If there is an ancient Valley Oak in NorCal that you love; get ready to be heartbroken. If it's on your property and it looks healthy now, give it a deep water at the drip line, because soon it will need every resource that tree can muster to fend off #MOB, aka Mediterranean Oak Borer 1/x
2/x #MOB was first detected in Calistoga in Napa County in 2019, likely imported from the Mediterranean area in packing materials or pallets. It now has spread extensively in the North Bay region, reaching beyond Lake and into Mendocino Counties, as well as to the West around Sacramento.
https://ucanr.edu/site/mediterranean-oak-borer/distribution-california
Distribution in California | UC Agriculture and Natural Resources

MOB has been found in Amador, El Dorado, Lake, Napa, Marin, Mendocino, Napa, Sacramento, Sonoma and Yolo Counties. .

UC Agriculture and Natural Resources

3/x At a Forest Health-related meeting this afternoon, I asked the regional entomologist how bad it was now, as I was seeing it in more and more areas of #LakeCountyCA. "It's very dark news," he responded. "There is no funding for research, mitigation, or disposal."

He anticipates that within a few years, all of the ancient Valley Oaks will be gone. Then #MOB will move to younger trees, then Blue Oaks.

@terreal

Hmm, thinking about it: I have probably half a dozen very young oak (max 3ft) on my property, and regularly pull up sprouted acorns (barely a few leaves — they're actually a nuisance). Is there any way to keep them protected to perhaps help with reintroduction later?

@terreal

Thank you for the heads-up — there are a lot of oak around here

Photo during some lovely light yesterday afternoon

#Sonoma
#Photography
#LandscapePhotography