|Lily leaf beetles mating|
The beetle only recently invaded the Pacific Northwest and we do not know how (or if) its seasonal lifecycle differs from other locations where it has been found. So far, the beetles have been found in Redmond, Bellevue, Renton, Issaquah, and a gardener recently found one as far south as Maple Valley.
With the help of local gardeners, WSDA is hoping to learn:
- When the beetle starts to mate and lay eggs.
- When new generations emerge each summer.
- When it stops reproducing and begins to overwinter at the end of the year.
|Confirmed lily leaf beetle sightings as of May 31, 2018|
You can help with this effort by simply scouting your lilies weekly and reporting what you see. WSU Extension and WSDA have created a website where your observations can be easily uploaded, giving us real-time mapping of this pest’s lifecycle. The lifecycle reporting website is located here. You can also find more information about the lily leaf beetle from Washington State University and in a previous WSDA blog post.
WSDA entomologist Maggie Freeman is heading up the lily leaf beetle project. You can email her with any questions about the project at firstname.lastname@example.org.
We wouldn’t be able to understand the life cycle of the lily leaf beetle locally or develop ways to control them without your help.