稻瘟病。该病在田间温度大,施氮肥过多时容易发生。最初叶片上产生褐色小点,并逐渐扩大成梭形斑,两端有向叶脉延伸的褐色线,还可侵染穗颈节和谷粒,造成白穗或秕粒。在发病初期,用20％三环唑可湿性粉剂或40％富士一号乳油,每亩75—100克,兑水50—60公斤喷雾防治。对穗颈稻瘟病,可在破口期和齐穗期各喷药一次,防治效果在90％以上。白叶枯病。发病初期,叶尖或叶缘呈暗绿色、水浸状,很快变成暗褐色,沿叶脉两侧扩展,最后 rice blast. The disease in the field temperature, excessive nitrogen fertilizer prone to occur. The first blade to produce small brown spots, and gradually expanded into a fusiform spot, both ends of the veins extending brown lines, but also invade the panicles neck and grain, resulting in white spike or tablets. In the early stages of onset, with 20% tricyclazole WP or 40% Fuji One EC, 75-100 grams per mu, watered 50-60 kg spray control. Right panicle blast, blasting and heading in the spraying time, the control effect of more than 90%. Bacterial blight. Early onset, the tip or leaf margin was dark green, flooded, quickly turned dark brown, along both sides of the veins expanded, and finally