How does eucalyptus prevent purple spot?

How does eucalyptus control purple spot? Please introduce the method of eucalyptus purple spot is a common leaf disease in eucalyptus planting areas. It harms all kinds of eucalyptus. It occurs in Yunnan and Guangdong in China. Symptoms: in the early stage of the disease, scattered or dense spots are produced on both sides of the susceptible leaves, and the disease spots are polygonal or irregular, purple. Disease spots can be connected into pieces. In the later stage of the disease, small granular processes are produced on the disease spot, which is the conidium of the pathogen. When a large number of spores are produced in spring, dark brown or nearly black tendril-like conidia horns form black coal dirt on the leaf surface, which is similar to the symptoms of coal fouling disease. Pathogen: the pathogen is Eucalyptus Phaeocystis belonging to semi-known subphylum Coelospora and Chlorosporiformes. Incidence regularity: purple spot disease can be seen all year round in Kunming area. In the first and middle of March, the conidia matured and a large number of spore horns overflowed, so that part or even most of the diseased leaves were covered with a thin layer of soot. Coal fouling disease was still common in Yongsheng County in Lijiang area in December. Although purple disease spots can be seen on diseased leaves in Kunming in winter, conidia can rarely be found. Prevention and treatment: ① to reduce the source of infection: timely removal of diseased leaves, fallen leaves, and centralized destruction. ② should strengthen tending management, especially young trees, so as to make them grow healthily and enhance their disease resistance. Chemical control of ③: at the initial stage of the disease, the young trees were sprayed with Bordeaux solution of 1 1 100 Bordeaux. Click to get more eucalyptus planting techniques click to get more flower planting techniques