The Plum Curculio is a common insect that attacks fruit trees. It is highly destructive to peaches and plums where it can cause extreme damage to fruit. The larvae tunnels in the developing fruit making the fruit inedible. Also, adults eat holes in fruit for depositing eggs. These holes provide entry for the brown rot fungus and produce markings on peaches that do to the marks appearance are called cat-markings.

The hosts of the plum curculio are apple, nectarine, plum, cherry, peach, apricot, pear and quince. This insect can also survive on some wild hosts including wild plum, hawthorn and crabapple.