How to Spray Apple Trees After the Leaves Are On


Apple trees are subject to pest and disease problems from the moment that they put out their first blossoms to the point where the leaves fall off seasonally. Because of this, farmers and home owners who want to produce a healthy apple crop must constantly spray their trees to reduce the chances of pests, mildew and disease. Spraying an apple tree once the leaves are on is no more difficult than spraying them at any other time during a season.

Step 1

Select a multipurpose fungicide and insecticide formulated for apples to spray your tree. You may have to switch fungicide and insecticide brands periodically over the year to prevent pests and disease from building a tolerance to the spray.

Step 2

Mix the chemicals according to the package instructions. Some chemicals come in concentrated form that must be mixed with water.

Step 3

Pour the mixed chemicals into the holding tank of a chemical sprayer. Prime the pump of the sprayer to build pressure by grasping the pump lever up and down.

Step 4

Grasp the holding tank in one hand, and the application wand in the other hand.

Step 5

Activate the wand by squeezing the trigger to release a fine spray of chemical.

Step 6

Apply the chemical to the tree by waving the wand over the tree using broad, even strokes.

Tips and Warnings

  • The long term effects of many chemicals is not completely known. Always wear the correct protective clothing, including a breathing mask and gloves when working with chemicals. Take a shower immediately after handling chemicals.

Things You'll Need

  • Multipurpose fungicide and insecticide formulated for apples
  • Chemical sprayer


  • NC State University Extension: Growing Apple Trees In The Home Garden
  • Iowa State Univeristy Extension: The Midwest Tree Fruit Pest Management Handbook
  • Texas A&M Extension: Home Fruit Production - Apples

Who Can Help

  • University of Minnesota Extension: Insecticide Suggestions
Keywords: spraying apple trees, growing apples, insecticide spray

About this Author

Tracy S. Morris has been a freelance writer since 2000. She has published two novels and numerous online articles. Her work has appeared in national magazines and newspapers, including "Ferrets," "CatFancy," "Lexington Herald Leader" and "The Tulsa World."