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2020 Summer Newsletter

  Research Program Update - Oak Tree Mortality 

Last year multiple landowners in the Sierra Nevada foothills of Butte, Placer and Nevada counties reached out to local UC Cooperative Extension advisors regarding oak mortality concerns.  Working with Ph.D. Garbelotto and Doug Schmidt in the UC Berkeley Forest Pathology and Mycology Lab ( samples were collected including leaves with evidence of scorching, soil samples from the base of symptomatic trees and wood samples from the trunks that underwent a series of laboratory test. 

All tests were negative, except for direct culturing of wood chips at breast height resulting in the growth of Botryosphaeria (synonym Diplodia) spp., specifically Botryosphaeria corticola and B. dothidea. These two species are native to California, and have been known to cause a lethal canker disease in some California oak species. Susceptibility to Diplodia is known to be genetically regulated in oak species, meaning that some families are more susceptible than others. Susceptibility can be greatly enhanced by predisposing factors, such as drought and infection by other primary pathogens, often root infection by Phytophthora species. Click here to read more. 

If you have noticed oak mortality on your property and would be interested in collaborating on future research or  would like additional information please contact Plumas, Sierra and Butte Livestock and Natural Resources Advisor Tracy Schohr at or 916-716-2643.

 LAST CHANCE - Bull Management Survey 

UC Cooperative Extension partnered with Cal Poly and Chico State to launch a survey of California ranchers titled “Factors influencing bull selection decisions and management in extensive rangeland production systems of the western United States”.  There have been over 200 responses and we would appreciate your perspective too! The survey looks at the core fundamentals of beef production, sire selection and management. We really value ranchers taking 20 minutes to complete the anonymous survey. 

California Cattlemen Association members should have received a copy in the mail or you can complete it online at

Results will be shared in a future newsletter and influence local UC workshops. 
For more information or questions on the survey please contact Plumas, Sierra and Butte Livestock and Natural Resources Advisor Tracy Schohr at or 916-716-2643

  UCCE Home Hardening & Wildfire Preparedness Webinar

Join UC Cooperative Extension and Dr. Steve Quarles UC Cooperative Extension Advisor Emeritus and retired senior scientist with Insurance Institute for Business and Safety for a two hour webinar on home hardening, defensible space, and emergency preparedness on June 30th from 4:00pm - 6:00pm. This FREE program is designed to provide practical tips for home fire-protection with an opportunity to ask questions from our expert presenter. 

To register visit: 

Plumas County Grazing Lease

The California Department of Fish and Wildlife (CDFW) offers a Request for Proposal (RFP) to issue a Permit for Excess Vegetation Disposal (Grazing). The proposed grazing activity will be conducted on Crocker Meadows Wildlife Area - ~1700 acres, 45 AU per month for 3.5 months (June 15th – Oct 1st). This year start date upon execution of permit. 

Mandatory site visit: 10:30 am Monday, June 15, 2020 on Beckwourth Genesee Rd. See link below for map (meeting will be on the little spur road on East side).

Please refer to the attached documentation for additional details. CDFW notes most grazing permits are held up because of insurance delays, please confirm these details with your insurance agent when completing RFP. 

RFP is available at 

Copyright © 2020 UCCE Plumas Sierra, All rights reserved.

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