IPMP3.0, Oregon State University, Copyright 2000




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


[Insect Management]


Link to large image (64K) of western flower thrips


Western flower thrips adults are yellowish-brown to straw colored and about 1 to 2 mm long. Winged adults have four long and narrow wings with a fringe of long hairs along the margins. Adults overwinter in trash in protected areas. Adults become active in the spring and lay eggs inside tissues of host plants. Eggs hatch into nymphs that feed on plant juices. When mature, nymphs drop to the ground and molt into adults. Under favorable conditions, a complete life cycle may require only two weeks. There are several overlapping generations each year.

Western Flower Thrips

View the Fact Sheet for More Information

This section contains information on the management of thrips in peppermint.  The Fact Sheet contains specific information on identifcation and biology of this pest (requires Acrobat Reader)(also see Berry 1991).