIONSHIP BETWEEN THE BEHAVIOR OF SELECTING HOST OF ANOPLOPHORA NOBILIS AND HOST RESISTANCE ON THIS BEETLE IN MIXED FOREST

The behavior of selecting|host of %Anoplophora nobilis% was observed and analyzed in mixed forest consisting of 30 species of trees. The results showed that the longhorned beetle varied their selecting|host behavior according to different level of host resistance. The susceptive host trees could be found by a complex, time|consuming and step by step sense behavior of the longhorned beetle and at last were seriously damaged to nearly death. After the susceptive trees were initially infested by a few longhorned beetles, the population of the longhorned beetles infesting susceptive host would fast rise, the reason is that the longhorned beetles were attracted by host odor at long distance and at short distance by intraspecific sex attraction. Besides vision, the main sense behavior was that a pair of antennae often swung and both of front , mid and hind tibiae respectively rubbed each other. The rough degree of bark, the characteristics of leaves, twigs and the density of mixed forest had impact on crawling, flying and inhabiting behavior of the longhorn beetles. %Prunus persica % f. %Duplex, Toona sinensis, Robinia pseudoacacia, Hibiscus syriacus, Ligustrum lucidum, Sophora rubriflora% could supply diet and attract the longhorn beetles by their odor, but mating and ovipositing behavior were not found on these hosts. The main function of these trees in mixed forest was proved to be prolonging the time that the beetles selected host and curbed the population of the longhorn beetles on the susceptive hosts. %Platycladus orientalis, Syringa oblats, Prunus yedoensis% also had strong attraction, but the longhorn beetle would not feed on them. So the proportion of all of the trees mentioned above should be increased and the susceptive trees should be used as trap trees when reforesting new mixed forest for resisting the longhorn beetles in North China.