Some are pests of potatoes, tomatoes and related plants. These include the potato beetle. Adults not harmful. Larvae damage trees and shrubs by boring through wood and can be highly destructive. Adults often found on goldenrod.
Adults cause no harm.
Some are free-living leaf eaters, some are leaf miners, some eat roots and some bore in stems. Can be a major pest of herbaceous ornamentals and vegetables. Feeding of adults results in a shot-hole appearance. Snout Beetles Distinctive in that adults develop a long snout . Many are plant pests having larvae that burrow into fruit, seed and twigs.