Description for the Search Block

Use advanced search to narrow down your search results. You can filter your searches by selecting the category checkboxes below

Common blight

Featured Photo
Other Photos
Is this a Minor Pest?
Yes
Minor Pest Title

Common blight (Xanthomonas axonopodis pv. phaseoli)

Minor Pest Description

This disease is a constraint to bean production in Kenya. Crop losses of between 10 and 75% have been reported. The common blight produces similar symptoms on leaves, pods, stems and seeds. Small water-soaked spots are the first symptoms observed on leaves and appear within 4 to 10 days of infection. As the spots develop, the centre becomes dry and brown. The lesion is surrounded by a narrow band of bright yellow tissue. However, yellowed tissue is occasionally absent.

Minor Pest What to do.
  • Intercropping bean with maize was shown to reduce the severity of common bacterial blight during 1987-88 in Tanzania.
  • Use certified disease-free seed.
  • Plant resistant varieties (e.g. French bean variety 'Paulista').
  • Plough under bean debris after harvest.
  • Practise a 2-3 year crop rotation without legumes.
  • Do not work in bean fields when the plants are wet.
  • If blight is observed on scattered plants, spot application of copper hydroxide could be considered.
Minor Pest Position
1
Minor Pest Firstcontent
118
Pest Type
bacterial
Host Plants
Beans (Revised)