Grey leaf spot

A.A. Seif, icipe
Is this a Minor Pest?
Minor Pest Title

Grey leaf spot (Cercospora zeae-maydis

Minor Pest Description

Symptoms are similar to Southern leaf blight but the spots are much narrower. They are initially light brownish in colour, and with age they bleach to ashen grey surrounded by narrow light-brownish border. When wet, spore mass is formed on the spots with a light shade. This disease is favoured by prolonged periods of high relative humidity. It can cause yield losses of 30 to over 50%.

Minor Pest What to do.
  • Use resistant varieties if available.
  • Practise field sanitation. It helps in reducing the inoculum (infection) source.
Minor Pest Position
Minor Pest Firstcontent
Pest Type
Host Plants