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Carnation Fusarium wilt

Published: 2024-11-05 Author: mysheen

Last Updated: 2024/11/05, 1. The susceptible part of the symptom becomes yellowish brown or brown dry rot, which spreads upward quickly, the stem shrinks, and the xylem shows yellowish brown or purple brown rot. The leaves of the aboveground parts of the diseased plants lost their luster and became soft, and the leaves near the root neck first withered and sagged. With the rapid development of the disease, the plant withered quickly; if the bacteria invaded from one side of the plant, it first showed half of the wilt. When the environment is wet, color filaments can be seen at the rot of the root neck, which is the fruiting body of the pathogen. two。 Pathogenic half-known bacteria subphyllosporum Fusariumdianth

1. symptoms

The infected parts turn brown or brown and dry rot, spread upward quickly, the stem shrinks, and the xylem can be seen yellow brown or purple brown rot by dissection. The leaves on the ground of diseased plants lose luster and become soft, and the leaves near the root neck are first withered and drooping. The disease develops rapidly and the plant withers quickly; if the pathogen invades from one side of the plant, it will first show half withering. When the environment is wet, the colored filaments can be seen at the root neck rot, which is the fruiting body of the pathogen.

2. pathogenic

Fusarium dianthi Prill. et Del., Phylum Hemiphyta, Hyphomycetes, Nodules, causes Phytophthora oxysporum wilt. Spores pale white purple, large conidia sickle-shaped, colorless, one end straight, one end slightly curved. Most have 3 or 5 septa; small conidia ovoid or ellipsoid, unicellular, colorless; chlamydospores terminal or intermittent, spherical.

3. occurrence and development

Often occurs in April to June, the bacteria in the plant residue or soil in the satiation of life, when the climate conditions are appropriate, they produce conidia, rain, irrigation water transmission, more from the wound invasion harm. Continuous rain in spring and summer, higher soil temperature, ponding in plant basin, environment shade, the disease is more serious.

4. control methods

(1) Soil disinfection.

(2) Eliminate the source of infection: severe disease plants should be pulled out immediately, light disease plants can be removed by the method of plant separation, and thoroughly remove the residual roots and diseased leaves, change pots and soil.

(3) Chemical control: 0.5% potassium permanganate, or 3% ferrous sulfate, or 70% dexone 500 times solution is drenched in the original pot flower.

Very cool article!