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推广抗病良种是防治稻瘟病的一项经济有效措施。但是,连年种植或单一种植某一品种,会造成对某一品种能致病的病菌生理小种迅速增殖和积累,导致抗性丧失,引起病害流行。如近年我区种植的泸双1011,窄叶青8号等品种抗性丧失,就是例证。 我区病菌小种组成复杂,不具备广谱抗性的品种是很难推广的;不合理搭配和轮换种植,也很难保持品种的抗性。因此,尽快筛选出好的抗源,为育种部门提
Popularizing disease-resistant varieties is a cost-effective measure to prevent and control rice blast. However, growing or planting a single species year after year can result in the rapid multiplication and accumulation of pathogenic races capable of causing disease to one species, resulting in the loss of resistance and causing the epidemic. For example, in recent years, the planting of Lu Shuang 1011 in our district and Narrow Ye Qing 8 and other varieties of resistance loss is an example. Species of bacteria in our region is complex, do not have a broad spectrum of resistant varieties is difficult to promote; unreasonable with rotation and planting, it is difficult to maintain the variety resistance. Therefore, a good source of resistance should be screened out as soon as possible and put forward for the breeding department