Several beetles infest the foliage of potatoes.
The CPB is different and more damaging because both adults and especially the larvae, or grubs, feed on the foliage. It was first described from the upper Missouri River Valley in 1824. As settlers began to plant more and more potatoes, the beetle found a new host, spreading 75 to 80 miles per year and arriving in New England in the 1870s. It had spread to Europe by World War I and is presently spreading through Russia and Asia. The CPB favors potato.