Crane Fly Infestation

Asked May 1, 2017, 11:29 PM EDT

We purchased a new house in Mount Angel last September and had a lawn laid in October. This April we noticed an influx of Crane Flies in the yard. The neighbors say there has been lawn damage in the neighborhood in the past from crane fly larvae. Research I've done indicates it's the European Crane Fly larvae that do damage to lawns and that they hatch in the fall. Should I be concerned about the Crane Flies that showed up in April and be doing something to control their larvae now?

Marion County Oregon lawns and turf insect issues

2 Responses

Crane fly adults (see picture) entering your lawn in April are common crane fly, which are not destructive turfgrass pests. Don't worry about these insects.

European crane fly, which are an evasive species and a destructive turfgrass pest look almost identical to the common crane fly. The adults versions of these insects will enter your lawn in September. Scout for larvae (see the second picture) of the European crane fly in November and December. If you find 25 to 50 larvae per sq ft treatment is warranted.

Thank you so much for your response, it was very helpful !