Methods for the Control of Diseases and Pests in Peace Trees
Today, I will provide a detailed introduction for netizens about the Peace Tree section of the Flower Clinic, focusing on the methods for controlling diseases and pests in Peace Trees. Next, the editor will introduce these methods.
1. (T-J) Disease: This disease mainly affects the seedlings and mature plant leaves. The leaves become infected, often occurring on the leaf surface, tip, and edges, showing irregular brown spots. In the later stage, these spots often expand or merge into large gray-brown patches with brown edges that are wavy. There are many black specks on the lesions, which are its conidial plates. The conidia are spread by wind and rain, and when humidity is high, they germinate and infect the leaves or seedlings. The disease is more likely to occur during continuous rainy weather, insufficient sunlight, heavy soil, or when humidity is trapped in greenhouses, and it is most prevalent from February to April. Control methods: If a few diseased leaves are found, remove and destroy them promptly; during the growing season, apply phosphorus and potassium fertilizers to enhance plant resistance; in the early stage of the disease, spray alternately with a 25% carbendazim wettable powder formulation at 500 times dilution, or a 60% carbendazim wettable powder formulation at 700 times dilution, or a 75% thiabendazole wettable powder formulation at 600 times dilution, every 10 to 15 days, for 3 to 4 times.
2. Brown Spot Disease: This occurs from April to May on the new leaves of the plant. Initially, elliptical brown spots appear on the leaf surface, which then expand and show many black specks inside the lesions on the front of the leaf. The back of the lesions is purple, causing the entire leaf to turn yellow and wither, leading to significant defoliation. Control methods: Use a 1% Bordeaux mixture for prevention; if a few diseased leaves appear, remove and burn them; in the early stage of the disease, spray with a 50% carbendazim wettable powder formulation at 500 times dilution, or a 50% benomyl wettable powder formulation at 1000 times dilution, or a 50% bactericide king liquid formulation at 1000 times dilution, alternating every 10 days, for 3 to 4 times.
3. Brown Root Disease: The leaves of the affected trees gradually turn yellow and droop, and in severe cases, they turn brown and dry up. The stems shrink due to water loss, and the roots turn brown and rot, causing the plant to die within a short period. Diseased roots, soil, and remaining diseased plant debris are the initial infection sources, which are transmitted by wind, rain, or contact, usually affecting a single plant. Control methods: Remove and burn severely affected plants and those that have died from the disease, and disinfect with a 50% carbendazim wettable powder formulation at 600 times dilution; in the early stage of the disease, spray with a 50% methyl thiophanate-sulfur suspension formulation at 800 times dilution, or a 50% root rot terminator wettable powder formulation at 800 times dilution, for control.
① Leaf Rolling Caterpillar
This pest often occurs between summer and autumn. It rolls several new leaves into a nest, where the larvae feed on the leaves. You can spray with a 90% diazinon crystal formulation at 800 times dilution, or a 40% dimethoate emulsion formulation at 1000 times dilution, to kill the pests.
② Aphids
Aphids are prone to occur on the young leaves and buds of cinnamon, causing the leaves to become covered with grease and possibly leading to sooty mold, which affects plant growth and display. Control methods: Sprinkle the plants with wood ash and then rinse clean with water; spray with neem leaf juice to effectively kill pests; or use a 10% imidacloprid wettable powder formulation at 2000 times dilution to spray and kill.
The above introduction to the methods for controlling diseases and pests in Peace Trees is complete. I hope it can be of help to you. Don't forget to check out more flower care tips and knowledge!