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上海市农科院植保所和川沙县农业技术推广中心科技人员,经过多年共同努力培育出抗褐稻虱晚粳新品种“沪粳抗1号”(即p339),并经受了褐稻虱大发生的考验。在1987年褐稻虱特大发生年的情况下,为进一步比较“沪粳抗1号”与本地当家品种“秀水04”之间的虫量差异,我们在不防治褐稻虱的前提下,进行定田系统观察。从8月1日到10月4日,每隔3天调查1次,共22次,采用虫胶盆拍法,每次拍百穴,在室内分龄检虫,现把观察结果简述如下:
Shanghai Academy of Agricultural Sciences Plant Protection and Chuansha County Agricultural Technology Promotion Center of science and technology personnel, after years of joint efforts to cultivate a new late japonica resistance varieties of brown planthopper “Shanghai japonica resistance 1” (ie, p339), and experienced brown planthopper What happened? In 1987, when the annual occurrence of brown planthopper was extremely large, in order to further compare the insect quantity difference between “Shanghai-japonica anti-1” and the local native variety “Xiushui 04”, we conducted the experiment without controlling brown planthopper Dingtian system observation. From August 1 to October 4, the survey was conducted once every three days for a total of 22 times. The shellac method was adopted. Each time, 100 insects were sacrificed at the age of 12 months. The observations are summarized as follows :