The emerald ash borer's larvae attack trees from within. Beech leaf disease from nematodes attack beech trees; Various fungal ...

This tree is infected with the fungal pathogen that causes Pine Ghost Canker, which can be fatal for trees. (Akif Eskalen, UC Davis) Fungal pathogens that cause die-back in grape, avocado, citrus, nut ...

Georgia forestry officials released a new beetle report showing where destructive pine pest activity is highest this year.

Climate change is hampering mountain pine beetle reproduction but also appears to slightly benefit the invasive insect in other ways, new University of Alberta research shows. On an apparent upside ...

The mountain pine beetle is one of the main causes of tree mortality in the pine forests of North America. For example, the insect has killed thousands of acres of pine forest in British Columbia and ...

Add Yahoo as a preferred source to see more of our stories on Google. Close-up of pine needles on ground - Grigory Stoyakin/Shutterstock If you have pine trees in your yard, you know just how many ...

This list of stories illustrates the spread of insects like northern giant hornets, the presence of pine sawflies on local trees, and outbreaks of the California fivespined ips beetle in places like ...

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The warmest winter in Colorado history could lead to record-breaking proliferation of a tiny insect, about the size of a grain of rice, that has killed millions of acres of trees across the Centennial ...

Take a walk in the woods in Summit County and study the bark in the pines. Chances are high that you’ll spot some divots and channels carved out by none other than the infamous pine beetle. We know ...