Research On Species And Integrated Control Technique Of Fruit-Borer In Yili Reclamation Area

Object: Study on the species and population dynamics of fruit borer in different types of orchard such as apple orchard、peach orchard in Yili. The method of sex pheromone, bagging techniques control effect of borer were explicited. Pesticides of efficiency and low toxicity were screening. The result provide the technical basis for the fruit borer control. Methods: Hanging obligate insect sex pheromone, monitoring borer species and occurrence dynamic by the regular fixed-point investigation, Comparing with different density of Sex Pheromones to Select the economical and efficient use of the Sex Pheromones, Comparing the rate of fruit decay of different bagging time to choose the bagging time effectively, screening high efficiency and low toxicity pesticide by the spray method in the field. Results: 1. The result shows that Grapholita molesta is the mainly fruit moth in Yili, the number were 45.44 %and 61.10 % of the total trapping pest amount in apple and peach fields, respectively. Grapholitha funebrana is second place, which account about for 43.44% and 24.16% of the total number of the moths in apple and peach field, and Cydia pomonella were 9.55% and 11.42% of the total number of the moths in apple and peach field,Carposina niponensis rarely occur,Dichocrocis punctiferalis can not find during experiment.2.The Grapholita molesta, Grapholitha funebrana and Cydia pomonella has 5, 3, 3 generations a year in Yili valley respectively. Three kinds of moths have overlapping generations phenomenon. According to the monitoring the occurrence peak of adult borer to determine the control time, we can improve the efficiency of control.Optimal time for against fruit borer on apple using insect sex pheromone is start from the beginning of the overwintering generation emergence period. Combine with chemical control, the comprehensive prevention and control effect can reach more than 72.93%. The best time to control Grapholitha molesta is 5~7 days after the peak of adult emergence.3. The 495 wires /hm2 of Grapholita molesta in peach orchard has become more effective and economic method for pest control. Its can be applied and popularized in the forest for 91.84% to control effect, 77.33% to folding tip prevention effect, and 78.85% for fruit borer control effect.4. Apple fruit bagging can prevent borer very well, the more earlier to bagging, the more better to control. The protective effect can reach 94.44% after 25 days from petals falling. After 45 days after flower, the protective effect fall to 72.22%. Petals falling 25 days after, apple bagging can reduce borer damage.5. Bacillus sp. is a biological pesticide, and it is security for apple trees and other non-target animals. It is better to control fruit borer for use 1010 spores/mL SC 600 times. After 10 days, the control effect was 73.91%, which without significant difference with 48% chlorpyrifos 2000 times(p<0.01)6. 20% SC8000 times of chlorantraniliprole is high permeability and high conductivity, which have better control effect for grapholitha molesta. 15 days after two drugs, the top-breaking rate was 79.16% and the fruit-boring rate was 71.89%. Conclusion: Grapholita molesta is the mainly fruit moth in Yili, It is a kind of effective and economic methods for pest control by using insect sex pheromone combined with chemical control from 2 to 3 or using 495 wire /hm2 of grapholita molesta, It is better to control fruit borer for use 1010spores/mL empedobacter brevis SC600 times and 20% SC8000 times of chlorantraniliprole.