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1982年灌区稻瘟病发病面积达12.2％,经防治后估计产量仍损失2％。发病情况很不平衡。我们于当年8月28日至9月9日重点调查了永宁等三县和农作物研究所。根据调查结果可以看出: 1.从品种看,宁粳8号发病最重,其次为京引39号。丰矮5号抗病力强。但在亩施纯氮34.5斤以上时这些品种都感染稻瘟病。京引39号在品种纯度
In 1982, the incidence of rice blast in irrigation area reached 12.2%, and the estimated output after the prevention and treatment still lost 2%. The incidence is very uneven. From August 28 to September 9 of that year, we focused on investigating three counties like Yongning and the Crop Research Institute. According to the survey results can be seen: 1. From the species perspective, Ningjing 8 the heaviest incidence, followed by Beijing cited No. 39. Feng Aki 5 strong disease resistance. However, in Mushu more than 34.5 pounds of pure nitrogen when these varieties are infected with rice blast. Beijing cited No. 39 in the species purity