Insects and Spiders - non-native

Agrilus cyanescens on May 9, 2019

Submitter has sample
EDRR Status: Local expert notified

Description of specimen

Honeysuckle Flatheaded Borer?
Smaller than EAB, similar shape, metallic blue, makes smaller D-shaped holes than what I saw in FPD workshop.
On twinberry leaf Holes in twinberry On twinberry leaf On twinberry

Commentary

Probably Agrilus cyanescens, known hosts include Lonicera (honeysuckle). Lise is sending me insect and plant samples. I will update here once ID is made.

Wyatt Williams
May 9, 2019, 6:07 p.m.

Agrilus cyanescens. Exotic Palearctic species. Established in NE U.S. since at least the 1920s (Frost 1922; Jendek and Grebennikov 2009). This is first record of this insect in Pacific NW and perhaps west coast? Feeds on native and exotic honeysuckles (Lonicera sp.). Species confirmed by Dr. Rick Wescott, Oregon Dept. of Agriculture. Lise will be emailing me photos of affected plant. Westcott will be visiting the site and talking with Lise on Sunday, May 19, attempting to get more insect and plant samples. The host plant (native twinberry, Lonicera involucrata) was sourced as a 3-4' tall plant in a 1-gallon container from a local nursery and that she planted it 2-3 years ago. It is now 8-9' and exhibiting some dieback. She has also been trimming it back from a path in her yard. Need to confirm plant species and determine history and impacts on the plant as well as perhaps follow up with local nursery to see if other twinberries exhibit similar signs and symptoms.

Wyatt Williams
May 17, 2019, 9:04 a.m.

Galleries appear to be just under bark, maybe slightly into sapwood. Stems are 1-3 cm in diameter

Wyatt Williams
May 20, 2019, 12:01 p.m.

Good afternoon Lise,

Excellent job on detecting and reporting the Agrilus cyanescens. The Oregon Department of Agriculture is currently conducting a pest risk analysis to determine our next steps. To prevent any further movement of this pest, I would advise removing the affected parts, and either burning them or wrapping them in a paper towel and microwaving for about a minute.

Jake Bodart
May 28, 2019, 3:06 p.m.