How to Prevent Pecan Tree Disease

How to Prevent Pecan Tree Disease image by mildewingtoo/


Pecan trees can suffer from Cladosporium caryigenum or pecan scab fungus. It overwinters as a fungal material on leaves, shucks and stems which were infected the season before. When warmer temperatures and rainfall arrive, the fungal spores develop on the stroma, which is a thick fluid inside the chloroplast. Rain and dew cause the spores to spread through the pecan tree while wind brings them to other trees or orchards. Spraying can prevent pecan trees from falling victim to disease.

Step 1

Buy a dormant fruit spray from a nursery or garden store. Plan to apply it while the pecan trees are dormant, before spring buds surface.

Step 2

Cover nearby plants such as perennials and evergreens with a tarp. This will keep them from getting damaged.

Step 3

Check with a local pest control company to see if you can rent a high pressure sprayer. This will enable you to reach the tops of the trees better.

Step 4

Read the instructions on the bottle to find out the required measurements of water and solution. Add the correct amount of water, and secure the lid. Shake the bottle, and pump the nozzle to get the solution mixed.

Step 5

Start applying at the top and middle of the pecan tree, working your way down and out along the branches. Pump the bottle periodically to strengthen the spray.

Step 6

Apply enough so that the branches are dripping with solution. Lastly, spray the trunk.

Things You'll Need

  • Dormant spray
  • Tarp
  • Goggles
  • Protective clothing
  • Water


  • AgriLife Extension
  • Alabama Cooperative Extension
Keywords: pecan tree disease, spray trees, pecans

About this Author

Based in New York State, Kelly Shetsky started writing in 1999. She is a broadcast journalist-turned Director of Marketing and Public Relations and has experience researching, writing, producing and reporting. She writes for several websites, specializing in gardening, medical, health and fitness, entertainment and travel. Shetsky has a Bachelor of Arts in communications from Marist College.

Photo by: mildewingtoo/