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Pest Management Decision Guide
26 September 2017

Ascochyta blight on pea.: Ascochyta pisi; Ascochyta blight and pod spot

Author: CABIAuthors Info & Affiliations
Pest Management Decision Guides
https://doi.org/10.1079/pwkb.20177801151

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Blight of pea (Courtesy of The Food and Environment Research Agency (Fera), Crown Copyright)
Pea Ascochyta blight (Guo Shupu, II-AAAS)

Prevention

•
Use certified clean seed
•
Plant a resistant cultivar if available
•
Plant crop as early as possible to increase yield potential
•
Plant pea seeds about 5 cm deep and when the average temperature is 15-20°C. Optimal planting conditions will increase germination rates and general vigour, making the plants less susceptible to infection
•
Do not plant crop downwind of an infected field, or adjacent to one, since the disease can be spread by wind and water (splashing)
•
Rotate with crops other than beans and peas (legumes) for at least three years since Ascochyta can remain in the soil for this long
•
Carry out straw chopping during combining or harrowing. This will help speed up the decomposition of the residues on which Ascochyta can live.

Monitoring

•
Additional relevant crops: soybean, sweet pea, lentil, alfalfa, common beans, clover, black-eyed pea, broad bean
•
Scout for symptoms during vegetative stage and throughout flowering
•
Look for:
•
Purplish brown spots or lesions varying in size on stems, tendrils and pods. Lesions are sunken, enlarge and gradually join together, causing blighting and weakened stems
•
Brown pin-head sized dots within the lesions
•
Seeds: smaller yield, discoloured, shrunken
•
Consider control options as soon as symptoms are noticed. If symptoms do not move up past the lower two thirds of the plant canopy then crop losses may not be that large
•
Monitor crop particularly closely when temperature is around 20°C and humidity is high for a prolongued period - these are optimal conditions for Ascochyta development
•
Symptoms can be similar to those caused by Ascochyta pinodes and A. pinodella. However, A. pisi does not usually attack the base of the plant or cause foot rot like A. pinodes and A. pinodella does

Direct Control

•
Bury infested crop residue with cultivation
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Indexing Terms

Descriptors

  1. clovers
  2. control
  3. cowpeas
  4. cultivars
  5. cultural control
  6. disease control
  7. disease resistance
  8. extension
  9. faba beans
  10. fungal diseases
  11. lentils
  12. lucerne
  13. monitoring
  14. pathogenicity
  15. pathogens
  16. peas
  17. pest management
  18. pests
  19. plant disease control
  20. plant diseases
  21. plant pathogenic fungi
  22. plant pathogens
  23. planting date
  24. planting stock
  25. soyabeans
  26. sweet peas
  27. varietal resistance
  28. varieties

Organism Descriptors

  1. Ascochyta
  2. Ascochyta pisi
  3. fungi
  4. Glycine (Fabaceae)
  5. Glycine max
  6. Lathyrus
  7. Lathyrus odoratus
  8. Lens
  9. Lens culinaris
  10. Medicago
  11. Medicago sativa
  12. Phaseolus
  13. Phaseolus vulgaris
  14. Pisum sativum
  15. Trifolium
  16. Vicia
  17. Vicia faba
  18. Vigna
  19. Vigna unguiculata

Identifiers

  1. climate smart agriculture
  2. alfalfa
  3. Ascochyta blight
  4. cultivated varieties
  5. field beans
  6. fungus
  7. pest management decision guides
  8. phytopathogenic fungi
  9. phytopathogens
  10. plant-pathogenic fungi
  11. soybeans
  12. tic beans
  13. Ascochyta blight and pod spot
  14. common beans
  15. Ireland
  16. pod spot
  17. black-eyed peas
  18. southern peas
  19. resistance to disease
  20. advisory services
  21. extension activities
  22. broad beans
  23. horse beans
  24. fava beans
  25. pea
  26. planting materials
  27. Britain
  28. United Kingdom
  29. subsaharan Africa
  30. Nyasaland
  31. Tanganyika

Geographical Locations

  1. UK
  2. Africa South of Sahara
  3. Malawi
  4. Tanzania
  5. Africa
  6. Australia
  7. Canada
  8. India
  9. Jamaica
  10. Kenya
  11. Nepal
  12. New Zealand
  13. Pakistan
  14. Papua New Guinea
  15. Rwanda
  16. South Africa
  17. Uganda
  18. Zambia
  19. Zimbabwe

Broader Terms

  1. Didymellaceae
  2. Pleosporales
  3. Dothideomycetes
  4. Pezizomycotina
  5. Ascomycota
  6. fungi
  7. eukaryotes
  8. Ascochyta
  9. Papilionoideae
  10. Fabaceae
  11. Fabales
  12. eudicots
  13. angiosperms
  14. Spermatophyta
  15. plants
  16. Glycine (Fabaceae)
  17. Lathyrus
  18. Lens
  19. Medicago
  20. Phaseolus
  21. Pisum
  22. Vicia
  23. Vigna
  24. British Isles
  25. Western Europe
  26. Europe
  27. Commonwealth of Nations
  28. high income countries
  29. OECD Countries
  30. very high Human Development Index countries
  31. Africa
  32. ACP Countries
  33. Anglophone Africa
  34. East Africa
  35. Africa South of Sahara
  36. Least Developed Countries
  37. low Human Development Index countries
  38. low income countries
  39. SADC Countries
  40. lower-middle income countries
  41. APEC countries
  42. Australasia
  43. Oceania
  44. North America
  45. America
  46. medium Human Development Index countries
  47. South Asia
  48. Asia
  49. Caribbean Community
  50. Greater Antilles
  51. Antilles
  52. Caribbean
  53. high Human Development Index countries
  54. upper-middle income countries
  55. New Guinea
  56. Melanesia
  57. Pacific Islands
  58. Francophone Africa
  59. Southern Africa

Information & Authors

Information

Published In

cover image PlantwisePlus Knowledge Bank
Pest Management Decision Guides
Pest Management Decision Guide: Green List

Copyright

© CABI 2017. This article is published under aCreative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0)Published under a CC-BY-SA 4.0 licence

History

Issue publication date: 1 January 2016
Published online: 26 September 2017

Language

English

Authors

Affiliations

CABI
CABI Wallingford UK
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