Identification and Evaluation of Resistance to Borer of Main Maize Varieties in Different Growth Stages in Xinjiang

【Objective】 To identify the resistance level of maize borer and select the local anti-borer varieties in the hope of providing provide important alternative measures for the green prevention and control and pesticide application reduction in Xinjiang. 【Method】 The identification of resistance to borer in 19 maize cultivars at different growth stages in Xinjiang oasis was carried out by means of feeding grade method, larval weight evaluation method and culm survey method. 【Result】 There were significant differences in the resistance levels of corn borer at heart leaf stage and maturity stage among the tested maize varieties (P< 0.05), which were as follows: KWS1553 had the best resistance at heart leaf stage, with an average feeding grade of 2.9, larval survival rate of 33.33%, larval weight of 0.000,77 g, and high resistance (HR) level. The average feeding grade, larval survival rate and larval weight of Xinyu 57 were 2.9, 65.48% and 0.001,64 g, respectively, which also reached high resistance (HR) level. Xianyu 335 and KWS6333 reached the resistance (R) level. Xinyu 108 showed the best resistance to borer in mature stage, with the average number of borer holes per plant and the average tunnel length per plant being 0.03 and 0.04 cm per plant, respectively. The average number of cavities per plant and the average tunnel length per plant were 0.05 and 0.04 cm/plant, respectively. Xinyu 57 showed the worst resistance to corn borer, with the average number of borer holes per plant and the average tunnel length per plant being 1.08 and 3.06cm/plant. 【Conclusion】 Varieties KWS1553, Xinyu 108, Wugu 631, Wugu 310, KWS6333 and Zhengdan 958 show good resistance to borer at seedling stage and maturity stage, while Xinyu 57 show high resistance to borer at seedling stage and poor resistance to borer at maturity stage. It is suggested to choose the varieties with better resistance to the corn borer in production, and avoid the planting of susceptible and highly susceptible varieties, which can realize the natural control of the corn borer to a certain extent and reduce the application of chemical pesticides.