Parasitic Wasps : Chalcid wasps
categories: Natural Enemies Parasitic Wasps
last review date: 2025-08-23 05:56
Photo by: D.G. James
Biology
Chalcids are very small (1/50 to 1/16 inch) dark-colored parasitic wasps, often metallic blue or green with complex sculpturing on the body.
There are hundreds of species in the Pacific Northwest mostly attacking the eggs and larval stages of moths, flies, grasshoppers, beetles and other wasps.
Prey or Pest Targeted
- Aphids, mealybugs, caterpillars, true bugs, beetles, grasshoppers, leafhoppers, spiders, whiteflies, insect eggs
Attracting and Keeping Natural Enemies
and Pollinators in Your Yard and Garden
- Native plants provide essential resources.
- Native flora also provides natural overwintering sites.
- Natural dispersion from nearby habitats ensures visitation.
- Some kinds of beneficial insects predatory mites are commercially available.
- Avoid regular use of synthetic, broad-spectrum pesticides.
- Infrequent use of certain narrow-spectrum pesticides is more compatible with some beneficials.
- Extensive lawns are also not conducive to attracting beneficial insects.
Management Options
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Chemical Management
IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.
- None recommended
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.