我家有一从玫瑰,从1984年以来,连续三年由于本地区夏季高温多雨,受了白粉病的感染,虽经多次喷布甲基托布津和多菌灵,仍不见效。正在无计可施的时候。听别人说高锰酸钾可治月季白粉病,就抱着试试看的态度。于去年6月下旬开始给玫瑰和月季每周喷洒一次千分之一的高锰酸钾溶液。去年东宁高温多雨,白粉病比往年传染更厉 My family has a rose. Since 1984, it has been affected by powdery mildew for three consecutive years since 1984, due to the hot and rainy summer in this region. Although it has been repeatedly sprayed with thiophanate and carbendazim, it still does not work. Is doing nothing. Listen to others that potassium permanganate can cure pink powdery mildew, hold the attitude of trying. In late June last year, rose and rose are sprayed once per week with one part per thousand of potassium permanganate solution. Last year, hot and humid in Dongning, powdery mildew than in previous years more contagious