California willow leaf beetle
The California willow leaf beetle feeds on willow
leaves. Adults are shiny olive green to black beetles.
Larvae chew pitted holes in leaf surfaces. Black
larval frass may cover part of the chewed surface
of the leaves.
Klamathweed beetles feed on and can completely defoliate
the groundcover, Hypericum calycinum.
The metallic bluish green to brown adults feed on
foliage the year round, except during the hot, dry
summer. Larvae are grayish in color; they feed on
Elm leaf beetle
Xanthogaleruca or Pyrrhalta luteola
Elm leaf beetle feeds on elms and zelkova throughout
the U. S. Larvae skeletonize the leaf surface, while
adults eat through the leaf, often in a shothole
pattern. Adults are olive green with black, longitudinal
stripes along the margin and center of the back.
Newly hatched larvae are black. Mature larvae are
a dull yellow or greenish with rows of tiny dark
tubercles that form two black stripes down the back.
Pupae are bright yellow.