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稻瘟病是我省稻区主要病害之一,每年均有不同程度的发生与危害,严重影响水稻稳产高产。73年,罗甸罗苏公社上苏生产队早稻近20亩严重发生稻瘟,一片枯焦,颗粒无收;76年江口德旺公社坝漆大队的水稻普遍发生稻瘟,其中几十亩无收,近百亩减产50％左右;79年全省稻瘟病大流行,仅丹寨县损失稻谷约200万斤。实践证明选育抗病丰产良种是防治该病经济有效的措施。欲育成抗病品种,首先需要有过硬的抗源,而水稻品种资源抗病性鉴定就是筛选抗源的重要手段,只有通过鉴定,了解其抗性,才能有目的地取舍,有针对性的选用。本文就此问题作了研究,提出初步看法,供参考。
Rice blast is one of the main diseases in the rice-growing area of our province, with different degrees of occurrence and harm each year, which seriously affects the stable and high yield of rice. 73 years, Luodianluosu commune on the Soviet Union production team nearly 20 acres of early rice nearly 20 acres of rice blast, a Kujiao, crop failure; 76 years Jiangkou Dewang commune dam paint brigade generally rice blast, of which several dozen acres of no income , Nearly 50% reduction in output of about 50%; 79 years the province’s rice blast pandemic, only Danzhai County lost about 200 million pounds of paddy. Practice has proved that breeding high yielding disease resistant varieties is a cost-effective prevention and treatment measures. To breed disease-resistant varieties, we must first have a strong source of resistance, and identification of rice varieties resistant to disease is an important means of screening resistance, and only through identification, understanding of its resistance, to purposefully choose, targeted selection . This article made a study on this issue, put forward a preliminary view for reference.