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Apple Maggot Host Reduction Project

Project Introduction

Partnering Agencies

  • Washington State Department of Agriculture
  • North Yakima Conservation District
  • Washington State University
  • Yakima County and Chelan County


  • It currently costs $500,000 annually to manage the apple maggot and each year the cost of controlling invasive pests continues to rise.
  • $220,000 Grant over two years to prove the feasibility of host removal and replacement
  • Reducing Alternative Hosts is a better method of pest management
  • Cost of this strategy is high initially.  After 5 years is less costly than sprays.
  • Habitat Manipulation is an effective and more ecologically sound method of pest management.
  • It is beneficial to commercial growers by reducing trade barriers and removing hosts causing trouble for growers.


  • Reduced Pest Population
  • Reduced Spray Applications
  • Reduced Apple Maggot Detections
  • Increased Profitabiltiy
  • Attain/Maintain “Pest Free Status”


Pest Management Fact Sheets

Fruit Pest Management Tips: Recognizing Western Cherry Fruit Fly Rhagoletis indifferens (PDF)

Home Orchard Fruit Pest Management Tips: Recognizing Apple Maggot Rhagoletis pomonells (PDF)

Home Orchard Fruit Pest Management Tips: Codling Moth vs Apple Maggot (PDF)

Fruit Pest Management Tips:  Recognizing Walnut Husk Fly Rhagoletis completa (PDF)

Website Resources

Hortsense Fact Sheet Apple:  Apple Maggot

Pacific Northwest Pest Management Handbook – Apple:  Apple Maggot Rhagoletis polmonella

Using Integrated Pest Management in the Landscape

Removal of Neglected Hawthorn and Fruit Trees

  • Done in partnership with landowners
  • Host tree is removed and replacement trees are planted of equal or greater ecological value


WSDA mountains and fields logo with the text "Specialty crop block grant program"
A dead tree on a grassland
Cut tree branches laying on the ground
A multi-trunk tree stump in a field

Feral apple tree removal

Close up of a multi-trunk tree stump

Hawthorn tree being removed