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  • Arizona Forest Health Alert: Mediterranean Pine Engraver Found in Urban Pines

Arizona Forest Health Alert: Mediterranean Pine Engraver Found in Urban Pines

Mediterranean Pine Engraver Beetle

The Arizona Department of Forestry and Fire Management's Urban and Community Forestry Division continues to monitor a non-native bark beetle in Arizona. The Mediterranean Pine Engraver Beetle or MPE - (Orthotomicus erosus) was discovered in the Phoenix-metro area in 2018. MPE are native to Europe, the Middle East, northern Africa, and China. They likely arrived in the United States by riding in solid wood packing materials. MPE are tiny, about 3-3.5mm long and reddish-brown in color. To date, MPE have only been found on eldarica pines in the Phoenix-metro area. 

 

MPE beetles generally attack distressed trees by boring holes in the bark and chewing on the layer just under the bark, called the cambium layer, where a tree transports sugars and water. Tunnels created by the beetles block the tree's ability to transport water and nutrients, in turn killing the tree. 

 

Common signs of urban tree MPE infestation are yellowing needles, especially at the top of the tree and the presence of red boring dust on the bark. Less common signs in an urban setting, include pin-sized holes in the bark and resin oozing out of the holes in the bark. 

 

For more information on the MPE - please see UCF's Arizona Forest Health Alert - Mediterranean Pine Engraver Found in Urban Pines. 

Related Terms: 
Mediterranean Pine Engraver
Non Native Bark Beetle
Bark Beetle
Urban Pines
Phoenix
Phoenix-Metro
Section: 
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