论文部分内容阅读
选用抗虫品种是防治褐稻虱的经济有效措施。一九七六年以来,杂交稻种植面积逐年扩大,为了适应生产需要以及为抗虫育种的选择和应用提供依据,一九七八年,在田间自然诱发的情况下,将品种间褐稻虱虫口密度的差异性进行了调查,并于一九七九年,把由育种室提供的杂交组合、不育系、恢复系等材料进行室内苗期单株接虫鉴定。同时和参加全国、省、地区域试验的杂交组合对褐稻虱的抗感程度进行田间自然诱发鉴定,现将鉴定结果简报如下。
Selection of insect-resistant varieties is a cost-effective measure to control brown planthopper. Since 1976, the acreage of hybrid rice has been expanding year by year. In order to meet the production needs and provide the basis for the selection and application of insect-resistant breeding, in 1978, under the condition of natural induced in the field, Insect population density was investigated. In 1979, the hybrid combinations, CMS lines and restorer lines provided by the breeding room were identified for their susceptibility to individual plant diseases. At the same time, the hybrid combinations that participated in the national, provincial and regional experiments were used to identify the resistance level of the brown planthopper, Nilaparvata lugens, naturally in the field. The identification results are summarized as follows.