Study On Arthropod Community Structure And Control Measures Of Main Insect Pests Of Bletilla Striata (Thunb.) Reichb.f Field In Pu‘er

Betilla striata(Thunb.)Reichb.f belongs to Bletilla Reichb.f.Orehidaceae,it is a perennial herb and one of the important Chinese herbal medicines,but also has a high ornamental value.Several kinds of plants of the Bletilla Reichb.f.have medicinal value with its dry tuber,the main effect of convergence for hemostasis,swelling of the myogenic,pain and make up the lungs,it`s named as the best Chinese surgical medicine.In this study,the insect community structure and community diversity were investigated,and the occurrence and damage characteristics of the main pests were explored.Selection of pollution-free agents for the prevention and control of main insect pests of Betilla striata(Thunb.)Reichb.f.For the industrial of Betilla striata(Thunb.)Reichb.f development and GAP standardized planting to provide a scientific basis.The results are as follow:1.There are 76 kinds of the arthropod found and investigated in the area of Betilla striata(Thunb.)Reichb.f,which includes 4 classes,13 orders and 56 families,of which there are 46 kinds of herbivorous,belonging to 34 families;14 kinds of predators belonging to 10 families;8 kinds of parasitorids belonging to 8 families;there are other 8 kinds of Neutral insects belonging to 6 families.Among insects,the largest of number of families and species is Diptera,the largest number of individuals for Hymenoptera.2.The highest of community richness index is Diptera,dominance index is Spider head.The highest of diversity index and the uniformity index are Hymenoptera.The results of temporal dynamics analysis,the species and diversity index in June were the largest,the individual number is largest in April.3.Through the different taxa analysis that is the largest number of species of herbivorous,it directly lead the change of species in arthropod community of.Betilla striata(Thunb.)Reichb.f in Pu`er.The number of species of natural enemies is relatively stable.The number of species and diversity index of the collection method with sticky board and visual inspection is the highest.The number of species trends is almost same as the total community,it directly lead the change of species and individual number in arthropod community.4.A total of eight main insect pests were investigated,name respectively: Myzus persicae(Sulzer),Hypogastrura communis,Tetranychus cinnabarinus,Dialeurodes citri(Ashmead),Empoasca pirisuga Matumura,Gryllidae,Thripidae,Limacidae,of which the two largest number and the most serious harm to the important pests are: Hypogastrura communis and Tetranychus cinnabarinus.5.Comprehensive analysis of two main pests of the agent control test,the result of prevention and treatment of Tetranychus cinnabarinus is 20% Fenpropathrin EC 2000x>15% pyridaben EC 2000x>10%Avermectins SG 10000x>22% Avermectins·Spirodiclofen SC 4000x>5% Matrine AS 5000 x,the result of prevention and treatment of Hypogastrura communis is 10%Avermectins SG 10000x>4.5%Beta cypermethrin EC 1000x>5%acetamiprid EC 3000x>5% Matrine AS 5000x>70% Imidacloprid WG 1000 x.