ASHS Press Releases

American Society for Horticultural Science

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Recycled Artificial Wetlands Water: Alternative to Greenhouse Effluents

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Treated water from artificial wetlands inhibits root rot in tomato plants

Three nutrient solutions made with artificial wetlands effluents were compared with a control solution to investigate the effects of treated waters on development of a common pathogen on tomato root. Growth of Pythium ultimum was significantly inhibited by the treated water compared to the untreated water; however, root growth was adversely affected by treated water. Findings suggest that greenhouses should blend artificial wetlands water with fresh water to reduce mineral accumulation and maintain nutrient balance.

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Long-term Effects of Peach Production Systems Evaluated

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"Pillar" peach varieties contribute to yield, economic value in high-density systems

Long-term Effects of Peach Production Systems EvaluatedA research study evaluated the interactions of pruning strategies, groundcover management, tree densities, and peach architecture combined in eight peach production systems on crop yield and economic value. The results showed that the use of sod management reduced pruning time and costs, but the reduction of crop load reduced net return. High-density plantings in large vegetation-free areas had greater economic return than low-density plantings.

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Crop Load Adjustment Strategies Compared in 'Seyval Blanc' Winegrape

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Thinning techniques result in taster preferred wines, increased production costs

Four crop load management treatments were applied to 'Seyval Blanc' grapevines in a winery in upstate New York. Grapes from the treatments were made into wine and rated by a panel of tasters. The researchers' cost/return analysis recommended that crop load reduction techniques may only be economically justified if crop load is extremely high, and/or during poor growing seasons.

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Irrigation Key to Plant Diversity, Survival on Green Roofs

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New plant palate possible with irrigation systems

Irrigation Key to Plant Diversity, Survival on Green RoofsNineteen species and cultivars of succulents, grasses, and forbs were evaluated under seasonal irrigated and non-irrigated conditions on experimental green roofs in Alabama. Only succulents like stonecrops survived without irrigation. The experiments showed that irrigated experimental green roofs had significantly lower summer substrate temperatures, and many plants survived both winter and summer under irrigated conditions. The study recommends irrigation for extensive green roofs to increase plant options.

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Community Gardening Supports Stress Reduction, Healthy Aging

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UK study supports benefits of gardening for older adults

Community Gardening Supports Stress Reduction, Healthy AgingA study explored the potential benefits of "allotment" (community) gardening for healthy aging, focusing on the opportunities for outdoor physical activity, social support, and contact with nature. Participants included 94 individuals aged between 50 and 88 years who were members of various indoor and outdoor activity groups. Allotment gardeners reported significantly less perceived stress than participants of indoor exercise classes.

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Brassicaceae Cover Crops Tested as Methyl Bromide Alternative

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Oilseed radish, mustard covers "unacceptable" for muskmelon production

Field and laboratory studies were conducted to determine the impact of Brassicaceae cover crops on cucurbit germination percentages and stand counts. A field study examined the effect of oilseed radish, oriental mustard, and yellow mustard green manures on muskmelon stand. Results suggested that spring-planted oilseed radish and mustard cover crops are not recommended for muskmelon production under Michigan growing conditions; however, late summer or fall planting could be alternative preparations for crop production the following summer.

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