1. Leaf spot disease: it mainly causes damage to the leaves. At the beginning of the disease, there are many light yellow spots on the leaves, and then gradually expand into yellow to brown spots. The edge is not clear, and the center part turns gray white. When the humidity is high, there is a black mold layer on the back of the leaves.
2. Root rot: this disease will cause the root to show signs of corruption, which will cause the leaves below to show yellow, and then the leaves above will also be affected, eventually leading to leaf falling from below, and small black spots at the root and stem of the disease.
3. Anthrax: it mainly damages the leaves, and there are round or oval spots of black brown on them. If the number of spots increases and becomes larger, it will lead to poor plant growth and even death.
Snails and slugs are easy to appear, which may lead to small holes in the plant, eventually affecting the growth, and greatly reducing the ornamental.
1. Disease: mainly for prevention. It can be sprayed once with chlorothalonil and tolbutine, which are difficult to remove completely at one time. It needs to be sprayed once every 7-8 days, about three times in a row.
2. Insect pest: the evolution and spread speed is very fast, so once found, it needs to be removed manually in time and controlled by spraying.
