水稻抽穗期遇连续低温阴雨天气,应普遍用药防治稻瘟病,对易感病品种,应在破口期(全田水稻破口10%~15%)和齐穗期(全田水稻80%穗子抽出),两次用药防治。适用药剂有稻瘟灵、三环唑、咪鲜胺等。其中稻瘟灵、三环唑等药有极强的内吸传导性,一般施药后有2~3小时不下雨,防效就能得到保证。雷阵雨天气可以根据情况,趁雨隙喷药。雨后稻叶上有水时,宜适当减少用水量,细喷雾或者用弥雾机喷药。这样,高浓度的药液落到有水的稻叶上, Rice heading stage when the continuous low temperature rainy weather should be widely used in the control of rice blast disease susceptible varieties should break at the breach (the whole field of rice breach 10% ~ 15%) and full heading (full field rice 80% Out), twice medication control. Applicable drugs are rice blast eruption, tricyclazole, prochloraz and so on. One of rice blast eruption, tricyclazole and other drugs have strong absorption of the internal conduction, the general application of 2 to 3 hours after the rain, control can be guaranteed. Thunderstorm weather can be based on the situation, while taking the time to spray drugs. When there is water on the rice leaves after the rain, it is advisable to reduce the amount of water used, spraying finely or spraying with a mist sprayer. In this way, the high concentration of liquid fell on watery rice leaves,