Search Results

You are looking at 51 - 60 of 191 items for :

  • "Vaccinium macrocarpon" x
  • Refine by Access: All x
Clear All
Open access

Brian A. Birrenkott and Elden J. Stang

Abstract

Pollination and pollen tube growth were evaluated in two years as potential factors suppressing cranberry (Vaccinium macrocarpon Ait.) fruit set. Supplementing insect pollination with hand pollination increased fruit set from ≈30% to ≈38% in both years. The number of flowers per unit area was an important contributor to fruit set variation in one year. Cranberry uprights exhibited a temporal decline in fruit set when flowers were pollinated sequentially; the first flowers to open had a higher probability of fruit development than flowers opening later. Examination of stigmas indicated flowers receiving low amounts of pollen (<10 tetrads), or pollen that fails to germinate, are more likely to abort. An inadequate number of pollen tubes and lack of subsequent fertilization provides a partial explanation of fruit abortion in cranberry. Cranberry fruit set under existing field conditions appears to be limited, in part by insufficient pollination and pollen tube growth, with the latter apparently the result of intraplant competition for resources. Providing supplemental hand pollination increased cranberry yields in both years, 48% over natural insect pollination when the number of flowering uprights per unit area was high (≈3000/m2). A significant amount of yield variation was explained by the number of flowering uprights per unit area in both years.

Free access

Justine E. Vanden Heuvel and Wesley R. Autio

In recent years, cranberries ( Vaccinium macrocarpon Ait.) have been recognized as a major source of phenolic compounds in the human diet. Research is accruing that demonstrates the positive health benefits of cranberries ( Neto et al., 2005

Open access

Nai-chia Luke, Chee-kok Chin, and Paul Eck

Abstract

An effective dialysis extraction method was developed to extract gibberellinlike substances from cranberry plant tissue.

Open access

A. W. Stretch and M. J. Ceponis

Abstract

Six cranberry (Vaccinium macrocarpon Ait.) cultivars, (water harvested under New Jersey growing conditions) were evaluated for their suitability for fresh market sale. Fruit were hand-picked and water-reel picked, held in the bog flood water for 0-, 4-, 8-, 12-, and 24-hr periods, and then stored for 12 weeks at 3°C. After an additional 4 days at 21° storage the fruit were evaluated for fungal fruit rot and physiological breakdown (PB). ‘Franklin’, ‘Pilgrim’, and ‘Stevens’ were superior to ‘Early Black’ and ‘Wilcox’ as measured by occurrence of rot and PB. Water immersion time had a greater influence on PB than on rot. As time in the water increased, the percentage of fruit manifesting PB increased, with ‘Ben Lear’ developing the least and ‘Early Black’ and ‘Wilcox’ the most PB.

Free access

Vincent Pelletier, Steeve Pepin, Thomas Laurent, Jacques Gallichand, and Jean Caron

The cultivated cranberry ( Vaccinium macrocarpon Ait.) is a perennial plant native from North America ( Eck, 1990 ). Its productivity is maximized when soil water potential in the root zone (at ≈10-cm depth) is maintained between −3.0 and −7.5 kPa

Open access

Azmi Y. Shawa

Abstract

(2-Chloroethyl)phosphonic acid (ethephon) applied in 1975, and 1977, two weeks before harvest at the rate of 1.1 kg a.i./ha increased anthocyanin content. Treatments applied in 1976 did not affect color. All applications of ethephon increased CO2 production and percentage breakdown of ‘McFarlin’ cranberry fruit but pullforce, berry size, weight, acidity, and soluble solids were unaffected.

Free access

Kevin R. Kosola and Beth Ann A. Workmaster

. Res. 95 1160 1162 10.1016/S0953-7562(09)80005-1 Hashem, A.R. 1995 The role of mycorrhizal infection in the resistance of Vaccinium macrocarpon to manganese Mycorrhiza 5 289 291 10.1007/BF00204964

Free access

Doina Clapa, Alexandru Fira, and Nirmal Joshee

’ ( Prunus cerasus × Prunus canescens ) is a dwarf cherry rootstock. Rubus idaeus , Rubus fruticosus , Vaccinium macrocarpon , and Vaccinium corymbosum as well as ‘Tayberry’ ( Rubus fruticosus × Rubus idaeus ) are important fruit shrubs. Lycium

Open access

Bruce Rigby and M. N. Dana

Abstract

Highly significant correlations were found between seed no. and berry vol in 5 cultivars of cranberry, Vaccinium macrocarpon Ait. A formula is given for the calculation of vol from longitudinal and transverse berry diam.

Open access

L. V. Hall and R. J. Newbery

Abstract

Development of flower primordia in a native selection was similar to that reported for the cultivated cranberry (Vaccinium macrocarpon Ait.) in Wisconsin and Massachusetts. Plants injured by frost had fewer later developing primordia than the normal. The flower primordia in Stevens’ developed earlier and were more vigorous than those in the native selection.