The Preliminary Study On Micro-habitats Of Incisions By Anoplophora Glabripennis (Motsch.)

The research was conducted on the incisions by Anoplophora glabripennis (Mostch.) on Salix matsudana Koidz. in Beijing, Populus opera Hsu, Populus bolleana Lanche, Ulmus pumila Tang et Hao and Elaeagnus angustifolia Linn, in Ningxia Hui Autonomous Region. By investigating the rate of vacancy, incubation and survival of incisions, biological factors and abiotic factors (moisture and pH) were studied. Basic rules of these micro-ecological factors on the different trees were discussed preliminarily.The isolated fungi were designated as 24 genera. Among them, 17 genera were identified as Moniliaceae, 3 genera as Dematiaceae, 2 genera as Tuberculariaceae, 1 genus as Botryosphaeriaceae. The left fungi were not identified. Among the isolated bacteria, 1 genus was identified as Xanthomonas, and the rest were not still identified.In the same area, the microbe species isolated from the different incisions have similarity to some extent. Meanwhile, there exists some territorial difference between the microbe species which were from the different areas. The isolated frequencies of the microbes were different on the different trees in the different regions. Concretely, the fungi obtained from S". matsudana were designated as 9 genera and the predominant microbes were Oospora spp., which frequencies were 18.75%. The fungi isolated from P. opera belonged to 9 genera, the bacteria as 3 genera, and the predominant fungi were Chromsporium spp. and Penicillium spp., which frequencies were 14.42%. The obtained fungi from P. bolleana, U. pumila and E. angustifolia respectively were designated as 9, 7, 11 genera and the bacteria as 3, 2, 2 genera. Their predominant microbes were Penicillium spp. of 22.86%, Chromsporium spp.of 19.40% and Penicillium spp. of 18.43% respectively.The obtained fungi and bacteria from the healthy trees were identified as 10 genera including Coccospora spp., Chromsporium spp. and Xanthomonas spp., and the isolated fungi from the man-made incisions as 11 genera belonging to Alternaria spp., Diplosporium spp., Fusarium spp. and Sporotrichum spp..It was also found that except the P. bolleana, the moisture of the phloem of the other three trees were higher than the healthy ones in Ningxia. Comparing the real incisions with the controls, the moisture of controls were higher than those of the real ones, but it's opposite on E. angustifolia. The reason maybe the natural damage is probably more serious than that of the man-made or the natural damage has some unknown stronger induced influence to the trees.Furthermore, except P. bolleana, the pH of the phloem of the others after damaged were higher than the healthy ones in Ningxia. The pH of the control incisions is lower than the corresponding real ones. The reason probably is the incisive micro-habitats are appropriate to the acid-producing micro-organism.The study will be the base of the further research of the relationship between the micro-ecological factors and the population dynamics during the period of oviposition and larva. The exploration of the latent natural enemy resources of A. glabripennis will benefit from the study.