我县近几年大面积种植杂交水稻,普遍获得大幅度增产。目前存在的问题是,当家的杂交水稻品种“四优二号”对稻瘟病的抗病力正在减弱。不久前我站对去年各公社杂交水稻制种送来的“四优二号”种子经过取样,恒温培养,诱发病菌萌发,进行显微镜检查。检查结果除城关公社的种子没查到稻瘟病菌外,其他各公社都查到有不同程度带菌,其综合发病率为2.7～26.3％。自西力生、赛力散禁止使用以来,作水稻种子处理的药剂不多。为此进行本项试验。 In recent years, my county planted large areas of hybrid rice, generally increased sharply. The existing problem is that the disease resistance of the hybrid rice “Siyou No.2” to rice blast is weakened. Not long ago I stood on the communes of hybrid rice seeds sent to the “Siu You 2” seeds after sampling, incubation, induced germ germination, microscopic examination. In addition to the check results commune commune did not find the seeds of Magnaporthe grisea, the other communes were found to varying degrees of carriage, the overall incidence of 2.7 to 26.3%. Since Xi Lisheng and Sai Li San have banned their use, there are not many medicaments for rice seed treatment. To do this test for this purpose.