1. Anthrax: it is easy to get disease in warm and humid environment. The disease spots are mainly concentrated on the edge of leaves. The surrounding color is dark brown, and the color in the middle is light, showing brown to light brown. In the later stage, small black particles grow on the disease spots, which has an impact on the ornamental and growth of plants.
2. Powdery mildew: in leaves, young shoots, petioles and flower buds, it is easy to get sick. Irregular powdery mildew will appear on the leaves. After the disease, the leaves will gradually turn brown from the tip to the edge of the leaves, which eventually causes the whole leaves to dry and fall off. The symptoms of infection in different parts are different, the leaves will become light gray or purplish red, the internodes of young shoots will be shortened, the stems will become thin, and even dry.
3. Other diseases: in addition to these two diseases, there are black spot, scorch leaf disease, ulcer disease, etc.
In general, wild roses rarely suffer from insect damage. For artificial cultivation, scale insects, leaf wasps, sawflies, aphids, etc. may breed, which will cause damage to plants to varying degrees.
1. Disease: in the period from the end of autumn to the beginning of winter, timely remove the fallen leaves, collect the fallen leaves and burn them intensively. In addition, strengthen the maintenance, properly trim and maintain good light transmission effect. Spray in time when necessary.
2. Insect pest: take preventive measures in advance and strengthen ventilation management. If any insect is found, it can be removed manually before spraying.
