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- Author or Editor: M. E. Watson x
- HortScience x
Abstract
Taxus media Rehd. ‘Anderson’ were grown at 4 boron rates: 0.5, 5.0, 25.0 and 50.0 ppm using 2 media:4 pinebark:l sand and 4 hardwood bark:l sand. toxicity symptoms developed when foliar concentration was between 85–100 μg/g of dry tissue. Foliar symptoms of toxicity were characterized by leaf-tip yellowing followed by leaf-tip necrosis and premature defoliation. Shoot and root growth were suppressed at the 50 ppm application rate. continued to accumulate in the foliage after the 2 higher rates of were discontinued. Foliar concentration of Ca, Mn, Fe and Zn were lower when plants were grown with 25 and 50 ppm when compared to plants grown with 0.5 and 5 ppm B.
Abstract
Harvesting mature-green tomatoesis common practice where they are grown commercially for the fresh market. Usually, the tomato fields are picked 4 to 6 times in a season, as the most mature fruits on the vine reach the mature-green stage. If mechanical harvesting becomes a reality for fresh market tomatoes, a once-over harvest will probably be used instead of the usual multiple pick. Yields will then be limited by the number of fruits mature enough at a given time to ripen off-vine and meet market standards for color. It will be imperative to grow a variety that has a concentrated set and whose fruits have good ripening ability when harvested prematurely.
Abstract
Container grown Acer rubrum L. ‘Red Sunset’ were fertilized weekly with 50, 150 and 300 ppm N. A second growth flush occurred on trees fertilized at 150 and 300 ppm N. Trees fertilized with 300 ppm N contained higher N concentrations in both mature and immature leaves as compared to trees fertilized with 50 ppm N.
The objective of this study was to relate the lethal freezing temperatures of St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] genotypes, as measured by differential thermal analysis (DTA), to winter survival observed in the field. DTA-predicted lethal temperatures of 14 St. Augustinegrass genotypes ranged from –7.7 to –4.7C. Regression of field winter survival vs. DTA-predicted lethal temperatures resulted in an r 2 = 0.57 for one field trial that evaluated cultivars with a relatively narrow range of expected freezing tolerance. In a second study evaluating cultivars with a greater range of freezing tolerance, r 2 was 0.92 when winter survival was regressed on DTA-predicted lethal temperatures. DTA was successful in measuring freezing avoidance of St. Augustinegrass cultivars.
Abstract
‘Melody’ is a late midseason, white wine grape (Fig. 1) which produces a vinifera-type wine with varietal character. In addition, ‘Melody’ does not require cluster thinning and is moderately resistant to powdery mildew [Uncinula necator (Schw.) Burr.]. It is the 3rd wine grape cultivar to be named by the Dept. of Horticultural Sciences, Geneva, N.Y., and follows the release of ‘Cayuga White’ (1) and ‘Horizon’ (2). It is the first in a series of wine grape releases from this station to be given a name with a musical theme.