Larger Elm Leaf Beetle – Monocesta coryli

Larger Elm Leaf Beetle– Monocesta coryli Common Name: Larger Elm Leaf Beetle Latin Name: Monocesta coryli Appearance: The Larger Elm Leaf Beetle is a 6-9 mm long beetle with a shiny black body and yellowish-brown markings on its elytra (wing coverings).

• Egg:The eggs of the Larger Elm Leaf Beetle are laid in groups of 4-15 on the underside of leaves.
• Pupae:The Larger Elm Leaf Beetle pupae are usually found in the soil near the base of host plants.
• Larva:The larva of the Larger Elm Leaf Beetle is a caterpillar-like grub that feeds on the leaves of host plants. It is yellowish-brown in color with black spots and measures about 10 mm in length when fully grown.
• Adults:The adult Larger Elm Leaf Beetle is a beetle that is active during the day and can fly.

Host plants: The Larger Elm Leaf Beetle feeds on various trees in the Elm family, including American Elm, Siberian Elm, and Winged Elm. Territory: The Larger Elm Leaf Beetle is found throughout North America. Damages caused by Larger Elm Leaf Beetle: The larvae of the Larger Elm Leaf Beetle feed on the leaves of host plants and can cause significant damage, including defoliation and reduced growth. The adult beetles also feed on leaves and can further damage the host plant. Life history and Habits: The Larger Elm Leaf Beetle has one generation per year. The female beetle lays its eggs in groups on the underside of leaves, and the larvae emerge and feed on the leaves. When fully grown, the larvae drop to the ground and pupate in the soil. The adult beetles emerge and feed on the leaves before overwintering in sheltered areas.