Control of Milton Orchid Mosaic Disease

Symptoms: yellow discontinuous stripes and ringed spots appear along the leaves at the beginning. Then a part of the leaf flesh cells of the disease spots necrosis, the surface into a sunken black brown necrosis disease spots. Necrotic lesions are more common on the dorsal leaf.

Pathogen: CyMV.

Route of infection: mainly infected by juice.

Prevention and control methods: prevention should be given priority to the control of orchid virus.

1. Destroy the diseased plants immediately after they are found. If it is a rare breed, it should also be isolated and strengthened management.

2. When dividing plants for reproduction, fingers and tools should be washed with soap water. Instead of washing many plants with the same bucket of water, they should be washed one by one under running water. Pots, moss, pots, etc. should also be disinfected in advance before application.

At present, the internationally recognized better disinfectants are: ①2% formalin and 2% sodium hydroxide aqueous solution (can not be reused after turning green);②164 grams of anhydrous trisodium phosphate (NaPO4) or 377 grams of trisodium phosphate containing crystalline water, add 1000 ml of water, can be used to disinfect tools, cultivation environment, etc.

3. When pollinating diseased plants as female parents, fully mature seeds should be used for sowing.

4. Plants other than Orchidaceae such as Solanaceae, Leguminosae and Chenopodiaceae may also carry toxic infection, which should be paid attention to in prevention and control.