What diseases does a Euphorbia obesa have?
As a popular ornamental plant among succulent enthusiasts, Euphorbia obesa is susceptible to various diseases. This article systematically sorts out the characteristics of its three major common diseases, combining scientific control methods to help plant lovers accurately identify symptoms and achieve effective prevention and control.
Key Points for Disease Prevention and Control in Euphorbia obesa
Soft Rot: A Collapsing Bacterial Disease
The plant stands upright but the stem is soft, and a yellowish-white malodorous mucus can be seen when cut open, primarily transmitted through insects or contaminated soil. It is recommended to use a three-step prevention and control method: ① expose the soil to sunlight for 3 days and mix in carbendazim (at a ratio of 1:800) ② control watering frequency to keep the substrate dry ③ isolate and spray streptomycin solution on diseased plants immediately.
Wilt: A Vascular Bundle Disease
Brown roots lead to obstructed water transport, causing leaves to dry and fall off from bottom to top. Focus on soil disinfection, and recommend the high-temperature steam sterilization method: place the cultivation soil in a sealed bag and steam it for 30 minutes, then mix with perlite after cooling. Diseased plants can be watered with hymexazol solution (once every 10 days, for 3 consecutive times).
Leaf Spot: A Fungal Leaf Disease
Initially presents as tiny black spots, later expanding into irregular patches. In addition to promptly removing diseased leaves, it is recommended to alternate the use of chlorothalonil and mancozeb (both at a concentration of 1:1000), and improving ventilation can enhance control effectiveness. Spraying protective fungicides before the rainy season can reduce the incidence rate.
By regularly checking the plant's condition, maintaining a well-ventilated and well-lit growing environment, and standardizing water and fertilizer management, the incidence of Euphorbia obesa diseases can be significantly reduced. It is recommended to use bio-fungicides every quarter to improve the soil microecology, creating a natural protective barrier for the plants.