IPMP3.0, Oregon State University, Copyright 2000

Glassy Cutworm



Fact Sheet (requires Acrobat Reader 3.x or above to read and print. Click below to download the free "Reader".)

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Registered Insecticides


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Link to large image (96K) of glassy cutworm larva Link to large image (155K) of glassy cutworm adult
Glassy Cutworm Larva Glassy Cutworm Adult
Link to large image (124K) of glassy cutworm pupa Mature larvae are 3 cm long. The head is reddish-brown.  The body is not pigmented and appears dirty white to greenish, with a translucent, glassy appearance.  The glassy cutworm overwinters in the crowns of grass as small larvae. Larvae mature in the spring and pupate in the soil.  Adults begin emerging in late June, July, and August, mate, and lay eggs on the soil surface near the crowns of grass hosts.  Eggs hatch in about 10 days and larvae begin feeding on the crowns.  These larvae develop partially and form the overwintering stage.   In mint, larvae may be present in April and May in fields with grass weeds.   This cutworm may occur at the same time as the redbacked cutworm and the black cutworm East of the Cascade Mountains.

Glassy Cutworm Pupa

View the Fact Sheet for More Information

This section contains information on identification of glassy cutworm in peppermint.  The Fact Sheet contains specific information on identifcation and biology of this pest (requires Acrobat Reader).  Glassy cutworm, black cutworm and redbacked cutworm may occur at the same time East of the Cascade Mountains.  See redbacked cutworm for information on sampling for glassy cutworm.