一是立刻将病苗拔出 ,同时挖除病根附近的泥土 ,一起带出床外集中烧毁。二是喷铜铵合剂 ,铜铵合剂配制方法是用硫酸铜粉 2份 ,碳酸氢铵 11份 ,充分混匀后装入瓶中 ,拧紧瓶盖密闭 2 4小时即可使用。使用时用 1份药粉 ,溶化于 4 0 0份清水中喷雾 ,每隔 7～ 8天喷 1次 ,连续喷药 2 First, immediately pull out the sick seedlings, while digging the roots near the soil, together with the bed burned. Second, spray copper ammonium mixture, copper ammonium mixture preparation method is to use copper sulfate powder 2 parts, 11 parts of ammonium bicarbonate, fully mixed into the bottle, tighten the bottle closed 24 hours to use. When used with 1 powder, dissolved in 400 parts of water spray, spraying every 7 to 8 days, continuous spraying 2