1. Anthrax: the damaged leaves will form brown spots at the beginning, and then expand into large round spots, and finally cause the leaves to suffer dry. It is necessary to cut off the diseased leaves, carefully maintain them, properly apply water and fertilizer, and apply Carbendazim and captan to the wounds.
2. Brown spot: it is usually infected from the leaves with weak growth and wounds. At the beginning, the spots are brown, surrounded by yellow halos, and later the spots will turn black brown. It is necessary to strengthen the maintenance, apply a little more phosphorus and potassium fertilizer, disinfect the substrate before planting, and spray 1000 times of pentachloronitrobenzene bactericide at the beginning of the disease.
3. Blight: this disease is mainly harmful to the leaves, which will cause gray and white blight on the leaves. In addition to the quiet maintenance, cutting off the diseased leaves, it also needs spraying treatment, once every 10 days.
The main pests are pink insects, scale insects, red spiders and so on. These pests affect the plants in different degrees. At ordinary times, special attention should be paid to prevention and timely ventilation to promote air circulation, which can reduce the possibility of insect pest. If it occurs, it can be removed manually first, and the pesticide should be applied according to the type of insect pest.
