白粉病的发生与防治,不少资料都有详细介绍,《中国花卉盆景》2006年第10期也做过详细报导。尽管如此,不少花友养的花(包括我自己养的)仍然经常被它侵扰。据我观察,花卉中月季、蔷薇、大丽花、瓜叶菊、凤仙、栀子、紫薇、美女樱、百日草等发病尤为严重。最初危害嫩叶、幼芽、嫩梢及花蕾,逐步蔓延至全株。受害部位披上一 The occurrence and control of powdery mildew, a lot of information has a detailed introduction, “China Flower Bonsai” 2006 the tenth period has done a detailed report. In spite of this, many spent flowers (including my own) are still often infestations. As far as I can observe, the incidence of the disease is especially serious in roses, roses, dahlia, cineraria, impatiens, gardenia, crape myrtle, cherry blossoms and zinnia in flowers. Initially endangered young leaves, shoots, shoots and buds, and gradually spread to the whole plant. Injured parts put on a