1.育苗洋葱洋葱播后苗前,每亩用50%扑草净可湿性粉剂80~100克或33%二甲戊灵乳油100~125毫升、23.5%乙氧氟草醚乳油40~50毫升喷雾处理土壤。除扑草净不宜用于沙壤土外,对洋葱基本安全,除草效果好,也可每亩用48%氟乐灵乳油100~150毫升施后混土。盖膜洋葱用药量要低,土壤湿度不能太大。沙土地用低量,否则易造成对洋葱的隐形药害。2.直播洋葱播后苗前,每亩用50%扑草净可湿性粉剂65~80克,加水40~60升,均匀喷雾。土壤湿度不能 1. Nursery onion onion sowing before, with 50% per acre with 50% prometryn WP 80 to 100 g or 33% pendimethalin 100 to 125 ml, 23.5% oxyfluorfen EC 40 to 50 ml Spraying the soil. In addition to prometryne net should not be used for sandy loam, onions basic safety, weeding effect, but also with 48% of trifluralin EC 100 ~ 150 ml after mixing. Membrane onion dosage to be low, soil moisture can not be too large. Sand with a low amount of land, otherwise easy to cause onions invisible injury. 2. Live onions sowing before the seedlings, 50% of prussia per acre with a net WP of 65 to 80 grams, add water 40 ~ 60 liters, uniform spray. Soil moisture can not