Peony sees diseases such as brown spot and root rot. Common insects include spider mites and roundworms.
Brown spot disease mostly occurs in high temperature and rainy season. At the time of onset, yellowish green spots appear on the leaves first, and round and small brown spots gradually form. It can be sprayed with 0.5% equal amount of Bordeaux mixture or 65% Zeoxin 800 times solution. Root rot is mainly caused by poor drainage. After onset, the roots were rotted black and the aboveground parts were not growing well. You can use the 60-degree white liquor to wash the roots and replant them. Found pests such as spider mites and aphids, which can be sprayed with 40% triclosan 2000 times, 40% dimethoate 3000 times, or 80% dichlorvos 2000 times.
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