UC Master Gardeners of Butte County
University of California
UC Master Gardeners of Butte County


Got Gardening Questions?

Visit or call the Hotline
Wednesday 9am-12pm
Thursday 1-4pm

Call: 530-538-7201

Or drop by: The Butte County Cooperative Extension Office
2279-B Del Oro Avenue
Oroville, CA 95965

You can also catch us in person at local farmers markets or at one of our information booths. Check out where we'll be on the Events page.

Help Us Help You

You never can tell what's at the root of the problem. Below are some questions we may ask when you call:

  • Name of plant
  • Age of plant
  • Soil type (loam, sandy, clay)
  • Current watering methods (drip, sprinkler, hand)
  • Frequency of watering
  • Sun exposure
  • Evidence of insects or other damage – check on both sides of leaves
  • Recent changes that may effect the plant (watering, fertilizing)

Samples and photos related to your question are strongly encouraged. Drop them by the office any time, or email them to:
In the subject put: Attention Master Gardeners

Include a description of the problem.

What’s Hot Now?

Is there a fungicide that will control oak root fungus?
by Brent McGhie

mulching mower
The short answer to this question is “no.”  Oak root rot is caused by the fungus, Armillaria.  The best approaches to controlling this deadly plant disease are 1) avoiding over-watering, and 2) planting species that are resistant to it (these include madrone, tree anemone, western redbud, some maples, and many species of pine).

For more information

"Oak Root Fungus." Butte County Gardening Guide and Three-Year Gardening Journal. Chico, CA, 2016. 56. Print.

The Real Dirt: Oak Root Fungus—Armillaria Mellea, The Real Dirt

Armillaria root rot (Oak root fungus), UC Integrated Pest Management

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