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Lentil – Viral Diseases


  • Several viruses attack lentil, including Pea Seed-Borne Mosaic Virus (PSbMV) which affects both Field Peas and Lentils; Lentil Seed-Borne Mosaic, Alfalfa Mosaic, Bean Yellow Mosaic, Cumber Mosaic and Pea Leaf Roll Virus.
  • Lentil Seed-Borne Mosaic Virus is a potential threat to lentils, as it may be introduced with infected lentil seed and spread by aphids.


  • May include downward curling of leaflets on seedlings, leaf mosaic, rosetting (developing rose-like markings), shortening of internodes, chlorotic flecks or translucent lesions, upward curling of leaves, pod distortion and stunting.
  • Tissue proliferation may occur along leaf veins and on pods.
  • Pod set may be affected in some cultivars or distorted pods may develop with seeds that have split seed coats.
  • Some varieties may be infected and show no visible symptoms, but yield is reduced.
  • Seed size and quality is often reduced.
  • Delayed maturity may also occur.


  • Use of resistant varieties and virus-free seed.
  • Control of aphid populations has not proven a reliable control method.


  • Damage is rarely serious in Western Canada because of severe winters and a relatively short growing season.
  • Can result in delayed maturity as well as reductions in yield, seed size, and seed quality.



Special thanks to Saskatchewan Pulse Growers.