Santa Clarita Valley oak trees are being invaded by the goldspotted oak borer; an insect named for its iridescent black shell ...

The tree disease that exploded in Bay Area forests three decades ago, stunning residents with vast die-offs in parks and neighborhoods before slowing, has opened a new front with a second, potentially ...

What is wrong with my live oak? I hope it’s not a disease, since I have five others in my yard, and I don’t want it to spread ...

The North Valley Complex in Wilsonville is home to the state’s entomology labs, where insects are identified and studied.

Some lawn maintenance is recommended now that the leaves have fallen.Experts explained why this is the best time of year to ...

Brooke Harlander (left) poses with her team and city officials as the group ceremoniously plants a live oak tree at the ...

A second look is exactly what some scientists did. Those researchers snipped leaf samples from multiple trees in that ...

When choosing a large shade tree, one must always deal with a conundrum – there is an inverse relationship between the ...

Burls, the mysterious bulbous growths on trees, are valuable to artisans and can fetch thousands of dollars, but should only be purchased from legitimate salvage operations to avoid poaching from ...

A deadly new oak-tree disease can be prevented by pruning them in the dormant season (if needed) instead of spring or summer.

Royer Vineyard is best known for: growing some of the best white wine grapes in Oregon, with an emphasis on chardonnay. The ...

From now through the end of December is the time of year to inspect your trees for Sudden Oak Death. The mold pathogen that causes Sudden Oak Death, phytophthora ramorum, is most active during wet ...