White silk disease of tulip
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.
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Occurrence and Integrated Control of Tulip Diseases
Tulip is a perennial bulb herb of Liliaceae, also known as lotus, grass musk, peony lily and so on. It is one of the most popular cut flowers in the world. With the adjustment of industrial structure, tulip fresh cut flower bases have been formed in many places in Jiangsu Province. However, in the process of production, we found that every link may be damaged by fungal, bacterial and viral diseases, thus affecting the normal growth of plants, reducing the quality and ornamental of cut flowers, and when serious, it will cause destructive harm. Therefore, it is necessary to prevent the occurrence and development of tulip diseases.
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Simple identification of poisonous mushrooms
From the color point of view, poisonous mushrooms are often bright in color, showing red, green, yellow and so on. Umbrellas often have mottled spots and filamentous or small pieces of residue or scales on the surface. The general color of non-toxic mushrooms is not bright, the cover is flat, and the umbrella surface is smooth. From the secretion point of view, poisonous mushroom cap or injured parts, often secrete Auburn thick liquid, such as spicy and other peculiar smell. It is easy to change color after the cap is torn. On the other hand, non-toxic mushrooms are generally dry, and the liquid secreted after breaking is white, with special mushrooms.
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