The Experts below are selected from a list of 123 Experts worldwide ranked by ideXlab platform
Ryosuke Endo - One of the best experts on this subject based on the ideXlab platform.
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development of an in vitro hydroponic culture system for wasabi Nursery Plant production effects of nutrient concentration and supporting material on Plantlet growth
Scientia Horticulturae, 2019Co-Authors: Nhung Ngoc Hoang, Yoshiaki Kitaya, Toshio Shibuya, Ryosuke EndoAbstract:Abstract The growth of wasabi (Wasabia japonica Matsumura) Plantlets was compared in four concentrations of standard Enshi nutrient solution (25%, 50%, 100%, and 150%) and two kinds of supporting materials (rockwool and vermiculite) using an in vitro hydroponic culture system for photoautotrophic micropropagation. After 28 days of culture, most of the growth parameters such as fresh weight and dry weight, shoot/root dry weight ratio, and leaf area ratio were highest in wasabi Plantlets grown in 50% or 100% nutrient solution, and this enhancement was greater in vermiculite than in rockwool. Dissolved oxygen concentration decreased sharply in rockwool but only slightly in vermiculite during the course of the experiment, resulting in a dissolved oxygen concentration of 8 mg L−1 in the vermiculite and 6 mg L−1 in the rockwool. The highest root nitrogen concentration was observed at a nutrient concentration of 100% in vermiculite and rockwool. The highest net photosynthetic rates were observed on day 28 in vermiculite at nutrient concentrations of 50% and 100%. The growth of wasabi Plantlets is depressed through a decrease in root water and nutrient uptake caused by low dissolved oxygen concentrations. These findings clearly demonstrate that a hydroponic system that incorporates a 50% or 100% nutrient solution concentration and vermiculite will allow high-quality wasabi Plantlets to be propagated rapidly under photoautotrophic conditions.
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Development of an in vitro hydroponic culture system for wasabi Nursery Plant production—Effects of nutrient concentration and supporting material on Plantlet growth
Scientia Horticulturae, 2019Co-Authors: Nhung Ngoc Hoang, Yoshiaki Kitaya, Toshio Shibuya, Ryosuke EndoAbstract:Abstract The growth of wasabi (Wasabia japonica Matsumura) Plantlets was compared in four concentrations of standard Enshi nutrient solution (25%, 50%, 100%, and 150%) and two kinds of supporting materials (rockwool and vermiculite) using an in vitro hydroponic culture system for photoautotrophic micropropagation. After 28 days of culture, most of the growth parameters such as fresh weight and dry weight, shoot/root dry weight ratio, and leaf area ratio were highest in wasabi Plantlets grown in 50% or 100% nutrient solution, and this enhancement was greater in vermiculite than in rockwool. Dissolved oxygen concentration decreased sharply in rockwool but only slightly in vermiculite during the course of the experiment, resulting in a dissolved oxygen concentration of 8 mg L−1 in the vermiculite and 6 mg L−1 in the rockwool. The highest root nitrogen concentration was observed at a nutrient concentration of 100% in vermiculite and rockwool. The highest net photosynthetic rates were observed on day 28 in vermiculite at nutrient concentrations of 50% and 100%. The growth of wasabi Plantlets is depressed through a decrease in root water and nutrient uptake caused by low dissolved oxygen concentrations. These findings clearly demonstrate that a hydroponic system that incorporates a 50% or 100% nutrient solution concentration and vermiculite will allow high-quality wasabi Plantlets to be propagated rapidly under photoautotrophic conditions.
Roger A Hinson - One of the best experts on this subject based on the ideXlab platform.
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market channel selections by us Nursery Plant producers a multivariate nonparametric fractional regression analysis
Journal of Applied Statistics, 2018Co-Authors: Mahesh Pandit, Krishna P Paudel, Roger A HinsonAbstract:Availability of market channel alternatives has helped the growth of ornamental Plant sales in the United States. To identify the factors affecting the choice and allocation of outputs to different market channels by Nursery producers, we first use a mixture of experts model to select clusters of homogenous subpopulations of US Nursery producers based on a 2009 National Nursery Survey. The impact of growers’ business characteristics on shares of sales to these channels was estimated using multivariate parametric and nonparametric fractional regression models. Specification tests indicated a nonparametric model was superior to a parametric model in some clusters. Important explanatory variables affecting the sales volume to different channels were sales of Plant groups, kinds of contract sales, promotional expenses, and farm size. Results indicated the existence of clear market segmentation of Nursery producers in the United States.
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irrigation water sources and irrigation application methods used by u s Plant Nursery producers
Water Resources Research, 2016Co-Authors: Krishna P Paudel, Mahesh Pandit, Roger A HinsonAbstract:We examine irrigation water sources and irrigation methods used by U.S. Nursery Plant producers using nested multinomial fractional regression models. We use data collected from the National Nursery Survey (2009) to identify effects of different firm and sales characteristics on the fraction of water sources and irrigation methods used. We find that regions, sales of Plants types, farm income, and farm age have significant roles in what water source is used. Given the fraction of alternative water sources used, results indicated that use of computer, annual sales, region, and the number of IPM practices adopted play an important role in the choice of irrigation method. Based on the findings from this study, government can provide subsidies to Nursery producers in water deficit regions to adopt drip irrigation method or use recycled water or combination of both. Additionally, encouraging farmers to adopt IPM may enhance the use of drip irrigation and recycled water in Nursery Plant production.
Alicia M. Bray - One of the best experts on this subject based on the ideXlab platform.
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Pre-harvest quarantine treatments of chlorantraniliprole, clothianidin, and other imidacloprid-based insecticides for larval Japanese beetle (Coleoptera: Scarabaeidae) control in field-grown Nursery trees.
Journal of Economic Entomology, 2020Co-Authors: Jason B. Oliver, Christopher M. Ranger, Michael E. Reding, James J. Moyseenko, Nadeer N. Youssef, Alicia M. BrayAbstract:Japanese beetle, Popillia japonica Newman (Coleoptera: Scarabaeidae), is an important quarantine pest of nurseries. Nursery Plant movement from P. japonica-infested regions is regulated by the U.S. Domestic Japanese Beetle Harmonization Plan (DJHP), which classifies states by risk categories. Treatments for category 2 states include preharvest soil surface treatment of Nursery Plants grown in field soil using Discus SC, Marathon (1G or 60 WP), or Flagship (0.22G or 25 WG). In this study, Discus, Marathon 60 WP, or Flagship 0.22G DJHP standards were compared with labeled rates of non-DJHP-approved insecticides, including neonicotinoids clothianidin (Arena 50WDG), generic imidacloprid (Quali-Pro Imidacloprid 2 F TO Marathon, QualiPro, and Mallet (two tests); and Lada and Flagship (one test). Generic imidacloprid 2 F formulations were equivalent in P. japonica control to DJHP-approved insecticides. Insecticides generally performed poorly on other scarabs or curculionid larvae. The study supports Arena, Allectus, and generic imidacloprid 2 F products as suitable candidates for the DJHP.
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Preharvest quarantine treatments of chlorantraniliprole, clothianidin, and imidacloprid-based insecticides for control of Japanese beetle (Coleoptera: Scarabaeidae) and other scarab larvae in the root zone of field-grown Nursery trees.
Journal of Economic Entomology, 2013Co-Authors: Jason B. Oliver, Christopher M. Ranger, Michael E. Reding, James J. Moyseenko, Nadeer N. Youssef, Alicia M. BrayAbstract:ABSTRACT Japanese beetle, Popillia japonica Newman (Coleoptera: Scarabaeidae), is an important quarantine pest of nurseries. Nursery Plant movement from P. japonica-infested regions is regulated by the U.S. Domestic Japanese Beetle Harmonization Plan (DJHP), which classifies states by risk categories. Treatments for category 2 states include preharvest soil surface treatment of Nursery Plants grown in field soil using Discus SC, Marathon (1G or 60 WP), or Flagship (0.22G or 25 WG). In this study, Discus, Marathon 60 WP, or Flagship 0.22G DJHP standards were compared with labeled rates of non-DJHP-approved insecticides, including neonicotinoids clothianidin (Arena 50WDG), generic imidacloprid (Quali-Pro Imidacloprid 2 F T&O Insecticide, Mallet 2 F T&O Insecticide, and Lada 2 F Insecticide), and imidacloprid + bifenthrin (Allectus SC), as well as the anthranilic diamide, chlorantraniliprole (Acelepryn Insecticide). Arena provided 100% P. japonica control in May, June, and July over four test years, but had ...
Stephen J. Wylie - One of the best experts on this subject based on the ideXlab platform.
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Quarantine treatments of imported Nursery Plants and exported cut flowers by phosphine gas (PH 3 ) as methyl bromide alternative
2020Co-Authors: Chung Gyoo Park, Bo Kyung Sung, Y. Mi Moon, Stephen J. WylieAbstract:Quarantine treatments by phosphine (PH3) gas have been performed to replace methyl bromide (MeBr) for export cut flowers and imported Nursery Plant in Korea. In this preliminary study, two dominant insect pests of cut flowers, Tetranychus urticae Koch and Frankliniella occidentalis Pergande, and the dominant insect pest of Nursery Plants, Planococcus citri Risso, were used to certify optimum concentration and fumigation time, along with evaluation of phytotoxic damages. To validate the results of preliminary tests, quarantine treatments for export cut flowers was performed in a 58-m(3) reefer container. When 14 species of cut flowers were fumigated with 2g m(-3) PH3 for 24 h (Ct product was 30.9g h m(-3)) at 5 degrees C, all pests were effectively controlled and no phytotoxic damage were observed on roses and chrysanthemums. On quarantine trials for imported Nursery trees, which was performed at 10 m(3) scale covered with a PVC-tarpaulin tent, 2 g m(-3) of PH3 for 24 h (Ct product was 30.0g h m(-3)) at 15 degrees C was enough to kill all pests and no damage was observed on seven species of Nursery Plants. Phosphine gas shows the promise as MeBr alternative to perishable commodities in terms of efficacy to certain quarantine pest and maintenance of its quality as well as being a more environmentally safe fumigant.
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Quarantine Treatments of Imported Nursery Plants and Exported Cut Flowers by Phosphine Gas (PH3) as Methyl Bromide Alternative
Journal of Economic Entomology, 2016Co-Authors: Chung Gyoo Park, Young-mi Moon, Bo Kyung Sung, Stephen J. WylieAbstract:Quarantine treatments by phosphine (PH3) gas have been performed to replace methyl bromide (MeBr) for export cut flowers and imported Nursery Plant in Korea. In this preliminary study, two dominant insect pests of cut flowers, Tetranychus urticae Koch and Frankliniella occidentalis Pergande, and the dominant insect pest of Nursery Plants, Planococcus citri Risso, were used to certify optimum concentration and fumigation time, along with evaluation of phytotoxic damages. To validate the results of preliminary tests, quarantine treatments for export cut flowers was performed in a 58-m3 reefer container. When 14 species of cut flowers were fumigated with 2 g m−3 PH3 for 24 h ( Ct product was 30.9 g h m−3) at 5 °C, all pests were effectively controlled and no phytotoxic damage were observed on roses and chrysanthemums. On quarantine trials for imported Nursery trees, which was performed at 10 m3 scale covered with a PVC-tarpaulin tent, 2 g m−3 of PH3 for 24 h ( Ct product was 30.0 g h m−3) at 15 °C was enough to kill all pests and no damage was observed on seven species of Nursery Plants. Phosphine gas shows the promise as MeBr alternative to perishable commodities in terms of efficacy to certain quarantine pest and maintenance of its quality as well as being a more environmentally safe fumigant.
Nhung Ngoc Hoang - One of the best experts on this subject based on the ideXlab platform.
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development of an in vitro hydroponic culture system for wasabi Nursery Plant production effects of nutrient concentration and supporting material on Plantlet growth
Scientia Horticulturae, 2019Co-Authors: Nhung Ngoc Hoang, Yoshiaki Kitaya, Toshio Shibuya, Ryosuke EndoAbstract:Abstract The growth of wasabi (Wasabia japonica Matsumura) Plantlets was compared in four concentrations of standard Enshi nutrient solution (25%, 50%, 100%, and 150%) and two kinds of supporting materials (rockwool and vermiculite) using an in vitro hydroponic culture system for photoautotrophic micropropagation. After 28 days of culture, most of the growth parameters such as fresh weight and dry weight, shoot/root dry weight ratio, and leaf area ratio were highest in wasabi Plantlets grown in 50% or 100% nutrient solution, and this enhancement was greater in vermiculite than in rockwool. Dissolved oxygen concentration decreased sharply in rockwool but only slightly in vermiculite during the course of the experiment, resulting in a dissolved oxygen concentration of 8 mg L−1 in the vermiculite and 6 mg L−1 in the rockwool. The highest root nitrogen concentration was observed at a nutrient concentration of 100% in vermiculite and rockwool. The highest net photosynthetic rates were observed on day 28 in vermiculite at nutrient concentrations of 50% and 100%. The growth of wasabi Plantlets is depressed through a decrease in root water and nutrient uptake caused by low dissolved oxygen concentrations. These findings clearly demonstrate that a hydroponic system that incorporates a 50% or 100% nutrient solution concentration and vermiculite will allow high-quality wasabi Plantlets to be propagated rapidly under photoautotrophic conditions.
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Development of an in vitro hydroponic culture system for wasabi Nursery Plant production—Effects of nutrient concentration and supporting material on Plantlet growth
Scientia Horticulturae, 2019Co-Authors: Nhung Ngoc Hoang, Yoshiaki Kitaya, Toshio Shibuya, Ryosuke EndoAbstract:Abstract The growth of wasabi (Wasabia japonica Matsumura) Plantlets was compared in four concentrations of standard Enshi nutrient solution (25%, 50%, 100%, and 150%) and two kinds of supporting materials (rockwool and vermiculite) using an in vitro hydroponic culture system for photoautotrophic micropropagation. After 28 days of culture, most of the growth parameters such as fresh weight and dry weight, shoot/root dry weight ratio, and leaf area ratio were highest in wasabi Plantlets grown in 50% or 100% nutrient solution, and this enhancement was greater in vermiculite than in rockwool. Dissolved oxygen concentration decreased sharply in rockwool but only slightly in vermiculite during the course of the experiment, resulting in a dissolved oxygen concentration of 8 mg L−1 in the vermiculite and 6 mg L−1 in the rockwool. The highest root nitrogen concentration was observed at a nutrient concentration of 100% in vermiculite and rockwool. The highest net photosynthetic rates were observed on day 28 in vermiculite at nutrient concentrations of 50% and 100%. The growth of wasabi Plantlets is depressed through a decrease in root water and nutrient uptake caused by low dissolved oxygen concentrations. These findings clearly demonstrate that a hydroponic system that incorporates a 50% or 100% nutrient solution concentration and vermiculite will allow high-quality wasabi Plantlets to be propagated rapidly under photoautotrophic conditions.
