Key points for prevention and control of mosaic disease of Phalaenopsis

Mosaic disease, also known as bad death mosaic disease, bad death black spot disease, the pathogen is the national orchid mosaic virus, important fumigation leaves. At the beginning, the outer cells of the mesophyll collapse, and the leaves are covered with sunken black spots; in severe cases, the sunken black spots are mostly connected and form linear spots along the veins of the leaves, and sometimes the sunken spots on the old leaves will melt, forming a brown bad death pattern.

Phalaenopsis mosaic disease can be infected by mechanical juice through cutting tools such as hinge shears and hands in the process of transplanting and changing pots. In addition, water from the pots of more susceptible plants can also infect mosaic disease through the wounds of healthy plants.

The host of mosaic virus is very common, in addition to Phalaenopsis, it can also infect more than 40 genera of Orchidaceae, such as Cartland, National Orchid, Cymbidium, Dendrobium, Dendrobium, Orchidaceae, etc.

Prevention and treatment of mosaic disease should be based on prevention. After inventing the diseased plant, it should be swept away immediately and burned in real time. Attention should be paid to improving hygiene, superstitious disinfection equipment, etc., in order to avoid its expansion. At present, the disinfectants commonly used are 2% formalin and 2% sodium hydroxide aqueous solution (can no longer be used after turning green). Objects and conditions can also be disinfected with 164g of anhydrous trisodium phosphate (Na3PO4) or 377g of trisodium phosphate containing crystalline water plus 1000 ml of water.