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Abstract
‘Lafayette‘ is a compact, determinate tomato (Lycopersicon esculentum Mill.) intended for mechanical harvest. It was named for the city of Lafayette, Indiana.
Abstract
‘Vermillion’ is a productive, determinate, crimson tomato (Lycopersicon esculentum Mill.) with excellent fruit color. Its name, which gives attention to its outstanding fruit color, honors a county in Indiana.
Abstract
(2-Chloroethyl)phosphonic acid (ethephon) applied at 2.9 kg/ha to plants of tomato (Lycopersicon esculentum MilUwhen 20-30% of the fruit were ripe, did not appreciably affect pH, total acidity, exterior color of the fruit, or consistency of the processed products. Organoleptic analyses of tomato juice indicated no differences in flavor between samples from ethephon-treated and untreated fruit. Chromatographic separation of fruit carotenoids showed that treated fruit synthesized more lycopene than controls.
Abstract
Multiple preharvest applications of CaCl2 at 1000, 2000, or 4000 ppm (actual Ca) had little effect on fruit firmness of blackberry (Rubus sp.) at harvest. After a 24 hour holding, fruit from the first harvest was firmer if treated with Ca. Preharvest Ca treatments reduced soluble solids accumulation in fruit and 4000 ppm caused foliar damage. Ca had little effect on acidity or color at harvest, but reduced the rate of ripening during postharvest holding.
Abstract
Sixty-three cultivars of carnation (Dianthus cary ophyllus L.) including 42 Sim types, 9 non-Sim standards and 12 miniature types, were tested for susceptibility to Fusarium stub dieback caused by Gibberella zeae (Schw.) Petch. All cultivars were assigned a numerical rating by comparing infection rates to ‘Improved White Sim’ (IWS) used as a standard assigned rating of 1.00. Sixteen cultivars had ratings significantly lower than IWS and 3 significantly higher. The range of the ratings was from 0.20 for ‘Maj Britt’ to 2.61 for ‘Orchid Beauty’. The range for Sim types was from 0.25 for ‘Yellow dusty’ to 1.67 for ‘California White’. It is suggested that sufficient variation exists in commercial cultivars for selection for resistance to Fusarium stub dieback.
Abstract
Succinic acid-2,2-dimethylhydrazide (daminozide) applied to ‘Raven’ blackberries at 4000 ppm and to ‘Raven’ and ‘Brazos’ at 2000 ppm between full bloom and first color development and at 2000 ppm in a multiple application applied at full bloom, 2 weeks, and 3 weeks after full bloom resulted in reduced berry size and yield with no beneficial effects on fruit quality. (2-Chloroethyl) phosphonic acid (ethephon) applied to the same cultivare at 1000 ppm 4 days prior to the first harvest increased the amount of fruit mechanically harvested on the first harvest. Ethephon treatment improved color but resulted in mechanically harvested fruit having lower soluble solids and acidity.
Symptoms of chlorotic leaf distortion (CLD) develop on vigorously growing sweetpotato (Ipomoea batatas) plants during sunny weather. They include chlorosis and twisting of young, expanding leaves and the appearance of white material on the adaxial leaf surfaces. The white material consisted of extramatrical fungal mycelia and Fusarium macroconidia. Fusarium lateritium Nees was isolated from surface-sterilized vine segments, leaf primordia, apical meristems, flower parts and true seeds of plants with CLD. Meristem-tip-culture-derived plants (mericlones) did not develop symptoms when grown for extended periods under disease-conducive conditions in the greenhouse. The fungus was not isolated from mericlones or other plants which had remained symptomless in the greenhouse but was isolated from lower nodes of symptomless plants from growers' fields. Symptoms developed on 84% of 185 mericlones of nine sweetpotato genotypes inoculated with F. lateritium isolated from CLD-affected plants. The pathogen was reisolated only from inoculated mericlones.