论文部分内容阅读
地膜覆盖棉花是一项夺取棉花高产的新技术。为进一步了解其病虫发生及为害情况,我们于1982年在南七公社进行了调查。现初报如下。一、病害: 苗期根病:5月上旬调查,地膜棉与直播棉相比,发病株率和病情指数分别为18％、8.25％和27％、20.00％,前者比后者分别降低40.7％和58.75％(种籽未经药剂处理)。枯萎病:南七公社属零星发病地区,6月下旬,我们选择同品种、同茬口的田块(二年棉花茬)进行了调查,地膜棉与直播棉相比,发病株率和病指分别为0.6％、0.37％
Mulching cotton is a new technology that captures the high yield of cotton. To further understand the occurrence and damage of pests, we conducted a survey in South 七 commune in 1982. Now reported as follows. First, the disease: seedling root disease: early May survey, mulching cotton and direct seeding cotton, the incidence of disease and disease index were 18%, 8.25% and 27%, 20.00%, the former than the latter were reduced by 40.7% And 58.75% (seed without drug treatment). Fusarium Wilt: South Qi commune is a sporadic disease area, in late June, we choose the same species, the same crop of plots (two years of cotton stubble) were investigated, mulching cotton and direct seeding cotton, the incidence of disease and disease respectively 0.6%, 0.37%