What to do when the orchid leaves turn yellow
Today, the editor will explain how to deal with yellowing orchid leaves and the related experience of understanding the rescue skills for withered orchid buds in flower planting. Next, the editor of this site will introduce to everyone.
Leaf yellowing is a common problem in the cultivation process, and the causes can be divided into physiological yellow leaves, pathological yellow leaves, and yellow leaves caused by pests. We need to take targeted solutions for these issues. First, physiological yellow leaves: 1. Old plant yellowing: The old orchid plants will naturally die, causing the entire leaf to turn yellow and wilt rapidly. The treatment method is to clean up the old plants in time, keeping the orchid environment clean and ventilated. 2. Insufficient nutrient supply: When orchids need a large amount of nutrients for growth or flowering, if the supply is insufficient, the leaves will also turn yellow. Apply a light fertilizer once before and after the orchid sprouts or blooms to supplement the insufficient nutrients.
Second, pathological yellow leaves: 1. Disease infection: Orchids may be affected by fungi, bacteria, and root rot, causing uneven yellow or brown spots on the leaves. For example, anthracnose forms yellow spots, while soft rot and stem rot cause the leaves to yellow from the base upwards. The treatment method is to disinfect regularly and use appropriate fungicides such as carbendazim and metalaxyl-M. 2. Fertilizer burn: When fertilizing, pay attention to applying light and frequent fertilizers, as excessive concentration can cause fertilizer burn. Fertilizer burn usually starts from the tip of the new plant's leaves and then spreads to the old plant, with irregular shapes. Adjust the amount of fertilizer to prevent fertilizer burn. 3. Drug injury: Similar to fertilizer burn, but drug injury may not start from the tip of the leaf, appearing anywhere on the leaf with irregular shapes. The treatment method is to avoid excessive use of drugs, especially on new plants.
Third, yellow leaves caused by pests: Common pests of orchids include snails, scale insects, and red spiders. They can cause yellow spots or patches after feeding on the leaves. Insecticides should be chosen appropriately, such as metaldehyde for snails, Nuprid for scale insects, and miticides for red spiders.
In the cultivation process, we need to check the condition of the orchid leaves regularly, detect yellowing in a timely manner, 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 yellowing orchid leaves. I hope the above information is helpful to you! Orchid Bar - Focusing on the dissemination of orchid knowledge since 2012!
The above is a detailed explanation of what to do when orchid leaves turn yellow and understanding the rescue techniques for withered orchid buds, for reference and suggestions only!