Sunflower Charcoal Rot: Macrophomina phaseolina
Symptom:
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Charcoal rot is of economic importance, particularly in the arid areas.
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The most common symptom of the disease, under field conditions is the sudden wilting of plants, usually after pollination.
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Early symptoms are not visible on infected plants, but they become weak, mature early and when dry, show a presence of black ashy discolouration of the stem.
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Black microsclerotia are formed in huge number on the affected portion.
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Sometimes the disease causes seedling blight, damping off, root rot or basal stem rot.
Management:
- Soil application of P. fluorescens or T. viride – 2.5 Kg/ha + 50 Kg of well decomposed FYM or sand at 30 days after sowing.
- Spot drenching with Carbendazim @ 1 g/ litre
Source-
- TamilNadu Agritech Portal.
