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Swennen - Mitigating the impact of biotic constraints to build resilient banana systems in Central and East Africa

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Mitigating the impact
   of biotic constraints

  to build resilient banana
           systems

in Central and Eastern Afr...

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Guy Blomme, Pascale Lepoint, Eldad Karamura,

Piet van Asten, Emmanuel Njukwe, Jim Lorenzen


                            ...

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Setting the scene

A story from planting till harvest

What’s next?


                                     3

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Swennen - Mitigating the impact of biotic constraints to build resilient banana systems in Central and East Africa

Presentation delivered at the CIALCA international conference 'Challenges and Opportunities to the agricultural intensification of the humid highland systems of sub-Saharan Africa'. Kigali, Rwanda, October 24-27 2011.

Presentation delivered at the CIALCA international conference 'Challenges and Opportunities to the agricultural intensification of the humid highland systems of sub-Saharan Africa'. Kigali, Rwanda, October 24-27 2011.

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Swennen - Mitigating the impact of biotic constraints to build resilient banana systems in Central and East Africa

  1. 1. Mitigating the impact of biotic constraints to build resilient banana systems in Central and Eastern Africa Rony Swennen
  2. 2. Guy Blomme, Pascale Lepoint, Eldad Karamura, Piet van Asten, Emmanuel Njukwe, Jim Lorenzen 2
  3. 3. Setting the scene A story from planting till harvest What’s next? 3
  4. 4. Black Sigatoka 4
  5. 5. Breeding Yield increase 225% 5
  6. 6. 6
  7. 7. The pathogen can adapt: Black resistance breakdown 7
  8. 8. 8
  9. 9. Influence of farming system on black Sigatoka Farming system Youngest % Leaf area leaf spotted with symptoms Field 4.9 22.2 Homestead 6.9 17.1 LSD* (0.05) 0.9 2.1 9
  10. 10. Host response and Yield of plantain under different management practices Cultural Youngest leaf % Leaf area with Yield (t/ha) Practice spotted symptoms Control 5.5 a 19.6 d 15.8 a Vigna unguiculata 7.5 b 10.3 c 18.3 a N-P-K 8.1 b 6.9 b 21.7 b Wood sawdust 9.3 c 4.2 a 25.0 c Rice husk 10.9 d 3.8 a 29.2 d 10
  11. 11. Different infestation with a different soil fertility 11
  12. 12. The plant-disease/pest complex 12
  13. 13. CIALCA characterization study 13
  14. 14. G X E: warrants multilocational testing 14
  15. 15. Setting the scene A story from planting till harvest What’s next? 15
  16. 16. Planting: 3 different starts 16
  17. 17. Planting 17
  18. 18. Cleaning of suckers 18
  19. 19. 19
  20. 20. Planting 20
  21. 21. Banana bunchy top 21
  22. 22. Fusarium oxysporum f.sp. cubense (Foc) 22 Healthy sucker???
  23. 23. Different densities 23
  24. 24. Different densities Increased soil temperature with effects on nematodes 24
  25. 25. Banana streak virus All bananas carry the virus genome, Need to avoid stress Good agronomy 25
  26. 26. Host response and Yield of plantain under different management practices Cultural Youngest leaf % Leaf area with Yield (t/ha) Practice spotted symptoms Control 5.5 a 19.6 d 15.8 a Vigna unguiculata 7.5 b 10.3 c 18.3 a N-P-K 8.1 b 6.9 b 21.7 b Wood sawdust 9.3 c 4.2 a 25.0 c Rice husk 10.9 d 3.8 a 29.2 d 26
  27. 27. Host response and Yield of plantain under different management practices Cultural Youngest leaf % Leaf area with Yield (t/ha) Practice spotted symptoms Control 5.5 a 19.6 d 15.8 a Vigna unguiculata 7.5 b 10.3 c 18.3 a N-P-K 8.1 b 6.9 b 21.7 b Wood sawdust 9.3 c 4.2 a 25.0 c Rice husk 10.9 d 3.8 a 29.2 d Soil cover 27
  28. 28. Intercrops with cocoyam with climbing beans 28
  29. 29. With sweet potato??? 29
  30. 30. Sucker thinning 30
  31. 31. Banana Xanthomonas wilt 31
  32. 32. High mat and weevils 32
  33. 33. Weevil trapping 33
  34. 34. BXW and weevils 34
  35. 35. BXW and Sigatoka control BXW and matooke consumption 35
  36. 36. Setting the scene A story from planting till harvest What’s next? 36
  37. 37. Improved banana germplasm NSH 20 and NSH 42 FHIA 23 and FHIA 17 37
  38. 38. In vitro culture 38
  39. 39. Macropropagation need to get certified healthy planting material 39
  40. 40. Improving productivity Training on recognition, prevention, and resolving pest and disease problems in bananas 40
  41. 41. Selection criteria of farmers for banana varieties Criterion PC1 PC2 Bunch size 0.09 0.44 -0.02 Drought tolerance 0.46 -0.01 Marginal-soil 0.58 tolerance Availability 0.18 0.32 Taste 0.01 0.41 Maturation 0.05 0.41 Market 0.02 0.43 Longevity 0.60 0.02 = sustainability Pest tolerance -0.02 0.30 Toppling -0.23 0.24 Eigen Value 2.2 2.0 Total Variation % 22 20 41
  42. 42. Mitigating the impact of biotic constraints to build resilient banana systems in Central and Eastern Africa Rony Swennen

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