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Crop Protection :: Crop Nematodes of Vegetables

Root knot nematode: Meloidogyne incognita

Hosts: Tomato, Brinjal, Chillies, Bhendi, Snake gourd

Symptoms

Root knot infested tomato plants Ribbed gourd root
Root knot infested bhendi plants Root knot infested Chilli plants
  • Presence of galls on the roots (large fleshy galls in Snake gourd, large and firm galls in other vegetable crops, very small galls in chillies).
  • Plants wilt rapidly especially under dry growing conditions and are often stunted.
  • Growth may be retarded and leaves may be chlorotic.
  • In cases where seedlings infestation has taken place, numerous plants die in the seed bed and seedlings do not survive transplanting.
  • In those plants that do survive, flowering and fruit production is strongly reduced.
  • The losses caused by Meloidogyne on root and tuber crops like carrot both quantitatively and qualitatively, because nematode galling affects marketability.

Management

  • Only seedlings with roots free of galls should be selected for transplanting.
  • Application of Pseudomonas fluorescens @10g/m2  in nursery.
  • Crop rotation with non-hosts or resistant crops.
  • Proper weed control
  • Destruction of galled roots after harvest.
  • Soil solarization with clear plastic tarps during summer.
  • Use of resistant cultivars.
  • Application of carbofuran 3G @ 1kga.i./ha (33 kg/ha).
 

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