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近年来由于各方面原因,水稻出现几种新的病害,而且有逐年扩大的趋势。因此今后必须注意观察其动向,研究其发病规律,并采取必要措施防止其发生和蔓延。 一、水稻细菌性心腐病 1972年5月,遂川县农科所30多亩早稻发生此病,遂川县于田、枚江、瑶下、中石等公社相继发生,发病面积达百余亩。发病率高的达33%,低的也有4%。品种以辐射32、九农早、八四早、二九南、6044发病较重,严重的减产70%。1973年冬全区植保会议上,各县反映亦有此病零星发生。此病在分蘖期症状比较明显,心叶凋萎卷缩,后期变
In recent years, due to various reasons, rice has several new diseases, but also the trend of expanding year by year. Therefore, in the future, we must observe its movements, study its pathogenesis, and take the necessary measures to prevent its occurrence and spread. First, the rice bacterial heart disease May 1972, Suichuan County Agricultural Institute of more than 30 acres of early rice disease, Suichuan County Yujiang, Yao, stone and other communes have occurred, the incidence of more than a hundred mu. The high incidence of up to 33%, low also have 4%. Varieties to radiation 32, nine agricultural early, eight four early, two nine South, 6044 incidence heavier, severe cut 70%. In the winter of 1973, at the plant protection conference, all counties also reported sporadic occurrence of this disease. Symptoms of the disease at the tillering more obvious, heart wilt curling, late change