Orchid leaf spot
Distribution: East Asia, Europe, South America.
Pathogen: orchid small spot virus (Orchid fleckvirus).
Parasitism: Cymbidium, Dendrobium, Odontoglossum, Oncidium and so on.
Symptoms: necrotic spots or faded yellow spots appear on the leaves.
Prevention and treatment: the control of virus disease is mainly to remove diseased plants, improve environmental hygiene, disinfect appliances and other methods, in order to prevent its spread. At present, internationally recognized
The better disinfectant is:
1, 2% formalin and% sodium hydroxide aqueous solution (can no longer be used after turning green)
(2) 164g anhydrous or 377g trinodium phosphate (Na3PO4) containing crystalline water plus 1L (1000cc). Can be used for disinfection tools, environment, etc. (Chen Xinqi, Ji Zhanhe)
Related
- Is the orchid suitable for indoor use? Is it good for the body?
- How to prevent the empty root of orchids?
- What to do after the crab claw orchid is withered?
- Why are the leaves of orchids always yellow? Fertilizing and watering.
- Can the root of the gentleman orchid be saved if it is rotten?
- Diagnosis and treatment of cotton-blowing beetle insects in Cymbidium
- There is a way for a gentleman's orchid to rot.
- What is the most suitable temperature and humidity for the orchid?
- How to raise a gentleman's orchid? Cultivation techniques of Cymbidium
- How to prepare the nutritive soil for the cultivation of Cymbidium