1. Symptoms: mainly harmful to the leaves of Garden crotons. The surface of the damaged leaves will form a black mold layer, like black soot. This disease will hinder photosynthesis of leaves, slow down the growth rate of plants, and even cause branches and leaves to die.
2. Prevention and control method: if any disease is found, it shall be cleaned up and burned in time. After the onset of the disease, Bordeaux or carbendazim should be sprayed for treatment.
1. Symptoms: mainly harmful to the leaves of Garden crotons. In the early stage of the disease, there will be yellow brown spots with slight depression on the leaves, and in the later stage, the spots will gradually expand. The infected leaves will dry up quickly, and the whole plant will die if it is serious.
2. Prevention and control method: if any disease is found, it shall be pulled out in time and burned intensively. When the disease occurs, the leaves can be sprayed with Bordeaux solution for sterilization.
1. Symptoms: it mainly damages the shoots and leaves of plants. The diseased leaves will shrink downward and cause the plant to be short. At the same time, it may spread virus disease and cause more damage to plants.
2. Prevention and control method: when the disease occurs, the plant can be treated by spraying 1000 times the liquid of dimethoate or diluting 1000-2000 times the liquid of emulsion.
