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Role of whitefly in plant virus transmission by p.manikandan

this slide regarding some whitefly transmitting viruses

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Role of whitefly in plant virus transmission by p.manikandan

  1. 1. ROLE OF WHITEFLY IN PLANT VIRUS TRANSMISSION PRESENTED BY P.MANIKANDAN M.Sc(Agri)Entomology Chaiman: Dr.R.Kannan Assistant Professor in Entomology Annamalai university
  2. 2. Index 1.Taxonomy 2. Importance 3. Mechanism of transmission 4. Plant damage 5. Viruses transmitted
  3. 3. Taxonomy • Kingdom:Animalia Phylum:Arthropoda • Class:Insecta Order:Hemiptera • Suborder:Sternorrhyncha • Superfamily:Aleyrodoidea Family: Aleyrodidae • Species: 1550 sp. worldwide, 3 are important -114 viruses are transmitted by these 3 spp. • Bemisia tabaci -111 viruses • Trialeurodes vaporariorum -3 viruses • Trialeurodes abutilonea -3 viruses
  4. 4. VIRUS-VECTOR RELATIONSHIP • Mostly circulative • Semi persistent to persistent • Females efficient in transmission • LP-few hrs. • Phloem
  5. 5. ECONOMIC IMPORTANCE OF WHITEFLIES •High economic losses •Monophagus to Polyphagus •All stage of host •Fecundity: ~50 to 300+ offspring •Very low spray threshold •Insecticide resistance •Plant virus transmission
  6. 6. Whitefly species identification species egg nymphs adult T. vaporariorum B. tabaci
  7. 7. 8 Direct damage Type of damage Indirect damage Virus transmission
  8. 8. Mechanism of transmission 9 Contaminated diet transmission. Diet contaminated by the saliva of viruliferous insects. Sexual transmission Male to female or vice versa during copulation.
  9. 9. Cont…
  10. 10. Whitefly transmitting viruses Geminivirus (Begamovirus) Crinivirus Closterovirus
  11. 11. Geminivirus (Begamovirus)
  12. 12. Tomato yellow leaf curl virus (TYLCV)
  13. 13. Tomato torrado disease
  14. 14. Cotton leaf crumple virus
  15. 15. Cotton leaf curl virus
  16. 16. Chilly leaf curl virus
  17. 17. Mung bean yellow mosaic virus
  18. 18. Okra enation leaf curl virus
  19. 19. Pepper golden mosaic virus
  20. 20. Potato yellow mosaic virus
  21. 21. Sweet potato leaf curl virus
  22. 22. Squash leaf curl virus
  23. 23. Tomato yellow leaf curl virus
  24. 24. Cabbage leaf curl virus
  25. 25. Bhendi yellow vein mosaic virus
  26. 26. African cassava mosaic virus
  27. 27. Bean calico mosaic virus
  28. 28. Bean golden yellow mosaic virus
  29. 29. Crinivirus
  30. 30. Blackberry yellow vein-associated virus
  31. 31. Lettuce chlorosis virus
  32. 32. Cucurbit yellow stunting disorder virus
  33. 33. Cucumber yellows virus
  34. 34. Lettuce infectious yellows virus
  35. 35. Sweet potato chlorotic stunt virus
  36. 36. Tomato chlorosis virus
  37. 37. Tomato infectious chlorosis virus
  38. 38. Closterovirus
  39. 39. Citrus tristeza virus
  40. 40. Grapevine corky bark-associated virus
  41. 41. Little cherry virus 1
  42. 42. Grapevine leafroll-associated virus 1
  43. 43. Sugarcane mild mosaic virus
  44. 44. Reference • George N.agrios(2006)academic press,plant pathology p.p: 774-809 • Roger hull (2004) academic press, Mathews’Plant Virology p.p: 27-44 • http:/Whitefly,Wikipedia,the free encyclopedia.html • Diseases of vegetable crops in Australia (eds Persley, Cooke & House 2010), available from CSIRO Publishing at www.publish.csiro.au

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