National orchid necrotic ring spot disease

Distribution: Worldwide.

Pathogen: Cyan ring spot virus (CyRV).

Host: Cattlop, Cymbidium, Spathoglottis, etc.

Symptoms: young and old leaves appear necrotic yellow ring spots or necrotic mottled, weak and short plants, new and old seedlings may die.

Prevention and control: virus disease control is mainly to eliminate the disease, improve environmental sanitation, disinfection tools and other methods to prevent its spread. Currently internationally recognized

The best disinfectants are:

I. 2% formalin and % sodium hydroxide aqueous solution (green can not be reused);

II. 164g of anhydrous or 377g of trisodium phosphate (Na3PO4) with crystal water and 1L(1000cc) of water. Can be used to disinfect tools, environment, etc. (Chen Xinqi, Ji Zhanhe)