Study On Dynamics Of Arthropod In The Pleurotus Ostreatus Cultivation With Raw Material And Discussion In IPM

The pleurotus ostreatus is one of important industries in national economy, being known as higher nutrition, remarkable benefit, which production is lower than the cotton and kapok, the oil, the fruit, the vegetable and the period of output is short. However, during pleurotus ostreatus development in local industry, spreading pests led by various factors had a bad effect on its output and quality, which caused the large economical losses to the peasants.At the meantime, traditional pest management based on chemical control not only affected its appearance causing pesticide residue and the environmental pollution, but also can't control pest's quantity stably, continually. Therefore, this research will provide important theories and practical value for IPM of pleurotus ostreatus .In order to improve IPM efficiency of pleurotus ostreatus, the traits of Arthropod community is the basical research .This paper pleurotus ostreatus, investigated and analyzed its traits, providing the theory basis for IPM of pleurotus ostreatus. The result as follows:(1) In this study, the arthropod total community was divided into three sub-communities: natural enemies' sub-community and mushroom Pests arthropod sub-community. Components of the communities were analyzed by a number of groups, individual numbers and some other ecological indexes and so on. Arthropods belonged to 13 species of 32 families, mushroom Pests arthropod sub-community was prominent to total community, its relative abundance was 0.8948 and that of natural enemies' sub-community was 0.1055.Dominant concentration, dominance and the diversities indexes of every community was compared and the orders of dominant concentration and dominance as follows: mushroom Pests arthropod sub-community >total community >natural enemies' community;diversity index was on the other way round: natural enemies' community>total community> mushroom Pests arthropodsub-community(2) The dynamics of the total community's structure fluctuated from time to time. The individual numbers changed with a single peak while the tendency of multiple index showed the state- saddle .The regulations of the sub-communities were consistent with those of the total community including the individual numbers and the number of group which indicated that it had the largest effect on the total communites.But there were obvious differences between the enemies' community and the total community, mushroom pests sub-community whose changes (the numbers of species and the individual numbers ) took on the shape -mountain .At the meanwhile the time of three peaks are rightly the period of the mushroom high peak-production .(3) Cluster analysis and the optimization cut apart on pleurotus ostreatus arthropod total community, the result as follows: the community of pleurotus ostreatus in greenhouse was correctly divided into three optimization stages (no necessary pesticides) according to the fruiting period from April to November by various indexes. Thinking of the regulation of the total community and the productive and edible characters of mushroom, prevent first should play a main role of IPM and make good use of the natural enemies controlling except that a few chemicals treated with the raw materials at the beginning stage. When the number of pests reached the top, the planted, physical and economic method should be used to integrated pests management, such as before the top, the net prevent the pests from entering before the indoor and outdoor, natural enemies' conservation, Sex-attractant, lights ect.