Annual Bluegrass Weevil Injury

The annual bluegrass weevil, previously known as the “Hyperodes weevil”, is active in the northeastern United States.  Damage becomes obvious in late May or early June.  Larvae sever stems from the annual bluegrass crown causing small yellow to tan spots.  Hollowing out of the sheath is a diagnostic key to this insect pest.  The initial spots occur along the edges of tees, collars and fairways.  If the infestations are relatively high irregular shaped patches can occur.  The turf generally appears stressed and is often confused with anthracnose or poor irrigation distribution.  This insect will generally only attack annual bluegrass (Poa annua) turf.

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