Hoe the crop two or three times, the first hoeing should be done before irrigating the crop. Use tractor mounted cultivator/ tractor operated rotary weeder/triphali or wheel hand hoe for weeding. Use of these instruments after fruiting should be avoided. A light irrigation should be given after 3 days of hoeing.
Root rot: Rhizoctonia bataticola (Pycnidial stage: Macrophomina phaseolina)
Symptoms
- Germinating seedling shows black lesions on hypocotyls, girdling of stem and death of seedlings.
- Affected basal stem becomes dark with bark shredding and scloretial bodies in the shredded bark.
- The entire root system gets rotted, plants dried & can be easily pulled out
Management
- Treat the seeds with Trichoderma viride @ 4g/kg or Pseudomonas fluorescens
@ 10g/kg of seed. - Treat the seeds with Carboxin or Thiram at 5 g or Carbendazim at 2g/kg.
- Spot drench with 0.1% Carbendazim or 0.05% Benomyl.
- Apply farm yard manure at 10t/ha or neem cake at 2.5t/ha.
- Adjust the sowing time, early sowing (First week of April) or late sowing (Last week of June) so that crop escapes the high soil temperature conditions.
- Adopt intercropping with sorghum or moth bean (Phaseolus aconitifolius) to lower the soil temperature.
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