Symptoms: anthrax is one of the main diseases of Camellia, with a very high incidence. At the onset of the disease, there will be the edge, tip and both sides of the vein of the leaf. At first, there will be dark green stripes, and then expand into irregular large spots. The color will also change from brown to black. At the serious stage, the whole leaf will have problems, leading to a large number of leaves falling.
Prevention and control: in winter, the diseased branches and leaves should be cut off, and the diseased leaves should be completely removed. At the beginning of the disease, a little Bordeaux can be sprayed.
Symptoms: infected with this insect pest, it will cause the back of the leaves to turn yellow, look like rust, and cause the leaves to twist.
Control: to control this pest, chlorothalonil and dicofol can be used. Infected leaves should be cut off in time.
Symptoms: scale insects will harm the leaves, fruits and branches of Camellia, lie on them and suck juice, which will cause the branches to wither and even cause the whole plant to die.
Prevention and control: if the degree of damage is still relatively light, you can remove it manually first, dip a cotton ball with a little alcohol, and then rub the worms down.
