洋葱在贮藏期间容易发芽,使品质降低,不耐贮藏。利用青鲜素处理洋葱,可抑制发芽和防止腐烂。红皮洋葱经处理后一般可贮藏半年左右。在洋葱收获前一周当叶子开始倒伏时进行叶面喷洒,每亩用25%的青鲜素1斤,加15～20℃的水99斤,配成0.25%的药液,最好再加入2—3两洗衣粉,以增加粘着力。喷前3—5天和喷后不要浇水,以免影响药效,如喷药后24小时内遇雨,应再喷一次。洋葱收获后要晾晒几天, Onion tends to germinate during storage, degrading quality and intolerance of storage. The use of green onion processing onions, can inhibit germination and prevent decay. Red onion treated generally can be stored for about six months. In the week before the onion harvest when the leaves began to fall foliar spray, with 25% per acre with 1 kg of fresh green, add 15 ~ 20 water 99 pounds, dubbed 0.25% of the liquid, it is best to add 2 -3 two washing powder to increase the adhesion. 3-5 days before spraying and after spraying do not watering, so as not to affect the efficacy, such as spraying within 24 hours after the rain, should spray again. After drying the onion to dry a few days,