牡丹冬季催花时经常发生灰霉病、牡丹烂根(根腐病)和落蕾。这些看似普通的小问题在每一年的催花中都能遇到,如不提前发现或防治会使催花质量大打折扣,整个冬季的心血白费,经济损失严重。1.灰霉病发生诱因与防治灰霉病发生诱因空气湿度大、光照不足及持续低温。表现症状受害部位 Peony winter flowers often gray mold, rotten roots of peony (root rot) and fall buds. These seemingly ordinary small problems can be encountered in the reminder of flowers every year. If they are not discovered or prevented in advance, the quality of the flowers will be greatly reduced. The whole winter will be in vain and the economic loss will be serious. 1. Botrytis causes and causes of gray mold prevention and control incentives Air humidity, lack of light and sustained low temperature. Performance symptoms of the affected area