Honeylocust plant bug

Honeylocust plant bug, Blepharidopterus (Diaphnocoris) chlorionis, is a relatively new pest in Oregon. It's presence in Oregon has been confirmed in 2008. It has likely escaped detection for several years due to the cryptic coloration of the nymphs and adults which allow them to blend into the green of the foliage and stems. At this time they have been found in landscape settings. They may become a pest in nursery production but current management of honeylocust pod gall midge may also be managing this new pest.

There is one generation of this insect which overwinters as eggs. Activity begins with bud expansion of honeylocust when the nymphs hatch (eclose) and begin to feed on new growth. This feeding can cause stippling and growth distortion. Adults can be found about a month after nymphs appear and they also feed on new growth. Heavy feeding can cause defioliation.

Chemical control timing is focused on the newly expanding buds.

Web resources:

Penn State's Woody Ornamental Integrated Pest Management Honeylocust plant bug fact sheet

Penn State Cooperative Extension Entomological Notes: Honeylocust plant bug

University of Minnesota Pests of Trees and Shrubs: Honeylocust plant bug

Honeylocust plant bug damage

Photo: Rosetta

Honeylocust plant bug damage

Photo: Rosetta

Honeylocust plant bug adult

Photo: James Young

Honeylocust plant bug adult

Photo: Rosetta

Honeylocust plant bug nymph

Photo: Rosetta

Page last modified 7/2/08