Asked 2020-10-17 20:51:15
Clay County Missouri
It may be an elm sawfly larva, (Cimbex americana). Management of elm sawflies in MN is rarely needed.Â The following site has more information about sawflies.https://extension.umn.edu/yard-and-garden-insects/sawflies#elm-sawfly-1041964
On Sat, Oct 17, 2020 at 4:09 PM, Ask Extensionwrote:
Cankerworm is the common name for several destructive caterpillars in the measuring worm family. Fall cankerworm is a looper caterpillar that can range from light green to dark green to black.Â Fall cankerworms are about an inch long when full grown. Mature larvae descend from trees on silk threads to pupate in the soil. They emerge as adults during periods of freezing temperatures to mate and lay eggs on host plants. There is one generation each year.