MySheen

White silk disease of tulip

Published: 2024-11-24 Author: mysheen
Last Updated: 2024/11/24, Symptoms: the whole plant withered, the stem base wrapped around white fungus or rapeseed tea brown sclerotia, the affected part became brown and rotten. A large number of white fungi and tea-brown fungi can be seen on the soil surface. Pathogen: SclerotiumrolfsiiSacc. It is called neat micronucleus disease, which belongs to the subphylum of semiknowns. The hyphae were white silk-like, fan-like or radial expansion, and then gathered into fungal cords or entangled sclerotia. Sclerotia is like rapeseed, the initial white to yellow-white, and then become tea-brown, round, smooth surface. In addition, there are reports of Corticiumrolfsi

Symptoms: the whole plant withered, the stem base wrapped around white fungus or rapeseed tea brown sclerotia, the affected part became brown and rotten. A large number of white fungi and tea-brown fungi can be seen on the soil surface.

Pathogen: SclerotiumrolfsiiSacc. It is called neat micronucleus disease, which belongs to the subphylum of semiknowns. The hyphae were white silk-like, fan-like or radial expansion, and then gathered into fungal cords or entangled sclerotia. Sclerotia is like rapeseed, the initial white to yellow-white, and then become tea-brown, round, smooth surface. In addition, it is reported that Corticiumrolfsii (Secc.) Curzi. It is also the pathogen of the disease.

Route of infection:

① bacteria overwintered in the soil with sclerotia or fungal cords. When the conditions were suitable in the next year, sclerotia or mycelium produced hyphae for primary infection.

The filamentous hyphae produced by ② disease plants extended to contact adjacent plants or sclerotia were re-infected by water transmission, resulting in the spread of the disease, continuous cropping or soil clay weight and low-lying or high-temperature and humid years or seasons.

Prevention and treatment methods: diseased plants were removed and burned in time, and 5% Jinggangmycin water agent 1000 × 1600 times, or 50% tianan water agent 500 times 600 times, or 20% methyl rifampicin EC 1000 times, or 90% dimethophos wettable powder 1000 times, each plant (hole) was irrigated with 0.4 × 0.5 liter. Combined with ploughing, 100,150kg lime powder per mu can slightly alkalize the soil and inhibit the breeding of Xanthomonas campestris.

 
0