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一.以防为主,及时喷药。这一概念,一般果农都懂,但在实际操作中,往往做得不到位,或者看天等雨,或者忙于别活,延误了喷药最佳时间,葡萄最易感病。我所做法是:对药物残效期17～21天的药物,一般每15天喷一次药。若中间降雨,视雨量大小,酌情缩短下次喷药天数。若喷药后即遇大雨,则天晴后重喷一遍。若相邻两种药分别为碱性或酸性,则严格注意间隔时间,防止两种药酸、碱中和。切忌延误喷药时间。
First, to prevent the main, timely spraying. This concept is generally understood by farmers, but in practice, often do not get the spot, or see the weather, or do not live, delayed the best time to spray, the grapes are most susceptible to disease. My approach is: drug residues of 17 to 21 days of drugs, usually spray every 15 days a drug. If the middle of the rainfall, depending on the size of rainfall, as appropriate, shorten the next spray days. If the event of heavy rain after spraying, the fine again after the spray again. If the adjacent two drugs were alkaline or acidic, then pay close attention to the time interval to prevent two kinds of acid, alkali and. Avoid spraying the time delay.