On a recent drive along the western slope of California’s Sierra Nevada mountains, we were struck by the large brown blemishes soiling the mountainsides. As we headed south during that October trip, ...

FRESNO, Calif. – The number of trees in California’s Sierra Nevada forests killed by drought, a bark beetle epidemic and warmer temperatures has dramatically increased since last year, raising fears ...

SEQUOIA NATIONAL PARK, California — High in the evergreen canopy of General Sherman, the world’s largest tree, researchers searched for evidence of an emerging threat to giant sequoias: bark beetles.

SEQUOIA NATIONAL FOREST, Calif. (KFSN) -- Communities continue to struggle with dwindling water supplies. Now, the drought is creating perfect conditions for an insect that's threatening trees and ...

MADERA COUNTY (KFSN) -- Crews spent the day planting baby seedlings to help with the tree mortality epidemic caused by bark beetles. It was a beautiful sight to see. Baby pine trees bundled together ...

My friend Roni and I were discussing an upcoming heavy pruning on her pine trees, which are growing into power lines. She said she was planning on using a systemic insecticide containing imidacloprid ...

SIERRA NATIONAL FOREST, Calif. (KSEE/KGPE) – A historic area in the Sierra National Forest will be temporarily closed for public safety due to post-fire hazards and other restoration operations in the ...

LARAMIE -- A "perfect storm" of warmer winters leading to greater larvae survival, extended drought and extensive stands of older, more vulnerable trees has caused the pine bark beetle epidemic in ...