Published January 2007. Reviewed July 2016. Please check for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Tree vigor is important because more leaves mean more carbohydrate production and larger cherries. The production of high-quality cherries requires a gross canopy leaf area-to-fruit ratio of at least 200 cm2 of leaf area per fruit, which roughly translates to five leaves per fruit. Trees with a lower LA:F ratio...
This publication gives an overview of processing cherry production in Oregon and describes cherry cultivars used for brining, freezing, and canning. It also provides information on diverting fresh-market cherries to the processing industry and developing strategies for profitability.
While the objectives of pruning and tree training have changed little over the years, the need for attention to pruning and training has increased dramatically. Pacific Northwest cherry growers now compete in a world market, making fruit size and quality increasingly important. In addition, labor is less available and more...
The distribution of anthocyanin pigments and polyphenolics of sweet (Prunus avium) and sour cherries (Prunus cerasus) were determined by Ultraviolet- Visible (UV-Visible) spectrophotometry and High Performance Liquid Chromatography with photodiode array detector (HPLC-DAD). Their antioxidant properties were determined by Oxygen Radical Absorbance Capacity (ORAC) and Ferric Reducing Antioxidant Power (FRAP)....
In recent years, the number of fresh-market sweet cherry cultivars (varieties) produced in the Pacific Northwest (PNW) has grown from a few, dominated by one (Bing), to a dozen or more. Lapins was among the first new cultivars to gain significance in the mid-1990s, followed by Sweetheart, Chelan, Tieton, and...
Sweet cherry scion cultivars have been selected over millennia for many reasons, but over the past century, breeding programs have concentrated mainly on achieving improved characteristics such as yield, taste, fruit size, fruit firmness, fruit color, precocity, and resistance to fruit cracking and disease. In contrast, rootstock cultivars have only...
The bacterium Pseudomonas syringae affects different crops worldwide. In the
Willamette Valley of Oregon, P. syringae causes bacterial canker in sweet cherry,
severely limiting its production. High grafting of susceptible sweet cherry cultivars to
resistant rootstocks is practiced in the Willamette Valley to reduce incidence of this
disease. The research...
Shoot regeneration in vitro is a difficult problem for cherry species. This study addressed three approaches to the problem, regeneration of adventitious shoots from roots and leaves of mature cherry clones, and from cotyledons of open-pollinated 'Royal Ann' cotyledons. Regeneration on roots occurred at a very low frequency. Adventitious shoots...