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Hilary A. Sandler

Cranberries are low-growing, trailing, woody vines that, once planted into a commercial setting, could stay in production for more than 25 years. During the productive life of the planting, the vine canopy can become degraded (e.g., too thick to

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Jenny L. Bolivar-Medina, Camilo Villouta, Beth Ann Workmaster, and Amaya Atucha

Crop forecasting is a highly desirable tool for fruit production. For cranberry, early and accurate yield prediction would benefit handlers and processors to plan for crop volumes and fruit prices; most importantly, it would allow growers to

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Olanike O. Onayemi, Catherine C. Neto, and Justine E. Vanden Heuvel

This research was supported by the University of Massachusetts Dartmouth Cranberry Research Fund, and was submitted by O.O. Onayemi in partial fulfillment of the requirements for the MS degree in the Department of Chemistry and Biochemistry

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Betsey Miller, Denny J. Bruck, and Vaughn Walton

American cranberry Vaccinium macrocarpon Ait. is one of North America’s most important indigenous commercially produced crops ( Pollack and Perez, 2001 ). The U.S. cranberry industry is valued at ≈$444 million annually with 15,459 ha in production

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Eric L. Zeldin, Brent H. McCown, Elden Stang, and John Klueh

A project to determine the comparative growth response of micropropagated (MP) and field propagated (FP) cranberry plants was conducted in field plots at a commercial cranberry marsh. Microcuttings were derived from shoot culture and rooted in either plugs or peat pots filled with peat. Replicated 1 m2 plots of MP plants and 15 cm FP cuttings were planted in June. Survival of MP plants after one month was significantly greater than that of the FP plants. Significant growth differences were observed later in the season. The MP plants produced more branches and greater runner elongation, resulting in a much greater ground cover. Many of the FP plants flowered and produced fruit, while the MP plants produced neither. Far fewer new flower buds were set in the fall on the MP plants. Potential advantages of MP cranberries include the fast, uniform establishment of new marshes and consequently earlier achievement of full productivity, and the rapid introduction of new genotypes from breeding or genetic engineering.

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Brett Suhayda, Carolyn J. DeMoranville, Hilary A. Sandler, Wesley R. Autio, and Justine E. Vanden Heuvel

Cranberry is a low-growing vine, with a perennial growth habit ( Eck, 1990 ). Native to North America, cranberry reproduces vegetatively by horizontal shoots (stolons), known in the cranberry industry as runners, or by shorter vertical shoots, known

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Hilary A. Sandler and Carolyn J. DeMoranville

Cranberry beds typically are planted by using unrooted vines that are pressed directly into the soil using a disc with multiple rotating heads. Once planted, beds are maintained in production for at least 20 years. The development of new cultivars

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Beth Ann A. Workmaster, Jiwan P. Palta, and Michael Wisniewski

, University of Wisconsin (UW), Madison, and by the Wisconsin State Cranberry Growers Association. We thank the staff of the UW, Madison Biotron and Heidi Barnhill of the Russell Laboratories Scanning Electron Microscopy Facility for their technical assistance

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Teryl R. Roper and Marianna Hagidimitriou

Carbohydrate concentration may be important for flower initiation and fruit set in cranberry (Vaccinium macrocarpon Ait.). Fruit set has been shown to be a major limiting factor in yield component analysis. The objective of this research was to identify carbohydrate concentrations in cranberry tissues at various stages of development under field conditions. Samples of two cranberry cultivars, `Stevens' and `Searles' were collected during the 1989 season using a 13 cm diameter probe. Samples were divided into fruit, uprights, woody stems and roots. Carbohydrates were quantified by HPLC. Nonstructural carbohydrates were primarily sucrose, glucose, fructose and starch. Soluble carbohydrate concentration was stable throughout the season in tissues analyzed, while starch content was high early in the season then decreased during blossom and fruit set. This work shows that starch reserves in leaves and stems apparently are remobilized to support fruit set in cranberry.

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Carolyn DeMoranville, Anne Averill, and Joan Davenport

The two major determinants in sustainable cranberry production are productivity and preservation of water quality. Productivity and water quality were studied using composted chicken manure (CM) and fish hydrolysate fertilizer (FH). In whole bog field trials, soluble granular fertilizer (SG) was replaced with organic fertilizer. At all locations receiving FH, cranberry yields were maintained or improved. The yield results from bogs receiving the CM were mixed, partially due to the quality of the experimental sites. Based on water samples taken from bogs receiving FH, there was no P output and less NH output than from bogs receiving SG. Leaching properties of CM, FH, and SG in cranberry soils were investigated in the laboratory. Concentrations of N03 -, P04 -, and K+ were greatest in the leachate from columns receiving SG, indicating that organic fertilizers are less likely to lead to the leaching of nutrients into cranberry bog water.