Symptoms: at the beginning of the disease, there are small black spots on the leaves, which will expand into stripes, dark brown color, and the whole plant will die after the disease is serious.
Prevention and control: in the early stage of the disease, you can spray Bordeaux solution, smear the stem part with this agent, which can have a good effect, or you can smear it with 70% tobr 800 times aqueous solution.
Symptoms: This is one of the main diseases, which occurs from June to October. At the beginning of the disease, the disease spots will invade from the tip and edge of the leaves, causing the tip part of the leaves to turn brown.
Prevention and control: if the diseased leaves and branches are found, they need to be cut off in time to reduce the way of transmission and improve the ventilation conditions, which can reduce the possibility of disease occurrence. They can also be sprayed with 1000-1200 times aqueous solution of potassium permanganate with the aid of chemicals. If it is difficult to remove them at one time, they need to be removed for 2-3 times continuously.
Symptoms: in terms of insect damage, there are mainly red spider, aphid, white moth, wax cicada, scale insect, etc. all of these pests cause damage to plants to varying degrees, affect ornamental problems, and also cause damage to plant growth.
Prevention and control: before the disease occurs, pay attention to ventilation management, so as to reduce the possibility of insect pest, spray according to the type after the disease.
