Causal Agent:
Fungus (Sclerotium rolfsii)
Characteristic Symptoms: | |
The most common symptom is the brown to black rot or sunken tissues of the stem near the soil line, which often lead to wilting and death of the plant. | |
Under moist conditions, mass of white thread-like mycelia develop on the lesion often girdling the stem base and mustard-size light tan to reddish brown, hard and round sclerotia are embedded in the mycelia. | |
Crops Affected: | |
Solanaceous (pepper, tomato, eggplant) | |
Cucurbits
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Legumes | |
Allium | |
Management and Control: | |
Avoid acidic soil.
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Application of ammonium nitrate before planting or as side dress can help reduce incidence. | |
Crop rotation with non-host like corn is effective in reducing inoculum in the soil.
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Drench with chemical fungicides like difenoconazole (e.g. ScoreⓇ, MontanaⓇ, PursueⓇ, BashⓇ), Pyraclostrobin (e.g. Cabrio 25 ECⓇ), metalaxyl+mancozeb (e.g. Ridomil Gold MZ 68 WGⓇ, Apron XL 350 ESⓇ) or carbendazim ( (Bavistin 50 DFⓇ, Goldazim 500 SSⓇ, Minx 500 SCⓇ, SuperdazimⓇ, Avert 50 WPⓇ, BiostinⓇ). |
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