How to raise peonies: what is peony gray mold?

What is peony gray mold? What harm does gray mildew have to peony flower? Please help introduce friends. Peony flower gray mold damage: peony throughout the growth period are affected by gray mold damage, the most incidence of June to July each year. Seedling stem base damaged, dark green, water-stained, irregular disease spots, gradually brown, sunken rot, lodging, disease produced brown mold. After the flower bud is infected, the petal withers, the flower organ turns brown and decays. The leaves and petioles are infected, the spots are round and have irregular ring patterns, and there will be mold on the spots when the weather is wet. Peony flower gray mold control methods: In autumn, the peony litter is cleaned up and burned, and cannot be used as compost. If dead leaves and buds of peony are found, they shall be removed and burned immediately. The soil in the affected area should be deeply ploughed, and it is not suitable to plant too densely; it is best to implement 2~3 years of rotation. Select disease-free peony seed buds, improve soil drainage conditions, do not apply excessive chemical fertilizer. in spr, when that tender bud of the plant in the disease area first bloom, the pesticide is used for protection, and the Bordeaux mixture of 1:1:100 equivalent amount, or the 500-fold solution of 65% mancozeb wettable powder or the 500 - 600-fold solution of 70% mancozeb wettable pow is sprayed once every 7 - 10 days for 2 - 3 times continuously. Click for more peony planting techniques Click for more flower planting techniques