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大豆是安阳县重要的经济作物,安阳县习惯上以种植夏大豆为主,要夺取夏大豆丰收,重点抓好以下几种病害的防治。一、根腐病1.症状。出苗前染病引起种子腐烂或死苗。出苗后染病引致根腐或茎腐,造成幼苗萎蔫或死亡。成株染病茎基部变褐腐烂,上部叶片褪绿,造成植株萎蔫,叶片凋萎。2.防治。播种前用35%甲霜灵粉剂或72%克露可湿性粉剂拌种,用量均为种子量0.3%~0.4%。二、茎枯病1.症状。多发生于大豆植株生育的中后期,主
Soybean is an important economic crops in Anyang County, Anyang County, the habit of planting summer soybean-based, to seize summer soybean harvest, focusing on the following types of disease prevention and control. First, the root rot 1. Symptoms. Pre-emergence disease caused by seed rot or dead seedlings. Emergence of disease caused root rot or stem rot, resulting in seedling wilt or death. The stalks of adult plants became brown and decayed, and the upper leaves became chlorotic, resulting in wilting of the plants and wilting of the leaves. 2. Prevention. Before sowing with 35% metalaxyl powder or 72% grams of dew wettabler seed dressing, the amount of seeds are 0.3% ~ 0.4%. Second, the stem blight 1. Symptoms. Occurred in the mid-late soybean plant growth, the Lord