Cereal leaf beetle
- Adult: About ¼" long with rust-red legs and a metallic bluish-black head and wing covers.
- Larvae: Yellowish grubs with dark head and legs; however, coloring is usually obscured by a black glob of mucus and fecal matter on the body that gives a shiny black appearance.
- Eggs: Elliptical and yellow to brownish yellow. Laid singly or in scattered groups on the upper leaf surface.
Timing of damage: Spring
Type of damage: Defoliation and skeletonization of leaves. Larvae eat long strips of green tissue from between leaf veins.
Scouting: Scout after majority of eggs have hatched. Take samples from 10 random sites,
avoiding field edges. At each site, check 10 tillers for eggs and larvae.
Economic threshold: 25 eggs and/or larvae per 100 tillers.