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Horticultural crops :: Vegetables:: Tomato

Leaf curl :  Tomato leaf curl virus

Field Diagnostic Symptoms

  • Severe stunting of plants
  • Downward rolling and crinkling of the leaves
  • Older leaves become leathery and brittle
  • Shortening of internodes
  • Appearence of more lateral branches - bushy appearance

Infected plant

Downward curling of leaf

 

Causal organism -

  • Tomato leaf curl virus (TLCV)

Vector :

  • Whiteflies –Bemisia tabaci

Survival and Mode of Spread

Primary spread:

  • Whiteflies.

Secondary spread:

  • Movement of infected plants

Integrated Disease Management

  • Raising nursery in protected condition
  • Growing Sorghum, Maize or Bajra as barrier crop
  • Use of disease free seeds
  • Yellow sticky traps @ 5nos./ac
  • Remove alternate weed host - Abutilon indicum
  • Spraying Dimethoate 30 EC @ 200 ml/ac or Methyl demeton 25 EC @ 200 ml/ac or Thiamethoxam 25 WG @ 200 g/ac or Imidacloprid 17.8 SL @ 200 ml/ac

Source of Information

  • https:www.apsnet.org.
  • Crop production guide – Horticulture 2020.

Acknowledgement

  • Photo courtesy by Dr.P.Renukadevi, Professor, Department of Plant Pathology, TNAU, Coimbatore.

Updated on Jun 2023


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