Disease and insect pest control of Rosa rugosa

Diseases

The first disease is called "powdery mildew", which is more common in Rosaceae species. It mainly occurs under humid, poorly ventilated and poorly lit conditions. To treat this disease, we should first isolate the plants that have been found in time, and cut off the damaged branches or leaves. It is best to burn them in one go to avoid harming other parts. The next step is to spray the medicine. Generally, we can choose a low concentration of medicine for spraying to avoid the deterioration of the disease. Then comes the later stage of improving the environment. The first and most important thing is to control watering to avoid an overly humid environment, and also to increase light to improve its disease resistance.

The second disease is "brown spot", a fungal disease that mainly threatens the leaf part of the plant. As the name suggests, this disease will cause some spots to appear on the leaves. When the situation worsens, these spots will gradually connect together, and then cause the leaves to rot and fall off. The prevention and treatment of this disease is similar to the above disease. The first thing to do is to deal with the diseased part. Then spray with pesticides such as thiophanate-methyl. Then there is the post-treatment, such as applying less nitrogen fertilizer, avoiding watering it in the evening, etc.

Pests

There is mainly one type of pest called "scale insects", which I believe we are all familiar with. Its reproductive capacity is very strong, and the corresponding harm it causes is also relatively large. If the number of pests is not too large, we can brush them off with a brush or cut off some leaves and branches. However, if the number is too large, we have to spray pesticides, and we can choose omethoate liquid.