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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

    5. Walia CCSHAU

    6. Walia CCSHAU

    7. Walia CCSHAU

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

    9. Walia CCSHAU

    10. Walia CCSHAU

    11. Walia CCSHAU

    12. Walia CCSHAU

    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