Common diseases of spring orchid and their control methods

Spring blue fungus disease

Fungal disease, also known as white rot, often occurs in the moldy and rainy season. In the early stage, many white hyphae will appear on the surface of the potting soil, which will hinder the absorption of nutrients by the roots and cause rhizome rot.

Prevention and control methods: Remove the infected soil, replace it with new soil, and disinfect the soil. Or spray the pesticide with 500 times diluted pentachloronitrobenzene powder.

Spring orchid black spot

Black spot disease (anthracnose) is the most common disease of orchids, especially in spring and summer when there is a lot of rain, high humidity and high temperature, and the disease is severe. Black spot disease mainly harms the leaves of spring orchids. Irregularly shaped spots will appear on the leaf surface, ranging from yellow to black. In severe cases, the entire leaf will rot. It mostly harms new buds, and in severe cases the whole plant will die.

Prevention and control methods: Ventilation should be strengthened, moisture should be controlled, and diseased plants should be removed immediately if found. Alternatively, you can use 600 times diluted 65% Mancozeb powder, 800-1000 times diluted 50% Carbendazim, or 800 times diluted Methyl-thiophanate-methyl for spraying, once every 10-15 days, for 2-3 times in a row.

Puccinia cymbidium

This is a bacterial disease that mainly harms leaves. Small raised bags containing yellow, orange, rust or even purple-black powdery spores will appear on the upper and lower surfaces of the leaves. It is also known as rust disease. In fact, rust is not fatal and the leaves will not die, but the growth will be weak, affecting the beauty of the spring orchid.

Prevention and control methods: In addition to cutting off the diseased leaves, you can spray with 500-600 times diluted 65% Zineb powder or copper-containing fungicide.