Study On The Dynamics Of Arthropod Community In Super Rice

This paper studies on the population dynamics of arthropod community of super rice in Changsha Hunan.lt was firstly found in June2011, studied the population of arthropod community..occurrence of major insect pests and migrate pests and its population dynamics were studied.The results were as follows:According to the enemy and pest sub-community in Paddy Rice, the results show that:with the rice development,changes occur each sub-community,when the rice transplanting,the number of species and abundance、diversity increased gradually,stabilized in the medium of rice,the latter began to decline due to the impact of rice nutrient and wether condition,in the overall process,Diversity indices were lower than3,community stability is not high.Species moved into the paddy in the early of rice transplanting,species moved out of the rice fields when the mature stage,evenness decreased,the interim stabilized on the rice growing,pre-dominant index of rice pests below the natural enemy sub-community,indicated that the pest sub-communities within the individual sub-communities even than the distribution of natural enemies.The main pests and predators of rice and t-test showed that Delphacidae and Chilo suppressalis(Walker) was no significant difference in different years,Theridion octomaculatum Boes. E Str,Lycosa pseudoannulata(Boes. Et Str.)and Staphylinidae difference was not significant,other performance the significant difference.Niche analysis shows Chaphalocrocis medinalis Gueneehas the maximum value niche breadth,Nephotettix cincticeps(F abricius) has the smallest niche breadth,niche intends ringed tarantulas and various pests similarity index greater proportion,description intends Lycosa pseudoannulata(Boes. et Str.) and various pests in time synchronization.The main pests of rice Chilo suppressalis(Walker) sex pheromone trials performed,the results showed that Chilo suppressalis(Walker) sex pheromone simply placed in the field、 simple operation,and to facilitate the observation count capture insects、do not harm the natural enemies,place2lure of Chilo suppressalis(Walker) control effect is better than placing a lure and3.5%emamectin benzoate pharmaceutical treatment area.Finally, this study also migratory pest Delphacidae, Chaphalocrocis medinalis Guenee and Parnara guttata guttata Bremer et Grey were studied on rice,analysis found that the Delphacidae and Parnara guttata guttata Bremer et Grey correlation of0.943**,a significant positive correlation at the0.01level,also for2011Parnara guttata guttata Bremer et Grey spurt phenomenon analyzed,Inferred Parnara guttata guttata Bremer et Grey source nature of Hunan Province have both local insect migration to the field of insect.