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 ...

Question: My white pine tree is turning brown on the tip. Do you have any idea of what may be going on or what I can spray? Answer: A smaller than normal size of a leader branch, followed by wilting, ...

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Trees, especially pine trees, are in for challenging times. Although pine trees are relatively drought tolerant, ongoing drought, as we’ve experienced in Marin County for several years, has caused ...

Q. I’ve noticed a white cotton-like substance on the tips of some of my pine branches, reminding me somewhat of one of those fake snow covered Christmas trees. What is this and should I be concerned? ...