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Introduction to Identifying Symptoms of Orchid Stem Rot and Its Prevention and Treatment Methods

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For the prevention and treatment of orchid stem rot, prevention comes first, treatment second; prevention is key, and treatment can only be called rescue. In summer and autumn, with frequent rain and high humidity, orchids are especially prone to stem rot infection, making this an important stage for preventing the disease. Ventilation should be increased, and the orchid-growing area should be regularly sterilized. Starting from May, fungicides (carbendazim, chlorothalonil, junbingqing, Score, etc.) should be sprayed once a week for sterilization, including foliar spraying and comprehensive spraying of the orchid-growing area; the foliar spray should be slightly dilute, and the site spray slightly concentrated. Through years of practice, the author has found that this method can effectively prevent the occurrence of stem rot. [Treatment Methods] First, pull out the entire pot of orchids, wash them clean, and cut off both the diseased plants and the already infected orchid plants...

    For the prevention and treatment of orchid stem rot, prevention comes first, treatment second; prevention is key, and treatment can only be called rescue. In summer and autumn, with frequent rain and high humidity, orchids are especially prone to stem rot infection, making this an important stage for preventing the disease. Ventilation should be increased, and the orchid-growing area should be regularly sterilized. Starting from May, fungicides (carbendazim, chlorothalonil, junbingqing, Score, etc.) should be sprayed once a week for sterilization, including foliar spraying and comprehensive spraying of the orchid-growing area; the foliar spray should be slightly dilute, and the site spray slightly concentrated. Through years of practice, the author has found that this method can effectively prevent the occurrence of stem rot.

[Treatment Methods]

    First, pull out the entire pot of orchids, wash them clean, and cut off both the diseased plants and the already infected orchid plants. Use a blade to thoroughly trim away the rotted pseudobulbs, then use a fungicide with good sterilization effect (Score) at a slightly concentrated dilution to soak the healthy parts that should be retained after trimming the orchids, for no less than one hour, then air-dry. Next, mix metalaxyl-mancozeb into a paste and seal the pseudobulb areas of the orchids, then air-dry again. Finally, wrap the pseudobulb areas with sterilized sphagnum moss, and replant in a new pot with new soil. After planting, do not water and do not expose to sunlight; keep them separate from other orchids and place them in a ventilated spot. After three days, soak them thoroughly with clean water plus streptomycin, place them in a ventilated and breathable spot, and manage them in the usual way. Each month, soak the orchid pots again with a fungicide (slightly dilute). The orchid plants can then gradually recover their vigor. Orchid enthusiasts may wish to give it a try. Article source: http://www.yuhuagu.com

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