Studies On Sex Pheromone Mass Trapping, Mating Disruption And Biorational Control Of Grapholita Molesta

In recent years, Oriental fruit moth , Grapholita molesta (Busck), has become an important fruit pest in many places of China , and serious damaged peach, pear, apples and other fruits , and the disaster area also growing, the trend of increasing year by year.At present, people always used chemical pesticides to control Oriental fruit moth and the pest have resistance to traditional chemical pesticides, resulting in lower-efficiency, and increase the dosage and frequency of using ,also cause seriouspollution of fruit and environment, and explore the Oriental fruit moth control methods is imperative.The goal of our studies is biorational control, high quality, efficient production.In the whole Pear Orchard ecosystem, coordinated and comprehensive evaluation of control effect of sex peromone on the Oriental fruit moth, and control of the key period of reasonable use of biological pesticides, and to coordinate the use of other means of prevention and treatment, the main control techniques were exploited,integrated and used;Research Shaanxi Weibei fruit area of Oriental fruit moth biorational control mode. Analysis the results, give the following main conclusions:Sex pheromones mass trapping can be used to control Oriental fruit moth, and the trapped moths number of two lured entraped instruments is most than other lured entraped instruments; control effect is different when treatmented in vary distance, the control efficiency of trapped in the pear orchard increased when the arrangement trap density increased, control measures at the layout traps density should not less than 12 /667m2, the trapped adults number is not the same , the entraped moth effect of lure+ sweet-sour liquid entraped instruments is significantly more than that of lure entraped instrument or sweet-sour liquid entraped instrument; trapped moths number of a day in the different time period is obvious difference, the time of the most moths trapped is for 14:00 to 18:00 in the afternoon.Japanese sex pheromone was first introduced to control Oriental fruit moth using mating disruption, and achieved better control effect, the persistent period is about four months, the entire growing pears can not or less use of pesticides,and can control the Oriental fruit moth, it is safe and simple ; the effect of mating disruption of lure is also better, but the lure should change each month. therefore , Japanese sex pheromone and lure can also be used to control Oriental fruit moth with mating disruption.The black light lamp, Frequency vibration-killing lamp was not obvious effect of trapping on the Oriental fruit moth, so killing lamp can not be used to control the Oriental fruit moth.Bagged to control Oriental fruit moth is significant effect, double layer bag can use to control Oriental fruit moth , the control effects were significantly affected by the time of bagged, the time of bagged is sooner, the control effect is better. In Shaanxi Guanzhong fruit area, the best time of control Oriental fruit moth is in mid-May.Benzoylphenal ureaⅢand 2000IU/μl Bt SC is the best control effect on Oriental fruit moth in four used biological pesticides, persistent period also longer, the control effect of 25 % of Benzoylphenal ureaⅢand 2000IU/μL BT SC 1000X is 85.38% and 80.86% after treatmented 7 days late; 0.2 % Celangulin EC control effect is better,but persistent period is shorter; 1.8%Avermectins EC is poor efficiency and efficacy short period, after 14 days it is not control effect.