Sunflower Charcoal Rot: Macrophomina phaseolina
Charcoal rot is of economic importance, particularly in the arid areas.
The most common symptom of the disease, under field conditions is the sudden wilting of plants, usually after pollination.
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.
Black microsclerotia are formed in huge number on the affected portion.
Sometimes the disease causes seedling blight, damping off, root rot or basal stem rot.
- 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
- TamilNadu Agritech Portal.