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Effects Of New Technical Controling Monochamus Alternatus On The Community Of Non-target Arthropod

Posted on:2007-06-24Degree:MasterType:Thesis
Country:ChinaCandidate:F LiuFull Text:PDF
GTID:2143360185970136Subject:Agricultural Entomology and Pest Control
Abstract/Summary:PDF Full Text Request
In this study, the community of non-target arthropod in Masson's pine stands was investigated systematically where Monochamus alternatus was controlled by different treatments and the control. All treatments and the control was evaluated by the static and the dynamic analysis of species richness, individual numbers and diversity index and the analysis of community similarity of community, sub- community and function group.Based on the thorough investigation, 261 species belonging to 94 families of 15 orders was found out total 10301 individuals. In which, Lepidoptera, Coleoptera, Hymenoptera, Homoptera, Diptera, Hemiptera and Arancida were dominant groups. And many Isoptera, Hymenoptera And Blattodea insects live in the litter and soil layer. Entomogenous fungi was scarce and mainly distributed in the tree layer and the litter and soil layer.The species numbers individual numbers of non-target arthropod in all treatments and the control were investigated, the results revealed that they were similar, but to the control , the bait tree and Beauveria bassiana band's species numbers, natural enemies species numbers and predatory group species numbers increase 2.10%, 8.82% and 25.93%, the bait tree, attractants and the band's increase 1.26%, 10.78% and 33.33%, and their phytophagous groups decreased. However, the band only's and the attractants and band's were closed to the control.Community's diversity reflects between the community's stability to a certain extent, diversity index is bigger, its feedback system is also stronger, coming from the community interior population undulation cushioning effect regarding the environment change to be stronger. Compared with all treatments and the control's community's diversity indices, discovered treatments'are slightly bigger than the control, especially of the bait tree and band's and the bait tree, attractants and the band's.And compared the non-target arthropod species richness, individual numbers, and the diversity indices of all treatments and the control on the dynamic analysis, the results revealed that all treatments and the control in species richness, individual numbers, and the diversity indices aspects displayed the same change tendency, but the bait tree and band's and the bait tree, attractants and the band's change relaxes, also is bigger than others'in the majority times. Therefore, this two treatments'community structures were stabler and reasonable and ecology effects were more obvious. In order to be clear the community composition and the structure's difference of non-target arthropod between all treatments and the control, calculated and analyzed their similarity, the results revealed that all treatments and the control were similar, the bait tree and band and the bait tree, attractants and the band and the band only and the attractants and band were more similar than others, accounted for 0.9412 and 0.9234. And the sub- community and function group were similar to.The result of controlling Monochamus alternatus showed that, the bait tree and band and the bait tree, attractants and the band displayed remarkable effect on Monochamus alternatus's population, Beauveria bassiana inoculum in forest and oviposition scar number. But they were not significant.In general the bait tree and band and the bait tree, attractants and the band all displayed the superiority not only to control Monochamus alternatus but also to demonstrate ecology effect, the bait tree and band is the best choice for it's economic feasibility and operational easiness.
Keywords/Search Tags:Biological control, Monochamus alternatus, Non-target arthropod, Species richness, Diversity, Similarity
PDF Full Text Request
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