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汉中专区各县均有程度不同的稻瘟病发生和为害,尤以山区及盆地边缘侧坡、浅山一带发生最重。一般发病率为20～30%,最高达90%以上。其中以穗颈瘟、节瘟造成的损失最大。从56年起,我们曾与有关单位共同进行了一些调查观察工作,57年起正式作药剂防治试验,以穗颈和节稻瘟为对象,测定几种药剂的防治效果和施药的适宜浓度。兹将1957～58两年的试验结果整理如下,供各地参考。一、试验材料和方法供试品种为在沔县、褒城一带分布较广的感病品种矮娃子(秈稻)。
All counties in Hanzhong prefecture have different degrees of rice blast occurrence and damage, especially in the mountainous and basin edge slope and the shallow mountain area. The general incidence of 20 to 30%, up to 90% or more. One of the panicle blast, Festival blast caused the greatest loss. From 56 onwards, we have carried out some investigations and observations jointly with the relevant units. Since 2007, we have officially conducted experiments on the prevention and control of pesticides. Taking panicle neck and blast of rice as the objects, we have determined the effects of several agents and the appropriate application rate . The 1957-58 two-year trial results are summarized below, for reference. First, the test materials and methods for the test varieties in Pixian, Pao City area is relatively wide spread of susceptible varieties of wild baby (indica).