1、 Infected rust

Cause: the disease occurs around April every year. At the beginning, there will be orange spots on the leaves, and then the dots will gradually expand, the diseased part will become thicker, and the back part will bulge. With the evolution of the disease, yellow and white spores will grow in the bulged place, which will eventually lead to the death of the leaves

Solution: first do a good job in protection and avoid planting with pine and cypress, Longbai and other tree species, which can avoid the aggravation of the disease. Timely remove the diseased leaves and destroy them in a centralized way. If the condition does not improve, Triadimefon EC, nitrile azole EC and other agents can be used to spray

2、 Infected brown spot

Cause: this disease can also cause yellow spots on leaves, which is common. In the early stage of the disease, white patches will appear on the front of the leaves, and then gradually expand, the color will become yellowish brown, and the leaves will also be scorched and separated, which has a great impact on the plant

Solution: do a good job in prevention and strengthen ventilation management. If it is found that the disease is accidentally infected, the diseased leaves need to be removed in time and burned together to avoid further spread of the disease. Spraying Bordeaux liquid once can effectively control the disease