Monarthrum (genus)

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Monarthrum mali (click on image to enlarge it)
Author(s): Natasha Wright, Florida Department of Agriculture and Consumer Services
Source: IPM Images

Monarthrum Kirsch, 1866

This genus of ambrosia beetles is found in the Americas, mainly in tropical areas. It includes more than 100 species. The adults are elongated and typically 2-4 mm long, light to dark brown. In many species, the colouration has two shades of brown.

Most species cause little or no damage to trees. However, a few are regarded as pests of forest and fruit trees. For example, Monarthrum mali infests apple, other fruit trees and forest trees like beech or oak. Moreover, it has spread from North America to Italy.

Currently, the following species have been entered into the system: