Field Control Effect Evaluation of Different Pesticides against Contarinia sp.

【Objective】This project,in view of the actual production,aims to test the control effects of different pesticides against Contarinia sp. in order to screen out the safer and more effective medication and provide valuable scientific information for the rational control of the pests in practice.【Method】Different types of pesticides and various dosages were tried in the experiment when the peak larvae of the first stage Contarinia sp. occurred. 【Result】From the field control efficiency experiments,it could be concluded that 40% Chlorpyrifos EC,3. 5% imidacloprid WP and 5% bata- cyfluthrin EC had better control effect,reaching more than80% after 11 days and the second better one was 20% acetamiprid WP,the control effect of which could reach 70. 12%. The effective controlling time was about 11 days.【Conclusion】Dilution of 40% cglorpyrifos EC may be recommended for application in jujube orchard during the peak incidences of Contarinia sp. larvae. 3. 5% imidacloprid WP,5% bata- cyfluthrin EC and 20% acetamiprid WP can be applied alternately in other times.