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水稻恶苗病近来成为我区影响水稻产量的严重病害。1979年前后,曾在早金凤5号等品种上严重发生,病苗率高达43.4%。1981年又在杂交稻的威优系统上严重危害,勉县东风公社发病面积占插秧面积的76%,较重田块病株率20—30%。1982年全地区发病较重面积16.2万亩,严重地威胁着水稻生产,成为一个急待解决的问题。试验研究指出,本病以种子带菌为主要传播途径。目前我区骨干品种威优圭、威优激等杂优组合特别感病,带菌率高。因此,数以百万斤的稻种需要进行有效的种子处理。
Fusarium oxysporum has recently become a serious disease affecting rice production in our district. Around 1979, Zaojinfeng 5 and other varieties occurred on the serious, the disease rate of up to 43.4%. In 1981, it was seriously endangered on the prestige system of hybrid rice. The area affected by Mianxian Dongfeng commune accounted for 76% of the transplanting area, and the heavier field was 20-30%. In 1982, the area with a heavier incidence of 162,000 mu in the whole region seriously threatened rice production and became an urgent issue to be solved. Experimental study pointed out that the disease with the carrier of the main route of transmission of bacteria. At present, the backbone of our region Weiyou Gui, Wei Yougui and other gifted combinations particularly susceptible, with high rates. As a result, millions of pounds of rice require effective seed treatment.