Ryan W. Dickson
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Short Report: Temperature Effects on Plant Development Rate and Quality of Compact Container-grown Cucumber and Hot Pepper Open
Mean daily temperature (MDT) effects on plant development rates and quality were evaluated for compact container-grown cucumber (‘Patio Snacker’) and pepper (‘Taquito’) grown at greenhouse set-points of 20.0, 22.5, 25.0, 27.5, and 30.0 °C.…
Blackberry Long-cane Cold Storage and Forcing Strategy Effects on Flower and Fruit Development Open
Blackberry ( Rubus subg. Rubus) production using soilless culture and “long-cane” techniques offers growers the potential to achieve off-season harvests and increase yields. This study investigated the feasibility of achieving early spring…
Quantifying Temperature Effects on Development Rate and Plant Quality of Compact Container-grown Tomato Open
Mean daily temperature effects on plant development rates and quality were evaluated for compact container-grown tomato ( Solanum lycopersicum ). Compact tomato varieties ‘Siam’ and ‘Red Velvet’ were grown in greenhouses at 18 to 26 °C (Ex…
Strategic Light Use Efficiency Optimization of Hydroponic Lettuce Exposed to Different Photosynthetic Photon Flux Densities Open
Light use efficiency characterizes the ability of a crop to convert radiation into biomass. Determining optimum cultivar-specific photosynthetic photon flux density (PPFD) values from sole-source lighting can be used to optimize leaf expan…
Quantifying Temperature Effects on Plant Development Rates and Quality of Compact Container-grown Pepper Open
The mean daily temperature effects on plant development rates and quality of compact container-grown pepper were evaluated. Compact pepper cultivars Fresh Bites Yellow and Hot Burrito were grown in greenhouses at 18 to 26 °C (Expt. 1) and …
Morphological and Physiological Changes of Hydroponic Lettuce Grown in Varying Potassium Concentrations and an Adaptive Lighting Control System Open
We investigated the growth dynamics of hydroponic lettuce ( Lactuca sativa ) driven by the influence that potassium (K + ) has on crop growth. This study aimed to determine whether increased K + concentrations under different daily light i…
Exploring Leaf Anthocyanin Concentrations and Light Effects on Lettuce Growth Open
Anthocyanins are secondary metabolites classified as water-soluble, non-photosynthetic pigments with the potential ability to shield chloroplasts from excess light energy. This study investigated the morphological and physiological respons…
Evaluation of Drought Tolerance in USDA Tomato Germplasm at Seedling Stage Open
Drought, a crucial abiotic stressor, markedly reduces the growth and yield of tomato crops (Solanum lycopersicum L.). Consequently, adopting drought-resistant cultivars and implementing breeding programs to enhance drought tolerance have e…
An Evaluation of Bacterial Wilt (Ralstonia solanacearum) Resistance in a Set of Tomato Germplasm from the United States Department of Agriculture Open
Bacterial wilt (BW), caused by Ralstonia solanacearum, is one of the devastating diseases in tomatoes (Solanum lycopersicum L.). The use of resistant cultivars and breeding for genetic resistance is the most effective, economical, and envi…
Evaluation of Drought Tolerance in USDA Tomato Germplasm at Seedling Stage Open
Drought, a crucial abiotic stressor, markedly reduces the growth and yield of tomato crops (Solanum lycopersicum L.). Consequently, adopting drought-resistant cultivars and implementing breeding programs to enhance drought tolerance have e…
Evaluation of Bacterial Wilt (Ralstonia solanacearum) Resistance in a Set of USDA Tomato Germplasm Open
Bacterial wilt (BW), caused by Ralstonia solanacearum, is one of the devastating diseases of tomatoes (Solanum lycopersicum L.). The use of resistant cultivars and breeding for genetic resistance is the most effective, economical, and envi…
Genome-Wide Association Study and Genomic Prediction of Fusarium Wilt Resistance in Common Bean Core Collection Open
The common bean (Phaseolus vulgaris L.) is a globally cultivated leguminous crop. Fusarium wilt (FW), caused by Fusarium oxysporum f. sp. phaseoli (Fop), is a significant disease leading to substantial yield loss in common beans. Disease-r…
Forcing Temperature Effects on Plant Development for Containerized Blackberry Grown Using Long-Cane Techniques Open
Dormant containerized blackberry plants grown as long canes are forced into protected environments, such as plastic tunnels or greenhouses, to schedule harvesting for important market weeks. The time needed to produce a crop is mainly a fu…
Metal Micronutrient and Silicon Concentration Effects on Growth and Susceptibility to Pythium Root Rot for Hydroponic Lettuce (Lactuca sativa) Open
The objectives were to evaluate the effects of increasing metal micronutrient concentrations and silicon (Si) concentrations on plant growth and susceptibility to Pythium root rot with hydroponically grown lettuce (Lactuca sativa). In the …
Evaluating Species-Specific Replenishment Solution Effects on Plant Growth and Root Zone Nutrients with Hydroponic Arugula (Eruca sativa L.) and Basil (Ocimum basilicum L.) Open
Managing nutrients in recirculating solutions can be challenging in hydroponic production, and poor management practices can rapidly result in root zone nutrient imbalances in reduced yield. Using mass balance principles to formulate hydro…
Evaluation of Peat Blended with Pine Wood Components for Effects on Substrate Physical Properties, Nitrogen Immobilization, and Growth of Petunia (Petunia ×hybrida Vilm.-Andr.) Open
The first objective was to evaluate wood components for differences in nitrogen (N) immobilization and effects on substrate physical properties. The second objective was to evaluate peat substrates amended with pine wood components for eff…
Silicon Foliar Spray and Substrate Drench Effects on Plant Growth, Morphology, and Resistance to Wilting with Container-Grown Edible Species Open
The objective of this study was to evaluate silicon (Si) foliar spray and substrate drench effects on plant growth and morphology for container-grown edible crops during greenhouse production, as well as resistance to plant wilting during …
Fertilizer and Plant Growth Regulator Strategies for Improving Consumer Performance of Container-grown Petunia Open
The overall goal was to evaluate fertilizer options for greenhouse producers, with or without a plant growth regulator (PGR) application, to improve subsequent performance of container-grown annuals. Petunia ( Petunia × hybrida ) was the m…
Evaluation of a Novel Shallow Aggregate Ebb-and-flood Culture System and Transplant Size Effects on Hydroponic Basil Yield Open
Ornamental bedding plant operations transitioning to leafy greens and herb production must decide whether to invest in new hydroponic equipment or modify existing culture systems for edible crops. In addition, common practices used to incr…
Effects of Low Temperature and Low Light on Physiology of Tomato Seedlings Open
The physiological changes and the mechanism of stress tolerance in tomato were studied under low temperature and low light conditions. Two growth chamber experiments evaluated three temperatures regimes under standard and relatively low il…
Evaluating Peat Substrates Amended with Pine Wood Fiber for Nitrogen Immobilization and Effects on Plant Performance with Container-grown Petunia Open
Pine ( Pinus sp.) wood products have potential to immobilize fertilizer nitrogen (N) and influence plant growth when used in soilless substrates for the production of containerized floriculture crops. Peat substrate was amended with (by vo…
Controlled Environment Food Production for Urban Agriculture Open
The recent increased market demand for locally grown produce is generating interest in the application of techniques developed for controlled environment agriculture (CEA) to urban agriculture (UA). Controlled environments have great poten…
Quantifying the Acidic and Basic Effects of Vegetable and Herb Species in Peat-based Substrate and Hydroponics Open
Objectives were 1) to quantify acidic and basic effects on the root zone pH for eight vegetable and herb species grown in peat-based substrate and hydroponic nutrient solution and 2) to determine the applied NH 4 + :NO 3 – ratio expected t…
Quantifying the Acidic and Basic Effects of Fifteen Floriculture Species Grown in Peat-based Substrate Open
Floriculture species differ in their effect on substrate-pH and the resulting substrate micronutrient availability in container production. The objective was to quantify effects of floriculture plant species on substrate-pH. In a growth ch…
Evaluating Calibrachoa (Calibrachoa ×hybrida Cerv.) Genotype Sensitivity to Iron Deficiency at High Substrate pH Open
Floriculture crop species that are inefficient at iron uptake are susceptible to developing iron deficiency symptoms in container production at high substrate pH. The objective of this study was to compare genotypes of iron-inefficient cal…