Black Gram Stem canker: Macrophomina phaseolina
Symptom:
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In rice fallows, symptoms appear on 4 weeks old black gram crop as raised white cankers at the base of the stem.
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These enlarge gradually and turn as raised brown streaks spreading upwards.
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Plants are stunted and leave dark green, mottled and reduced in size.
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Normal leaves on the affected plants drop suddenly and dry.
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Flowering and podding are greatly reduced.
Management:
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Deep ploughing in summer.
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Follow crop rotation
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Soil amendment with farm yard manure @ 12.5 tonnes/ha is helpful in reducing the incidence of the disease
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Destroy the diseased plant debris by burning of burying in the soil.
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Seed treatment with T. viride @4g/kg or P. fluorescens @ 10g/ kg of seed or Carbendazim or Thiram 2g/kg of seed.
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Spot drenching with Carbendazim 1g/lit or P. fluorescens / T. viride 2.5 kg/ha with 50 kg FYM.
Source-
- TamilNadu Agritech Portal
