Sunflower

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This is a presentation on Diseases of Sunflower & Their Management.

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Sunflower

  1. 1. 1
  2. 2. Md. Rubel Mia 12309056 2
  3. 3. Topic name: Diseases of Sunflower & Their Management. 3
  4. 4. Content About Sunflower List of the diseases by pathogen Symptoms & management of diseases Pictures of some diseases 4
  5. 5. About Sunflower English name: Sunflower Scientific name: Helianthus annuus Family: Asteraceae Genus: Helianthus 5
  6. 6. List of sunflower diseases Bacterial diseases Apical chlorosis Pseudomonas syringae pv. tagetis Bacterial leaf spot Pseudomonas syringae pv. helianthi Bacterial wilt Pseudomonas solanacearum Crown gall Agrobacterium tumefaciens 6
  7. 7. Alternaria leaf blight Alternaria alternata Downy mildew Plasmopara halstedii Powdery mildew Erysiphe cichoracearum Rust Puccinia helianthi Septoria leaf spot Septoria helianthi 7
  8. 8. Nematodes Pin Paratylenchus projectus Lesion Pratylenchus hexincisus Root knot Meloidogyne arenaria Spiral Helicotylenchus sp. Stunt Quinisulcius acutus 8
  9. 9. Viral diseases: Aster yellows Aster yellows phytoplasma Sunflower mosaic Cucumber mosaic virus Sunflower virus Tobacco mosaic virus Chlorotic Mottle Sunflower Chlorotic Mottle virus (SuCMoV) 9
  10. 10. charcoal rot - Rhizoctonia bataticola 10
  11. 11. Managemen t Closer planting of the seedling should be avoided. Treat the seeds with Carbendazim or Thiram at 2/kg Symptom s • The pathogen is seed-borne and primarily causes seedling blight • The grown up plants also show symptoms after flowering stage. 11
  12. 12. Leaf blight - Alternaria helianthi 12
  13. 13. • The pathogen produces brown spots on the leaves, but the spots can also be seen on the stem, sepals and petals. • The lesions on the leaves are dark brown with pale margin surrounded by a yellow halo. Symptoms Management Deep summer ploughing. Proper spacing Clean cultivation and field sanitation. 13
  14. 14. Rust - Puccinia helianthi 14
  15. 15. • Small, reddish brown pustules covered with rusty dust appear on the lower surface of bottom leaves. • The black coloured telia are also seen among uredia on the lower surface. Symptoms Management Previous crop remains should be destroyed. Removal of crop residues Spray Mancozeb at 2kg/ha. 15
  16. 16. Powdery mildew - Erysiphe cichoracearum 16
  17. 17. • The disease produces white powdery growth on the leaves White to grey mildew on the upper surface of older leaves. Symptoms Management  Complete field and crop sanitation.  Early varieties should be preferred. 17
  18. 18. Head rot - Rhizopus sp. 18
  19. 19. Basal rot - Sclerotium rolfsii 19
  20. 20. Necrosis -Tobacco streak virus (TSV) 20
  21. 21. 21
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