The Occurrence Dynamics And Control Techniques Of Apocheima Cinerarius (Lepidoptera:Geometridae) In Northern Xinjiang

Object: To provide prediction of forestry pest and selection pesticides for controlling larvae density,the relationship between the number of pupa and larvae,as well as emergence time of adults and the temperature of Apocheima cinerarius were observed in Northern Xinjiang.Methods: The sample observation method is used to select the fixed field and observe the records regularly.Results: 1.There was a significant linear relationship between the number of overwintering pupae and the larvae density of A.cinerarius,the linear regression equation was Y = 147.031 + 0.906 X,and the correlation coefficient was 0.685;and it's also a significant linear relationship between the oviposition amount and the weight of overwintering pupa,the linear regression equation was Y = 5.407 + 772.485 X,and the correlation coefficient was 0.734.2.The emergence of A.cinerarius began to emerge from the middle until late March,peak is around March 25,ending early April,and the duration of emergence about 15-20 d in Northern Xinjiang.The number of emergence and the peak are different in every year.3.There was a significant relationship between emergence number and temperature on the A.cinerarius,the temperature of beginning occurrence stage was 1-10?;the average temperature of emergence period was 4.4-14.5?,peak was 9-13.5?.In the same year,the temperature of the beginning stage,the peak stage and the ending stage between females and males were consistently.4.The results of the indoor toxicity test showed that 5% methyl aminobearmycin benzoate water dispersible granules,5% propranolol suspending agent,24.5% avermectin/engine oil EC can be first chosen,followed by 1% matrine soluble liquid,40% chlorpyrifos EC,and the virulence index(Ti)was above 2000.Field screening test showed that the 4000 times of dispersible granules of methyl aminobearmycin benzoate and 1500 times of propranolol suspending agent had the best effects on A.cinerarius.The corrected mortality rates of larvae were 95.58% and 94.46%,respectively.The 24.5% avermectin / engine oil EC 1500 times,1% matrine soluble liquid 1500 times,40% chlorpyrifos EC 2000 times,20% diflubenzuron(dexamid urea I)suspending agent 7000 times liquid,and 15% cypermethrin wettable powder 1500 times liquid had better effects on A.cinerarius.The corrected mortality rates of larvae were 92.93%,88.67%,84.54%,80.26% and 76.47%,respectively.Conclusion: 1.There was a significant linear relationship between the number of overwintering pupae and the larvae density of A.cinerarius,the oviposition amount can be predicted through the linear regression equation Y = 147.031 + 0.906 X by observing the weight of overwintering pupa.2.The emergence stages of A.cinerarius were related to the temperature and the soil temperature.The adults emergence stage can be predicted based on the temperature and the soil temperature,which can be used to improve pest prediction efficiency,and reduce the work pressure of basic staff.3.During the outbreak of A.cinerarius,5% Emamectin benzoate-chlorfenapyr WDG,5% Chlorfenapyr SC,and 24.5% Avermectin EC can be selected to reduce the density of larvae mouth rapidly.