陕西杨凌国家区试玉米品种病虫害抗性调查

Investigation on Resistance to Diseases and Insect Pests of Maize Varieties in Yangling National Area of Shaanxi Province

[目的]明确不同玉米品种对病虫害的抗性。[方法]于2017年8—9月,在陕西省杨凌示范区国家玉米区域试验站对72个供试玉米品种的病虫害抗性进行调查。[结论]72个供试品种对玉米病虫害的抗性程度差异很大,且在玉米灌浆初期和乳熟期,不同品种之间抗性程度的排序变化较大。2号品种受害最轻,危害率仅为8.33%,是所有供试品种中唯一受害株率小于10%的品种。[结论]初步明确了不同玉米品种对病虫害的抗性程度,为优良抗病虫玉米品种的选育提供理论依据。

[Objective] To clarify the resistance of different maize varieties to diseases and insect pests .[Method] From August to September in 2017, the resistance of 72 maize varieties to pests and diseases in Yangling Demonstration Zone of Shaanxi Province was investigated.[Result]The resistance level of 72 varieties varied greatly to corn pests and diseases, and the order of resistance level of different varieties changed greatly in the early filling stage and milk ripening stage of maize.No.2 variety was the lightest with the damage rate of 8.33%, which was the only strain with a rate of less than 10% of all 72 varieties tested.[Conclusion]The resistance level of different maize varieties to pests and diseases was preliminarily determined, which provided an important basis for the breeding of maize varieties with excellent resistance varieties of pests and diseases.