Author Archives: Sacramento Valley Orchards

Walnut Blight Bud Sampling

Depending upon weather conditions, pathogen population and walnut variety, walnut blight caused by the bacterium Xanthomonas arboricola pv. juglandis (Xaj) can cause significant crop loss. Blight damage in later leafing varieties largely depends on how high the overwintering population of inoculum built up on bud scales. Initial inoculum in dormant buds can be used to predict subsequent disease severity. Continue reading

Advances in Walnut Production Short Course – Registration Opens September 4th

Plan to join us for this integrated orchard management short course featuring UC faculty, Cooperative Extension specialists and farm advisors, and USDA researchers who will provide an in-depth, comprehensive study of all phases of walnut culture and production. Registration for California residents opens September 4th. Continue reading

It’s That Season Again: Growers Are Being Asked to Buy Products

Growers are faced with an ever-changing list of commercial “tools”, each with the promise of providing some advantage to the farmer. With the large number of new products available, and the number of salespeople promoting them, it is often difficult for growers to distinguish between products likely to provide real benefit, and those that may actually reduce the profitability of the farm. When approached with a new product or technology it is obligatory to challenge claims with the following questions: Continue reading

Observations from the Prune Rootstock Trial

As soil treatment options become increasingly limited, more restrictive and less effective, the priority to identify a genetic solution to solve or reduce the replant issue is of increasing interest. One genetic solution is to find or develop rootstocks to help manage soil related problems. Also of interest are root and tree characteristics imparting canopy size control, good anchorage and little or no root suckering. In 2011, University of California Farm Advisors and campus based faculty designed and planted 3 large rootstock experiments to evaluate 29 prune rootstocks. Continue reading