Fletcher scale

Parthenolecanium fletcheri

Hosts

Yew and arborvitae.This insect overwinters as a small, reddish brown nymph on twigs and needles. Vulnerable overwintering females (before egg production occurs) are present as redbud and Koreanspice viburnum are in bloom. Look for crawlers as elderberry or ‘Hills of Snow’ hydrangea are in bloom.

Fletcher scale
Brown ovals on twigs are scales; examine the interior branches of the shrub and look for sooty mold.

Management

This is primarily a nursery pest and is not usually observed in the landscape. In the landscape, natural enemies, including several small wasps, often control Fletcher scale

Fletcher scale
Arrow points to hole in scale caused by one of the tiny wasps that are internal parasites.

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The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.