1. White silk disease: this disease will damage the whole plant, roots, buds and leaves. At the beginning, the leaves will lose green and turn yellow, showing a tendency of wilting. The roots will also be damaged. When the diseased plant is pulled out, the roots are densely covered with white hyphae. In the later stage, the buds and leaves will rot and the hyphae will gradually turn yellow.
2. Brown spot: this disease is also called black spot. It mainly damages the leaves, stems and flowers. It will not only affect the yield, but also reduce the ornamental value. At the beginning of the leaf, the disease spots are like water stains. The disease spots will expand into a circle. In serious cases, the disease spots will be densely distributed, leading to leaf rot.
3. Leaf blight: it is mainly caused by the damage of the part of the leaves. Small brown spots appear at the tip of the leaves, and then expand into a semicircle, and small black spots appear at the later stage.
4. Anthrax: it will cause damage to the leaves and the stems. It usually occurs on the leaves with wounds, which will cause the leaves to bend and shrink, thus affecting the growth. Especially in the environment of high temperature and humidity, it is easy to breed, and the basin soil will be too wet.
First of all, do a good job in prevention, select disease resistant varieties to plant, daily strengthen the management of fertilizer and water, pay attention to good ventilation. If the disease occurs, cut off the diseased leaves first, and then spray bactericide for disinfection.
