Pacific Northwest 1998 An Online Guide to Plant Disease Control

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OSU Extension Office
 
Pepper (Capsicum annuum) -- Cercospora Leaf Spot
 
Cause: Cercospora capsici, a fungus that overwinters on dead plants.
Symptoms: Round or oblong leaf spots occur which are at first water soaked and up to 0.5 inch in diameter, later becoming tan with a dark marginal ring. Centers often drop out as they age. Spots develop on stems and petioles and, when numerous, leaves turn yellow and may drop or wilt. Defoliation is often serious, exposing peppers to sun scald.
Cultural control:

  1. Destroy by burning or deeply burying old pepper refuse.
  2. Use disease-free seed for transplant production.
  3. Rotate crops.
Chemical control:

  1. Champ Formula 2 at 1.33 to 2 pt/A. 24-hr reentry.
  2. Cuprofix Ultra 40D at 1.25 to 3 lb/A on 5- to 10-day intervals. 12-hr reentry.
  3. Kocide 2000 at 1.5 to 2.25 lb/A or Kocide 3000 at 0.75 to 1.25 lb/A on 7- to 10-day intervals. 24-hr reentry.
  4. Kop-R-Spray at 1.5 to 3 teaspoons/gal water.
  5. Maneb 75 DF at 1.5 to 2 lb/A. Do not apply within 7 days of harvest. 24-hr reentry.
Content edited by: Cynthia M. Ocamb on January 1, 2009
 
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