Hop vine borer

The hop-vine borer (HVB), Hydraecia immanis Guenee, is a stemfeeding caterpillar (Lepidoptera Noctuidae) which has only very recently "been causing severe localized damage to corn in large portions (more than 50 different counties) of Wisconsin,... 

Minnesota, Iowa, and Illinois (9). As indicated by its common name, the hop-vine borer had been found in close association with hop (Humulus lupulus) plants. Wild hops, found from the east coast of the U.S. to the Rocky Mountains, presumably served as the primary host for the Insect in North America (10) for the last 100-150 years or longer. 

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