Can I apply phosphonate to my oak trees to help prevent SOD or do I need a professional?

Yes, you can apply phosphonate to your oak trees to help protect them from sudden oak death. You can find it in many Bay Area garden supply stores. If you apply it topically to the bark, you will also need the surfactant Pentra-Bark® and you will need a sprayer. If you choose to inject it, […]

My coast live oak trunk is oozing. I sprayed the bark in January. Can you estimate how long it will be before the tree fails and we have to remove it?

The symptoms on your oak may be caused by a range of issues. If oozing is accompanied by the presence of fine sawdust, then the tree is dying. Even if it is still green you may want to consider removing it if its failure may cause harm to people or property. The fine sawdust is […]

What are the revised SOD treatment recommendations that were released in June 2015?

The revised SOD treatment recommendations can be found at:  https://nature.berkeley.edu/garbelottowp/?p=1039.

SOD Treatments – Updated Recommendations

 

Are there any treatments available for an oak with Armillaria (oak root fungus)?

Once an oak has the oak root fungus Armillaria (often due to excessive watering),  most treatments will be ineffective. Be sure the base of the tree is free of mulch and other organic debris and slightly expose the root system at the root collar. While fertilizing may not help, try using one bark application of […]

I’m considering removal of bay with ramorum blight, but I have symptomatic and asymptomatic tanoak on my property. Will bay elimination protect my oaks and tanoaks?

Both bay laurels and tanoaks can spread SOD while most oaks are not infectious.  Therefore, bay removal is typically aimed at protecting oaks. In the absence of bays, you may actually be able to facilitate survival of asymptomatic tanoaks, but only if their density is low (about 20 per acre).  A possible plan of action […]

What is the phosphite injection protocol for use against SOD?

There are currently two options for injections: Chemjet® injectors (coil activated) – volume to be injected = 20 ml; 10% of current label dose; pressure 20 PSI (pressure of injector is already set) Arborjet® injectors – volume to be injected = 40 ml; 5% of current label dose; pressure set at 35 PSI Injections should […]

California Agriculture: SOD Treatments

Research Article News Article California Agriculture Vol 63, Jan-Mar 2009 See the Revised Treatment Pages for our latest update

UCB SOD Treatment Training Workshops

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