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Nematode pest of crops : Fruits

Nematode pest of Citrus

Citrus nematodeTylenchulus semipenetrans
Symptoms

  • Leaves become smaller and chlorotic
  • Leaf drop is more pronounced producing exposed branch terminals.
  • Early wilting during water stress.
  • Poor root development.
  • Dirty appearance of infected roots.
  • Faster decay of feeder roots.
  • Root death due to heavy infestation.
  • Infested trees are smaller and less productive than normal ones.

Management

  • Avoidance of infested planting materials and contaminated farm implements.
  • Provision of adequate light and water drainage
  • Use of resistant root stock.
  • Pre-plant application of carbofuran 3 G 100g/tree
  • Application of Pseudomonas fluorescens @ 20 g tree.

Banana

Banana Nematode Management


Burrowing nematode: Radopholus similis

  • Stunting of plants
  • Reduction in size and number of leaves and in bunch weight.
  • Appearance of dark red lesion on roots.
  • Toppling of plants in windstorms or heavy rains.
Affected root portion
Affected field

Lesion nematode: Pratylenchus coffeae

Lesion Nematode Lesion Nematode Lesion Nematode

Symptoms

  • Extensive black or purple necrosis on roots
  • Stunting of plants.
  • Reduction in size and number of leaves and in bunch weight.

Management

  • Fallowing for a period of six months or longer.
  • Crop rotation with non-host crops.
  • Use of disease free planting material.
  • Storage of large corms in the sun for two weeks prior to planting.
  • Use of cover crop calapogonium.
  • Removal of infested portions of corm before planting.
  • Hotwater treatment at 55o C for 15-25min.
  • Paring and Pralinage
  • Carbofuran 3 g @40g/ plant at 90 days after planting.
  • Application of neem cake
Lesion Nematode Lesion Nematode

Host: Grapevine, Papaya, Pomegranate ,Banana

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Root-knot nematodesMeloidogyne spp. and Reniform nematode: Rotylenchulus reniformis

Root knot Root Knot

Symptoms

  • Unthrifty growth
  • Susceptibility to growth, often occurring in patches.
  • Reduced yield.
  • Heavily infested plants have a much reduced root system with large elongated galls in root-knot infested plants.
  • Small galls along feeder roots in root-knot infested plants.
Infected Papaya root
Infected pomegranate root
Infected pomegranate field

Management

  • Planting stocks certified free of infection.
  • Application of carbofuran 3G @ 60g/vine.
  • Application of Pseudomonas fluorescens @ 50g/vine.

 


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