What medicine is used for apple mosaic disease

Apple mosaic disease occurs in most areas of China and is a common virus disease. Infected trees have shorter annual branches and fewer nodes than healthy trees, and their fruits are not resistant to storage. So, what medicine for apple mosaic disease?

1. What medicine should be used for apple mosaic disease?

For apple mosaic disease, copper moroxydine hydrochloride acetate, 1.5% Zhibingling emulsion 1000 times or chitosan 500 times can be sprayed alternately once every 10~15 days for 2~3 times.

II. Types of Apple Mosaic Disease

Apple mosaic disease is a kind of chlorosis caused by virus, which is easy to be confused with yellow leaf disease caused by iron deficiency. Apple mosaic disease is mainly manifested on leaves, forming various types of bright yellow or white spots. The symptoms vary greatly according to the severity of the disease. There are roughly 5 types:

① mottled type. The earliest and most common symptom type of mosaic disease, the irregular shape and size of the disease spots on the leaves are bright yellow, and the edges are clear. Sometimes several disease spots fuse together to become large patches.

(2) mosaic type, irregular spots, large dark green or light green spots on diseased leaves, unclear edges;

(3) stripe type, the veins of diseased leaves lose green and yellow, and extend to the nearby mesophyll tissue, sometimes only the main vein and branch veins are yellow, the other parts are green; sometimes the main vein, branch veins and small veins all present narrow yellowing, making the whole leaf appear reticulate. The diseased leaves occurred late.

(4) ring-spotted type, with bright yellow ring-like or near-ring-like stripes on the leaves, and green in the ring-like stripes;

(5) rimmed type, the edge of the diseased leaf yellows, forming a narrow yellow rimmed at the edge of the leaf, and the other parts of the diseased leaf are completely normal. Under natural conditions, various types of symptoms mostly occur in the same diseased tree. Infected trees grow slowly, diseased trees defoliate early, fruit taste is light, yield is reduced, and storage tolerance is poor.

Apple mosaic disease is harmful to apples, mainly to control. The disease has strong seasonal and regional characteristics, familiar with the occurrence of diseases and insect pests in different seasons and different regions, should be combined with the actual situation, take corresponding prevention and control measures to ensure the healthy growth of plants.