无论是红糖或白糖,用稀释液在蔬菜上作叶面喷洒,都能起到防病、促长的作用,而且成本低、无毒害、无污染。一、作为增效剂防病害。将糖、尿素、水,以1:0.5:100的比例混匀,在清晨或下午4点后叶面喷洒,6天喷1次,连喷4～5次,对黄瓜霜霉病防治可达90%以上。 Whether it is brown sugar or white sugar, diluted with a leaf on the vegetables for spraying, can play a role in disease prevention and promote growth, and low cost, non-toxic, non-polluting. First, as a synergist to prevent disease. The sugar, urea, water to 1: 0.5: 100 mixing ratio, in the early morning or afternoon after 4:00 foliar spray, spraying 6 days, and even spray 4 to 5 times, the cucumber downy mildew prevention up to More than 90.