Crop & Pest Report

Accessibility


| Share

Good Bug Corner – Tachinid Flies (08/13/15)

This week’s Good Bug Corner featured insects are the Tachinid flies in the insect family Tachinidae. The adult fly feeds on nectar of flowers and honeydew from aphids or scale insects.

Good Bug Corner – Tachinid Flies

This week’s Good Bug Corner featured insects6.ent.knodel.fly.2 are the Tachinid flies in the insect family Tachinidae. The adult fly feeds on nectar of flowers and honeydew from aphids or scale insects. But, the immature stage is an internal parasitoids of moths (adults or caterpillars), sawflies and other wasps, beetles, grasshoppers, plant bugs and other flies. Adult flies have long, bristly trichomes (or hairs) on the body and are about 5-15 mm long. Larvae are headless and legless maggots with well-developed mandibles for feeding on the internal tissues and fat bodies of its hosts. Female flies lay one or more eggs on its hosts. Larvae hatch from the eggs and burrow into the host body. Larvae will often leave the host to pupate in the soil. An example is the tachinid, Myiopharus sp., which parasitizes the adult sunflower beetle. Approximately 0.2 to 17 percent of adults in Manitoba are attacked, but studies have shown that less than 2 percent are parasitized in North Dakota and Minnesota. When scouting fields, look for a small white elongated eggs of Tachinid attached to the body of its hosts. Infested hosts will often be lethargic when infested with a parasitic larva.

Janet J. Knodel

Extension Entomologist

This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

USDA logo

Creative Commons License
Feel free to use and share this content, but please do so under the conditions of our Creative Commons license and our Rules for Use. Thanks.