Pathogen and pathogenicity. The pathogen was P. ostreatus. The pine cyst rust was the main parasite, and the host was peony and pine, and the herbaceous hosts were peony and wind fairy. Spores and rust spores were produced on rusty pine trees from April to June. The rust spores spread to herbaceous plants by wind and rain, and the herbaceous plants were infected. Summer spores can be duplicated on herbaceous hosts. In the late stage of growth, teliospores are produced, and the cysts produce germination spores. The spores were soaked in pine trees and overwintered on them.
Prevention methods: 1 Strengthen the cultivation and management, and the plants should be planted in a high-lying, well-drained area. 2 autumn did not clear the diseased plant and diseased body of the herbaceous host and spray a new high-fat film to form a layer of polymer film, spread of infection prevention. 3 During the onset of disease, 15% triadimefon 800 times was used in conjunction with general tree nurse spraying.
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