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Symptoms: Plants cultivated in open fields are prone to dense spherical flowers, causing watery rot. When growing in a greenhouse, buds tend to darken and wither.
Pathogens: The pathogen is Botrytis cinerea Pers., which belongs to the subgenus Fungi, subsporidia, cysts, catenaries, and genus Botrytis.
Incidence pattern: Pathogenic bacteria overwinter in the body of mycelium. In the spring of the following year, conidia were produced, and conidia propagated by wind and rain. Conidia are repeatedly infested by hosts during the growing season. Diseases occur severely under warm and humid conditions.
Prevention: (1) Reduce the source of infection: Completely remove the diseased body and destroy it centrally. (2) Chemical control: In the initial stage of disease, spray 70% thiophanate WP 1000 times, or 50% Benzol 800-1000 times, spray once every 10-15 days, spray 2-3 times . Greenhouse storage period, can be sprayed with 50% carbendazim WP 800-1000 times, or 50% Benzene 1 000 times liquid control.
Pathogen and Control of Bacterial Bud Blight of Hydrangea
Hydrangea bud disease is also called Hydrangea. Harmful to the plant's buds and flowers.