1. Symptoms: mainly harmful to the leaves of renal fern. At the beginning of the disease, there will be small brown spots on the leaves. In the later stage, the disease spots gradually expanded, causing the whole leaf to wither.
2. Prevention and control method: remove and destroy the diseased leaves in time to avoid infecting other leaves. When the disease is serious, it can be treated by spraying mancozeb. Spray once a week until the disease is cured.
1. Symptoms: this kind of insect pest is easy to happen in spring and summer. It can nibble the leaf of kidney fern, make leaf incomplete. Chloroplasts in leaves are destroyed, resulting in chlorosis and long spots.
2. Control method: when the disease occurs, the leaves can be sprayed with acarid, aphid mite, Triadimefon and other drugs. Make sure that both sides of the blade can be sprayed evenly. Spray once a week, 2-3 times in a row to cure.
1. Symptoms: this kind of insect pest mainly occurs in the period when the renal fern is young. They will attach to the young leaves of renal fern, sucking the nutrients, causing the young leaves to wither.
2. Control method: spray soap water on the plant at the early stage of the disease. When the disease is serious, DDVP can be used to spray plants for treatment.
