90 WORKSHOP 5 (Abstr. 170–172) New Chemical and Biological Treatments for Horticultural Seeds
randomized design. Treatments included chemical treatment comprising mainly inorganic salts or fertilizers, plant growth regulators, and physical treatments such bracts removal and trimming slip leaves, different irrigation frequencies, and growing media. The
191 WORKSHOP 23 (Abstr. 1059-1061) Methods and Techniques for Testing Chemicals Used for Thinning Fruit Crops
Maintaining medium pH and nutrient concentrations at levels acceptable for growth are important for producing vigorous transplants in the shortest time. Medium chemical properties, such as cation-exchange capacity, aeration, liming materials, preplant fertilizer, irrigation-water sources, water-soluble fertilizers, and plant species, interact to affect medium pH and nutrient management. However, these chemical properties do not affect medium pH or the nutrient supply simultaneously or with equal intensity. The objective of this review is to consider key chemical properties of container media and their affects on pH and nutrient management initially and over time.
thiosulphate [STS (an ethylene inhibitor)], JA, and SA can affect the emission of volatiles from wisteria flowers. In this article, we report the comprehensive analysis of wisteria floral scent: chemical composition, emission patterns, and regulation. Volatile
in their perception of the aromatic chemicals emitted from flowers of Ptelea . Although horticultural attention has focused on P. trifoliata , commonly known as hop tree or wafer ash, the genus includes two other species, P. crenulata and
Abstract
Interest in artificial control of budbreak of deciduous fruit trees species is closely connected with commercial attempts to grow these species in warm locations, where the chilling requirements are not fulfilled naturally. This interest developed following attempts to grow such species in warm countries that did not want to or could not import these fruits from cooler regions. In subtropical regions like the Cape zone in South Africa, eastern Australia, and Israel, the problem was more acute in the 1950s and 1960s. Adoption of low-chilling cultivars, or a shift of production to cooler, better-adapted areas, improved tree performance considerably. Nevertheless, sporadic problems after exceptionally warm winters still pose a commercial problem. In other areas, such as southeastern United States, the risk of spring frost is such that low-chilling cultivars with their early budbreak cannot be grown in northern locations, and, in such regions, chemical treatments are needed occasionally.
isovalerate, and benzyl tiglate, were compared. The emission rates of these six compounds from the flowers of ‘Fireworks’ under six conditions (control, chemical treatments with STS, SA, and JA, and under light or dark) were subject to cluster analysis. The
introduced species and be alert for species of concern. Although there are reports of fountain grass seeding into natural areas and being considered invasive, chemical control has not been thoroughly studied. Several studies have evaluated grass
used in foliar applications that chemically pinches the plant by causing meristematic death and the promotion of lateral branching. A secondary benefit is that treated plants may require less fertilizer and water than pinched plants as plant growth is