麦棉套种与病虫防治

• 出 处: 山西农业科学
• 发表日期: 1984年08期
• 关键词: 麦棉套种 棉叶螨 晚播 轮作倒茬 少者 棉花苗期 秋苗 田应全 发病指数 出苗前

麦棉套种因多年连作,致使棉叶螨和小麦丛矮病大量发生为害,轻者减产1—2成,重者减产4成以上,个别地块甚至绝收。凡麦棉套种连作四年以上者,病虫为害均重;10月上旬套种的小麦,丛矮病发生较10月中、下旬播种的为重;凡管理精细,田间杂草少者,发病均轻。防治措施,①轮作倒茬。

Cotton and cotton intercropping due to years of continuous, resulting in a large number of cotton spider mite and wheat cotyledons disease damage, the light cut 1-2 percent, heavy cut more than 4 percent, even a few individual plots. Where wheat and cotton intercropping even more than four years were pests and diseases were heavy; early October interplanted wheat, bushy dwarf disease than in mid-October, late sowing is heavy; where management is fine, less weed in the field, the incidence were light. Prevention and control measures, ① crop rotation.