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杂草不但与葱蒜争光争水争肥,而且还会加剧病虫危害。葱蒜因草害一般减产20%～30%,严重的达60%以上,甚至绝收。草害的特点是发生早、危害期长、发生量大,因此葱蒜田搞好除草尤为重要。大蒜在播后至立针期,或2叶1心至4叶期,每亩用43%旱草灵90～130毫升,或24%果尔乳油48～72毫升,或37%抑草宁110～180毫升,或25%恶草灵100～140毫升,对水40～60公斤均匀喷雾,能防除禾本科杂草和阔叶杂草。果尔和恶草灵用后会使蒜叶出现褐色或白色斑点,但5～7天即可恢复,对大蒜无不良影响。但要注意,覆草蒜田用药量相对于露地蒜而言,要适当加大水量,喷粗雾;地膜蒜田用药量为露地蒜的1/3,对水量同露地蒜。洋葱田化学除草分三种,一是育苗洋葱,每亩用50%扑草净65～75克对水60公斤均匀喷雾。二是直播洋葱,播种后
Weeds not only compete with the onion and garlic fight water fight fertilizer, but also exacerbate pest damage. Onion garlic grass because of the general reduction of 20% to 30%, a serious up to 60% or more, and even absolutely. Grass pests are characterized by occurrence of early, long-term damage, the occurrence of large, so onion garlic field weeding is particularly important. Garlic after sowing to the needle phase, or 2 leaf 1 heart to 4 leaf stage, with 43% per hectare Yancao Ling 90 to 130 ml, or 24% guar EC 48 to 72 ml, or 37% Agronomy 110 ~ 180ml, or 25% oxalis 100 ~ 140ml, water 40 ~ 60kg evenly spray, can control grassy weeds and broad-leaved weeds. Fruit and evil spirits will make garlic with brown or white spots, but 5 to 7 days to recover, no adverse effects on garlic. However, it should be noticed that the dosage of mulched garlic is higher than that of exposed garlic, and the amount of water should be appropriately increased to spray coarse haze. Onion field chemical weeding in three, one nursery onions, with 50% per mu net prothimunate 65 ~ 75 grams of water 60 kg evenly spray. Second live onions, sowing