Objective In order to screen out the pesticides suitable for the prevention and control of major pests in maize fields in different maize producing areas in Xinjiang, and to construct the technical model of one spray and multiple prevention of major pests in maize fields in this area, the efficacy test of one spray and multiple prevention of major pests in maize fields was carried out in the typical oasis ecological area of Xinjiang and its efficacy was evaluated.

Method In the middle and late stages of maize growth, plant protection UAVs were used to spray insecticides with different insecticidal mechanisms, and adjuvants, synergists or fungicides were applied according to the needs. Afterwards, the control effects of different insecticides on the main pests in maize fields in this area were compared and analyzed by the survey data before and after spraying.

Result The main pests in the experimental corn field in Letuyi Town, Manas County, Changji Prefecture were Helicoverpa armigera and Ostrinia furnacalis. The damage reduction rates of Helicoverpa armigera and Ostrinia furnacalis were the highest after 28 days of treatment with 19.4% chlorantraniliprole · emamectin benzoate (low concentration of 12 mL/667 m² + adjuvant 2) . The damage reduction rate of Helicoverpa armigera was 77.78% and the damage reduction rate of Ostrinia furnacalis was91.67%%. The two application periods were different in 7 townships of Qapqal County, Ili Prefecture. The first time was mainly to control Helicoverpa armigera and Ostrinia furnacalis. The 22% thiamethoxam · high chlorine fluoride (low concentration 7.5 mL/667 m² + adjuvant) had the highest rate of population decline. After 28 days, the highest rate of Helicoverpa armigera population decline was 97.87%, and the highest rate of Ostrinia furnacalis population decline was 98.25%. The second prevention and control of Helicoverpa armigera, Ostrinia furnacalis, Monolepta hieroglyphica and Rhopalosiphum maidis, 28 days after treatment, 30% chlorantraniliprole (10 mL/667 m²) + adjuvant + Paenibacillus polymyxa treatment of Helicoverpa armigera population decline rate up to 71%, 320 g / L flucarbazide · indoxacarb (10 mL/667 m²) + adjuvant + Paenibacillus polymyxa treatment of Ostrinia furnacalis population decline rate up to 90.74%,The population decline rate of Monolepta hieroglyphica treated with 10% abamectin (3 mL/667 m²) + adjuvant + azoxystrobin · tebuconazole was the highest (67.35%), and the population decline rate of Rhopalosiphum maidis treated with 10% abamectin (5 mL/667 m²) + adjuvant + azoxystrobin · tebuconazole was the highest (70.74%). The main pests in the corn field of Malan Base in Bazhou and Shuoxian County were Helicoverpa armigera and Ostrinia furnacalis. The best control effect was 320 g/L fluroxyurea · indoxacarb (low concentration 12 mL/667 m²) + synergist + adjuvant + hydrazine · etoxazole. The highest damage rate of Helicoverpa armigera was 75.86% and the damage rate of Ostrinia furnacalis was 75.89% after 28 days. Helicoverpa armigera and Ostrinia furnacalis were the main pests in maize fields in Tazihong Township, Shule County, Kashgar Prefecture.After 28 days of treatment, the highest reduction rate of Helicoverpa armigera population was 89.39% treated with 60 g/L spinetoram (20 mL/667 m²) + adjuvant, and the highest reduction rate of Ostrinia furnacalis population was 84.36% treated with 30% chlorfenapyr (15 mL/667 m²) + adjuvant + imidamide · thiamethoxam.

Conclusion To sum up, the prevention and control technology mode ofgrasping the key period ofmajor corn pest prevention and control, and establishing the prevention and control technology mode ofnsecticide reduction to improve the efficacy of chemical agents and reduce the number of pesticideapplication are more suitable for the comprehensive prevention and control of major pests in the cornproducing areas ofthe typical oasis ecological region of Xinjiang.