What diseases are flowers easy to suffer from?

Flowers are generally susceptible to powdery mildew, anthracnose, gray mold, coal pollution and other common diseases. Control method (take coal pollution disease as an example): strengthen indoor air circulation, timely kill aphids, scale insects, whiteflies and other pests that induce coal pollution disease; spray flowers and branches with 50% methyl sulfur suspension (500 times solution) or 75% Baijunplease wettable powder (500 times solution) at the initial stage of disease, spray once every 15 days, spray 2-3 times continuously.