Control of Bud Blight of eight Immortals
Botrytis cinerea is also called Botrytis cinerea. Harm the buds and flowers of the plant.
Symptoms: plants cultivated in the open field tend to occur in dense clusters of spherical flowers, causing them to rot in the form of water stains. When cultivated in greenhouse, buds are easy to blacken and wither.
Pathogen: the pathogen is Botrytis cinerea (BotrytiscinereaPers.), which belongs to the subphylum Trichospora, Trichospora, Trichoderma and Botrytis.
The regularity of the disease: the pathogen overwintered with mycelium in the disease residue. Conidia were produced in the spring of the following year, and the conidia spread and infected the plant by wind and rain. Conidia can repeatedly infect the host during the growing season. Under warm and humid conditions, the disease occurs seriously.
Prevention and treatment:
(1) reduce the source of infection: thoroughly remove the disabled body and destroy it centrally.
(2) Chemical control: at the initial stage of the disease, 70% topazine wettable powder was sprayed 1000 times, or 50% benzoate 800-1000 times, every 10-15 days, 2-3 times. During the storage period in greenhouse, 50% carbendazim wettable powder can be sprayed 8-1000 times, or 50% benzoate 1000 times.
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How to promote the change of flowers and colors of the eight Immortals
The eight immortal flowers belong to Saxifragaceae and Saxifragaceae, with emerald leaves, large inflorescences and changeable flower colors. It is one of the potted flowers welcomed by urban residents in recent years. Due to the difference of the soil or medium used for planting, as well as the organic fertilizer or nutrient solution applied.
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Experience in planting and cultivation of eight Immortals
1. Planting can be planted in the south, overwintering in the open field, and planted before sprouting in spring. Potted plants should be planted in the north, overwintering indoors, and can be planted or changed after falling leaves to before sprouting in the following spring. 4 parts of rotten leaf soil, 4 parts of garden soil and 2 parts of river sand were fully mixed in basin soil.
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