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武陵山区是稻瘟病常年发生流行地区。病害发生程度,主要受品种抗性及气候条件的制约.1989年,武陵山区大部分主栽品种如汕优63、D 优63、V 优63、V 优64等丧失抗瘟性,稻瘟病猖獗流行,发病面积254.6万亩,占该地区稻田面积的47.1%,稻谷损失7731.46万公斤,其中黔江地区发病面积81万亩,占稻田面积的69.2%,稻谷损失1 440.8万公斤.为了尽快选出抗病高产的杂优水稻组合及制种亲本材料,为今后品种的布局和稻瘟病的综合治理提
Wuling Mountain is a perennial endemic areas of rice blast. The degree of occurrence of the disease was mainly controlled by the variety resistance and climatic conditions. In 1989, most of the main cultivars in Shaoxing, such as Shanyou 63, D You 63, V You 63, V You 64 and so on, lost their blast resistance and the blast was rampant Epidemic, the incidence area of 254.6 hectares, accounting for 47.1% of the area of paddy fields in the region, the loss of 77.3146 million kilograms of rice, of which Qian area of 81 million mu of disease, accounting for 69.2% of rice paddy area, paddy loss of 14.848 million kilograms. The superior combination of disease-resistant and high-yielding hybrid rice and the seed material for seed production, for the future layout of the variety and the comprehensive management of rice blast