1. Symptoms: caused by physiological potassium deficiency, virus, pathogen invasion, etc.
2. Prevention and control method: Mix 1 jin of sulfur brass, 3 jin of lime, 10 jin of water and 0.5 Jin of edible oil evenly, and apply them to the glue flowing part. When daubing, do not scrape off the flow adhesive artificially, otherwise it will aggravate the disease. Apply once in 3-5 days, 2-3 times in a row.
1. Symptoms: when the disease occurs, there are many white Auricularia on some parts of the branches.
2. Prevention and treatment method: pour 10 jin of water and 1 jin of edible salt into the pot at the same time and boil them, and brush them on the branches of the diseased plant after cooling. Brush once every half a month, twice in total can effectively kill the bacteria and viruses, and thoroughly cure the Nanking cherry tree. This method should be carried out from dormancy to germination.
1. Symptoms: high temperature and high humidity will cause yellow edge of leaves, and even the whole leaves will turn yellow.
2. Control method: 0.4% ferrous sulfate solution and pesticide can be used to spray on fruit trees for 3-5 days.
1. Symptoms: most of them are caused by sulfur deficiency of plants. It will lead to dead shoots and branches on the top of the tree body, and spread to the whole tree body, eventually leading to the death of the tree body.
2. Prevention and control method: mix sulfur powder and soil evenly, and then apply it to the crown projection soil. A Nanking cherry tree can be supplemented with 2-3 liang of sulfur powder.
