Search Results

You are looking at 31 - 35 of 35 items for

  • Author or Editor: D.C. Ferree x
Clear All Modify Search

Flower and spur characteristics of eight apple cultivars were determined at bloom and following cell division and related to fruit growth over the season. Flower number per spur was higher in `Jonagold', `Fiesta', `Southern Snap', `Royal Gala', than in `Red Chief Delicious', `Pacific Rose' and `Fuji', and the latter three cultivars also had the lowest total flower dry weight per spur. Generally, pedicel length of the king flower was shorter than the lateral, with `Fuji' having the longest king flower pedicel and `Red Chief' and `Pacific Rose' the shortest. At full bloom, `Jonagold' and `Fiesta' had the most leaves/spur, followed by `Fuji', `Southern Snap', `Royal Gala', `Pacific Rose', with `Red Chief' having fewer leaves/spur than all other cultivars. Leaf area/spur was highest in `Jonagold', `Fiesta', `Royal Gala', and `Fuji', followed by `Southern Snap', with `Red Chief' and `Pacific Rose' having lower leaf areas and fruit set than all other cultivars. At the end of cell division, `Fuji' and `Jonagold' had the highest leaf area per spur and `Fuji' and `Royal Gala' the highest bourse leaf area. `Braeburn' and `Red Chief' had lower bourse leaf areas than all other cultivars. `Royal Gala', `Southern Snap', and `Fuji' had the longest bourse shoots and `Red Chief' the shortest.

Free access

This study was conducted at three locations (Manhattan, Kan.; Wichita, Kan.; Wooster, Ohio) for 3 years (1994–1996). At bloom, 2-year-old limb sections from `Smoothee', `Jonagold', `Empire', and `Rome' on M.9EMLA, Bud 9, Mark, Ottawa 3, or M.26EMLA were evaluated for flowering and vegetative, spurs (5 cm or less), short shoots (5–15 cm) and long shoots (>15 cm). In mid-August, spur quality was estimated by randomly selecting five spurs per cultivar rootstock combination. There were significant location and year differences for all the morphological and spur quality characters measured. Across locations and years, the following characteristics were consistently high for the cultivars listed: stem density of flowering spurs for `Empire'; and leaf area, bud-diameter and average leaf size per spur for `Jonagold'. The most consistently high characteristics across locations and years for the rootstocks were for stem density of flowering spurs for Mark and leaf number, leaf area, bud-diameter, and average leaf size per spur for M.26EMLA. Stem density for flowering short shoots was highest for `Smoothee' and M.9EMLA in Wooster, `Jonagold' and Bud 9 in Wichita and `Rome', `Jonagold', and Bud 9 in Manhattan. Flowering long shoot stem density was highest for `Smoothee', `Jonagold', and M.26EMLA in Wooster, `Smoothee' in Wichita, and `Jonagold' and Ottawa 3 in Manhattan. There were some significant cultivar by rootstock interactions. The most-consistent interactions across locations and years were for stem cross-sectional area, stem length, stem density of flowering spurs, and flowering short shoots and bud-diameter per spur.

Free access

Abstract

The microclimate surrounding ‘Rome Beauty’ apples (Malus × domestica Borkh.) was modified by enclosing clusters at petal fall (PF) in various types of bags, and the influence of these treatments on development of scarf skin, cuticular waxes, and peel nutrient status was determined. The cuticle and epidermis of fruit with scarf skin generally was unbroken, but cell separations several cell layers below the surface resulted in gaps or air spaces which caused the visual whitish-gray appearance (scarf skin). Energy dispersive x-ray analysis and tissue analysis of apple peel indicated an increase in concentration of Al, Ca, and Mn with severe scarf skin. All bag types reduced scarf skin compared with the unbagged control, with cheesecloth giving the smallest reduction (34% on green side) and the large polyethylene bag the largest reduction (75% reduction green side). The total amount or components of cuticular wax was not influenced by the bagging treatments or by the different levels of scarf skin. Light level, temperature, and absolute and relative humidity were modified by the various types of bags, but the role of the individual environmental parameters on the expression of scarf skin was not indicated.

Open Access

Eight unique varietal grape juices were examined for their antioxidant characteristics and commercial potential compared to that of commercial `Niagara' and `Concord'. Grape juices were cold-pressed from mature grapes, clarified, preserved, analyzed for pH, soluble solid and titratable acidity levels, pasteurized at 73 °C for 12 seconds, and sampled for microbial testing. A preliminary panel of 41 routine evaluators assessed all juices for 18 quality characteristics against known and blind controls. Based on these results, `Reliance', `Traminette', and New York 73 juices were presented to a 107-member panel of untrained judges. Panelists rated experimental juices against commercial controls for color, appearance, aroma and flavor intensity, sweetness, tartness, overall quality, and preference. Among juices tested, `Reliance' and NY 73 offer the greatest potential as specialty grape juices. `Traminette', `Chardonel', `Chambourcin', and NY 62 may also have potential as grape juice cultivars, if processed to improve their color and clarity. Small juice lots were hand-pressed from mature grapes and examined for total anthocyanin and phenolic content, antioxidant characteristics (DPPH and FRAP) and levels of individual phenolic compounds via GC-MS. Total anthocyanin and phenolic contents of experimental juices varied from 0–1460 μg·gfw-1 and 1001–2850 μg·gfw-1, respectively, and were highest in NY 73. Estimates of antioxidant activity differed slightly among tests, but activity appeared highest in `Chambourcin' and NY 73 and lowest in `Reliance'. Levels of individual compounds varied substantially among juices.

Free access

Abstract

Chemicals deposited on foliage varied by a factor of three to five times when sprays were applied with an airblast sprayer to apple (Malus domestica Borkh.) trees in various training systems. Deposits were higher with vertical than horizontal training systems, smaller tree sizes, and less-dense tree canopies of spur-type trees. The Lincoln canopy tree training system prevented good spray penetration because the airblast spray pattern was split by the horizontal nature of the canopy.

Open Access