What to do if the leaves of the orchid turn yellow
Abstract: This article introduces the reasons and solutions for the yellowing of orchid leaves, as well as the small experiences of green plant maintenance. Let's take a look together!
Leaf yellowing is a common issue in the cultivation process, and the causes can be divided into physiological yellowing, pathological yellowing, and yellowing caused by pests. For these issues, we need to take targeted measures. First, physiological yellowing: 1. Old plant yellowing: The old orchid plants will naturally die, causing the entire leaf to turn yellow and wither rapidly. The treatment method is to clean up the old plants in time, maintaining a clean and ventilated environment for the orchids. 2. Insufficient nutrient supply: If the orchid does not receive enough nutrients for growth or flowering, the leaves will also turn yellow. Apply a light fertilizer once before and after the orchid sprouts or blooms to supplement insufficient nutrients.
Second, pathological yellowing: 1. Disease infection: Orchids may be affected by fungi, bacteria, and root rot, leading to uneven yellow or brown spots on the leaves. For instance, anthracnose can cause yellow spots, while soft rot and stem rot can cause the leaves to turn yellow from the base upwards. The treatment method is to disinfect regularly and use appropriate fungicides such as carbendazim and chlorothalonil. 2. Fertilizer burn: When fertilizing, pay attention to applying light fertilizers frequently; excessive concentration can cause fertilizer burn. Fertilizer burn generally starts from the tip of the new plant leaves, then to the old plant, with irregular shapes. Adjust the amount of fertilizer to avoid fertilizer burn. 3. Drug injury: Similar to fertilizer burn, but drug injury does not necessarily start from the leaf tip and can appear anywhere on the leaf, with irregular shapes. The treatment method is to avoid excessive use of drugs, especially on new plants.
Third, yellowing caused by pests: Common pests of orchids include snails, scale insects, and red spiders. They cause yellow spots or patches after feeding on the leaves. Insecticides should be chosen appropriately, such as using aluminum trichloride to kill snails, flower protectants to kill scale insects, and miticides to kill red spiders.
In the cultivation process, we need to check the condition of the orchid leaves regularly, detect yellowing in time, and take corresponding measures. Keeping the environment clean and ventilated, applying the right amount of fertilizer, disinfecting, and controlling pests regularly are all effective methods to prevent and solve the problem of orchid leaves turning yellow.
The comprehensive methods introduced above about what to do if the leaves of the orchid turn yellow and the detailed explanation of the causes and solutions for yellowing orchid leaves, hope they can serve as a starting point to solve your green plant problems.