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Expression of Damage General Symptomatology

Expression of Damage General Symptomatology. Above-ground Symptoms by root parasites. Annual crops Stunting in patches Yellowing of foliage Wilting Perennial crops Dieback. Early symptoms of damage by CCN in Wheat. Above-ground Symptoms by shoot parasites. Dead or Devitalized buds

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Expression of Damage General Symptomatology

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  1. Expression of DamageGeneral Symptomatology Walia CCSHAU

  2. Above-ground Symptoms by root parasites • Annual crops • Stunting in patches • Yellowing of foliage • Wilting • Perennial crops • Dieback Walia CCSHAU

  3. Walia CCSHAU

  4. Walia CCSHAU

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  8. Early symptoms of damage by CCN in Wheat Walia CCSHAU

  9. Walia CCSHAU

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  13. Walia CCSHAU

  14. Above-ground Symptoms by shoot parasites • Dead or Devitalized buds • Aphelenchoidesfragariaeon strawberry • Crinkling and curling of leaves • Anguinatriticion wheat • Gall formation • Anguinatriticion wheat • A. balsamophilaon balsam • Subanguinaagropyrion base of grass stem • Necrosis or Discolouration • Bursaphelenchuscocophiluson coconut • Leaf spots, lesions • Aphelenchoidesritzemabosi Walia CCSHAU

  15. Basal swelling, Crinkling and Curling Walia CCSHAU

  16. Seed galls or Cockles Walia CCSHAU

  17. Anguina tritici on wheat Walia CCSHAU

  18. DiscolourationRed ring disease of coconut Walia CCSHAU

  19. Leaf spotsFoliar nematode, Aphelenchoidesritzemabosi Walia CCSHAU

  20. Below-ground symptoms • Root galls • Meloidogyne spp. • Nacobbus batatiformis on sugarbeet • Subanguina radicicola on cereals and grasses • Hemicycliophora arenaria on lemon • Xiphinema diversicaudatum on roses • Reduced root system • Coarse roots • Belonolaimus longicaudatus on maize • Stubby roots • Trichodorus & Paratrichodorus spp. Walia CCSHAU

  21. Below-ground symptoms • Root lesions • Lesion nematode, Pratylenchus spp. • Burrowing nematode, Radopholus similis • Spiral nematode, Helicotylenchus multicinctus on banana • Root rot • Potato rot nematode, Ditylenchus destructor • Scutellonema bradys on yam • Excessive root branching • Meloidogyne hapla on tomato • Swellings • Heterodera avenae on wheat and barley Walia CCSHAU

  22. Root galls Walia CCSHAU

  23. Root galls Walia CCSHAU

  24. Coarse roots Walia CCSHAU

  25. Stubby roots Walia CCSHAU

  26. Necrosis Walia CCSHAU

  27. Necrosis Walia CCSHAU

  28. Rotting Walia CCSHAU

  29. Rotting Walia CCSHAU

  30. Excessive root branching Walia CCSHAU

  31. Swellings Walia CCSHAU

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