Pub Date : 2023-10-01DOI: 10.21273/horttech05266-23
L. Gettys
Horticulturists and agronomists have a long history of using selective breeding to take advantage of intraspecific (within-species) variation with the goal of developing novel varieties of plant species. These efforts are responsible for the availability of countless improved food, forage, and ornamental varieties that are valued by farmers, landscapers, and home gardeners. In contrast, little attention has been paid to the idea of evaluating intraspecific variation to identify plants derived from a specific ecosystem (ecotypes) of native species that could improve the success rate of habitat restoration and enhancement projects, especially in aquatic systems. These projects often specify that plant material used for restoration be collected from local donor sites to preserve the area’s gene pool, but nearby source populations may be nonexistent or may not be well-adapted to conditions at the recipient (transplant) site. This paper, which summarizes information presented at the American Society for Horticultural Science Invasive Plants Research Professional Interest Group workshop in 2022, provides evidence that unimproved, wild-type species can be useful in aquatic habitat restoration and enhancement projects, particularly when conditions at sites targeted for restoration differ from those in nearby systems, or when sites are expected to undergo shifts in conditions because of factors such as climate change.
{"title":"A Rose Is a Rose Is a Rose... Or Is It? Ecotypes versus Locally Sourced Plants for Aquatic Habitat Restoration and Enhancement Projects","authors":"L. Gettys","doi":"10.21273/horttech05266-23","DOIUrl":"https://doi.org/10.21273/horttech05266-23","url":null,"abstract":"Horticulturists and agronomists have a long history of using selective breeding to take advantage of intraspecific (within-species) variation with the goal of developing novel varieties of plant species. These efforts are responsible for the availability of countless improved food, forage, and ornamental varieties that are valued by farmers, landscapers, and home gardeners. In contrast, little attention has been paid to the idea of evaluating intraspecific variation to identify plants derived from a specific ecosystem (ecotypes) of native species that could improve the success rate of habitat restoration and enhancement projects, especially in aquatic systems. These projects often specify that plant material used for restoration be collected from local donor sites to preserve the area’s gene pool, but nearby source populations may be nonexistent or may not be well-adapted to conditions at the recipient (transplant) site. This paper, which summarizes information presented at the American Society for Horticultural Science Invasive Plants Research Professional Interest Group workshop in 2022, provides evidence that unimproved, wild-type species can be useful in aquatic habitat restoration and enhancement projects, particularly when conditions at sites targeted for restoration differ from those in nearby systems, or when sites are expected to undergo shifts in conditions because of factors such as climate change.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48152615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.21273/horttech05217-23
S. Burnett, B. Peterson, Isabella B. Oliveira, Taylor Bowers
A BSTRACT . Dahlias ( Dahlia × hybrida ) are a popular cut fl ower for local production in the northeastern United States. However, there are more than 20,000 cultivars to choose from, and the suitability of these cultivars as cut fl owers varies regionally. Fourteen dahlia cultivars were grown in Orono, ME, USA: Blizzard, Burlesca, Caf (cid:1) e au Lait, Caf (cid:1) e au Lait Rose, Clearview Daniel, Cornel, Cornel Bronze, Ivanetti, Lollipop, Neon Splendor, Rock Run Ashley, Sunspot, Tanjoh, and Tempest. These cultivars were selected after interviews with local dahlia growers. These cultivars all produced similar numbers of fl owers, but they differed in the time to form fl owers, stem length, and stem diameter. ‘ Rock Run Ashley ’ was the earliest to begin fl owering, at 35 days earlier than ‘ Tempest ’ and ‘ Caf (cid:1) e au Lait ’ , which fl owered last. ‘ Blizzard ’ and ‘ Tempest ’ had the longest stems and ‘ Lollipop ’ had the shortest stems. Growers may want to choose ‘ Rock Run Ashley ’ if they need fl owers earlier in the season, or ‘ Blizzard ’ or ‘ Tempest ’ if a longer stem length is desired. During a second study, we harvested fi eld-grown fl owers of ‘ Burlesca ’ , ‘ Cornel ’ , and ‘ Ivanetti ’ and treated them with deionized water or one of two commercial holding solutions. Holding solutions did not extend the vase life of ‘ Burlesca ’ or ‘ Ivanetti ’ , but they increased the vase life of ‘ Cornel ’ by 4 or 5 days.
摘要。大丽花（Dahlia×hybrida）是美国东北部当地生产的一种流行的切花。然而，有20000多个品种可供选择，这些品种作为切花的适宜性因地区而异。在美国缅因州奥罗诺种植了14个大丽花品种：暴雪、伯莱斯卡、Caf（cid:1）e au Lait、Caf。这些品种是在与当地大丽花种植者面谈后选出的。这些品种都产生了相似数量的花，但它们在形成花的时间、茎长和茎直径方面有所不同。”Rock Run Ashley是最早开始发力的，比最后发力的Tempest和Caf（cid:1）e au Lait早了35天暴雪和暴风雪的梗最长，棒棒糖的梗最短。如果种植者在本季早些时候需要开花，他们可能会选择“Rock Run Ashley”，如果想要更长的茎长，则可以选择“Blizzard”或“Tempest”。在第二项研究中，我们收获了“Burlesca”、“Cornell”和“Ivanetti”的实地生长的花朵，并用去离子水或两种商业保存溶液中的一种进行处理。保温溶液并没有延长“Burlesca”或“Ivanetti”的花瓶寿命，但它们使“Cornel”的花瓶使用寿命增加了4或5天。
{"title":"Comparison of Dahlia Cultivars for Cut Flower Production in the Northeastern United States","authors":"S. Burnett, B. Peterson, Isabella B. Oliveira, Taylor Bowers","doi":"10.21273/horttech05217-23","DOIUrl":"https://doi.org/10.21273/horttech05217-23","url":null,"abstract":"A BSTRACT . Dahlias ( Dahlia × hybrida ) are a popular cut fl ower for local production in the northeastern United States. However, there are more than 20,000 cultivars to choose from, and the suitability of these cultivars as cut fl owers varies regionally. Fourteen dahlia cultivars were grown in Orono, ME, USA: Blizzard, Burlesca, Caf (cid:1) e au Lait, Caf (cid:1) e au Lait Rose, Clearview Daniel, Cornel, Cornel Bronze, Ivanetti, Lollipop, Neon Splendor, Rock Run Ashley, Sunspot, Tanjoh, and Tempest. These cultivars were selected after interviews with local dahlia growers. These cultivars all produced similar numbers of fl owers, but they differed in the time to form fl owers, stem length, and stem diameter. ‘ Rock Run Ashley ’ was the earliest to begin fl owering, at 35 days earlier than ‘ Tempest ’ and ‘ Caf (cid:1) e au Lait ’ , which fl owered last. ‘ Blizzard ’ and ‘ Tempest ’ had the longest stems and ‘ Lollipop ’ had the shortest stems. Growers may want to choose ‘ Rock Run Ashley ’ if they need fl owers earlier in the season, or ‘ Blizzard ’ or ‘ Tempest ’ if a longer stem length is desired. During a second study, we harvested fi eld-grown fl owers of ‘ Burlesca ’ , ‘ Cornel ’ , and ‘ Ivanetti ’ and treated them with deionized water or one of two commercial holding solutions. Holding solutions did not extend the vase life of ‘ Burlesca ’ or ‘ Ivanetti ’ , but they increased the vase life of ‘ Cornel ’ by 4 or 5 days.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46558198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.21273/horttech05251-23
Liam Dixon, Irwin L. Goldman
Cercospora leaf spot (CLS), caused by the fungal pathogen Cercospora beticola, is the most destructive foliar disease of table beet (Beta vulgaris ssp. vulgaris) in Wisconsin, USA, and globally. Under conducive conditions, symptomatic lesions on the leaf expand and coalesce forming large necrotic areas that can ultimately lead to complete defoliation. This damage reduces productivity and threatens the ability to mechanically harvest. CLS damage also detracts from the visual appeal of fresh market bunched beets to such an extent that growers risk buyer rejection if CLS severity is observed to be greater than 5%. Fungicide use for CLS control is threatened by the emergence of resistant C. beticola strains, and the application of host resistance is constrained by limited knowledge of cultivar reaction to CLS in table beet. This study aimed to address the knowledge gaps of fungicide efficacy and cultivar reaction by conducting replicated field trials in multiple table beet growing environments across Wisconsin. Broad variation for resistance to CLS was observed among the 10 included cultivars. The mean area under disease progress curve (AUDPC) across environments for the most susceptible cultivar was 267% greater than the most resistant cultivar. Spearman correlations between environments for mean cultivar AUDPC value ranged from 0.71 to 0.99, revealing consistent cultivar CLS reactions across environments. Although susceptible cultivars surpassed 5% severity in all environments, the resistant cultivars remained below this threshold in six of the 10 environments. By comparison with resistant sugar beet (Beta vulgaris ssp. vulgaris) cultivars, however, all tested table beets appeared susceptible to CLS, highlighting the potential for a CLS breeding effort in table beet. Neither of the evaluated Organic Materials Review Institute–listed treatments were effective at limiting CLS disease progress, whereas both tested conventional fungicides significantly reduced disease severity over the nontreated plots. These findings may provide helpful guidance to table beet growers affected by CLS in Wisconsin and beyond.
{"title":"Cultivar and Fungicide Evaluations for Cercospora Leaf Spot Control in Organic and Conventional Table Beet Production","authors":"Liam Dixon, Irwin L. Goldman","doi":"10.21273/horttech05251-23","DOIUrl":"https://doi.org/10.21273/horttech05251-23","url":null,"abstract":"Cercospora leaf spot (CLS), caused by the fungal pathogen Cercospora beticola, is the most destructive foliar disease of table beet (Beta vulgaris ssp. vulgaris) in Wisconsin, USA, and globally. Under conducive conditions, symptomatic lesions on the leaf expand and coalesce forming large necrotic areas that can ultimately lead to complete defoliation. This damage reduces productivity and threatens the ability to mechanically harvest. CLS damage also detracts from the visual appeal of fresh market bunched beets to such an extent that growers risk buyer rejection if CLS severity is observed to be greater than 5%. Fungicide use for CLS control is threatened by the emergence of resistant C. beticola strains, and the application of host resistance is constrained by limited knowledge of cultivar reaction to CLS in table beet. This study aimed to address the knowledge gaps of fungicide efficacy and cultivar reaction by conducting replicated field trials in multiple table beet growing environments across Wisconsin. Broad variation for resistance to CLS was observed among the 10 included cultivars. The mean area under disease progress curve (AUDPC) across environments for the most susceptible cultivar was 267% greater than the most resistant cultivar. Spearman correlations between environments for mean cultivar AUDPC value ranged from 0.71 to 0.99, revealing consistent cultivar CLS reactions across environments. Although susceptible cultivars surpassed 5% severity in all environments, the resistant cultivars remained below this threshold in six of the 10 environments. By comparison with resistant sugar beet (Beta vulgaris ssp. vulgaris) cultivars, however, all tested table beets appeared susceptible to CLS, highlighting the potential for a CLS breeding effort in table beet. Neither of the evaluated Organic Materials Review Institute–listed treatments were effective at limiting CLS disease progress, whereas both tested conventional fungicides significantly reduced disease severity over the nontreated plots. These findings may provide helpful guidance to table beet growers affected by CLS in Wisconsin and beyond.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41873883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.21273/horttech05277-23
S. Parrish, Tina McIntyre, Morgan G. Pinkerton, Sandra B. Wilson
The newly released “Plant This Not That: A Guide to Avoiding Invasive Plant Species in Florida” booklet emerges as a crucial tool in cultivating a comprehensive understanding of invasive species, facilitating informed decision-making in plant selection. Its unique focus on illustrating alternatives to invasive plants, coupled with its accessible format, can empower individuals to contribute to the preservation of Florida, USA, ecosystems. The booklet’s impact was displayed through an in-service training for 58 University of Florida/Institute of Food and Agricultural Sciences extension personnel. Following the in-service training, attendees demonstrated statistically significant improvements in their perceived knowledge of four key invasive species concepts. This study highlights the booklet and accompanying training’s potential as a valuable resource for mitigating the impacts of invasive plant species.
{"title":"Plant This Not That: A Tool for Improving Invasive Species Identification and Expanding the Use of Sustainable Alternatives in Florida, USA, Landscaping","authors":"S. Parrish, Tina McIntyre, Morgan G. Pinkerton, Sandra B. Wilson","doi":"10.21273/horttech05277-23","DOIUrl":"https://doi.org/10.21273/horttech05277-23","url":null,"abstract":"The newly released “Plant This Not That: A Guide to Avoiding Invasive Plant Species in Florida” booklet emerges as a crucial tool in cultivating a comprehensive understanding of invasive species, facilitating informed decision-making in plant selection. Its unique focus on illustrating alternatives to invasive plants, coupled with its accessible format, can empower individuals to contribute to the preservation of Florida, USA, ecosystems. The booklet’s impact was displayed through an in-service training for 58 University of Florida/Institute of Food and Agricultural Sciences extension personnel. Following the in-service training, attendees demonstrated statistically significant improvements in their perceived knowledge of four key invasive species concepts. This study highlights the booklet and accompanying training’s potential as a valuable resource for mitigating the impacts of invasive plant species.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42436936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.21273/horttech05230-23
Caroline Nickerson, Christine Krebs, Laura A. Warner, Lauri Baker, Jaret Daniels, Adam Dale
This article shares survey results provided by both consumers and growers regarding the University of Florida Biodiversity Certified Plants for the Rapidly Expanding Urban Landscape Market project conducted at the University of Florida (UF). The overall goal of this project was to develop and test a scientifically based, UF-trademarked process for the certification of high-quality, commercially available, wildlife-friendly plants for the green industry. The objectives of two surveys that targeted consumers and growers, respectively, were to assess consumer and grower attitudes, knowledge, and behaviors pertaining to wildlife-friendly plants and a proposed certification. The consumer survey results ( n = 868) indicated that respondents (consumers) strongly agreed with purchasing wildlife-friendly plants, and that respondents would benefit from the proposed certification. The certification could help consumers gain a better understanding of which plants are wildlife-friendly at the point of purchase. Nearly half of consumers reported an inability to identify wildlife-friendly plants in the store, which hinders them from purchasing. The grower survey results ( n = 75) indicated that respondents were willing to offer biodiversity-certified plants. More growers rated themselves as innovators (the most innovative category) in terms of adopting innovations than any other diffusion of innovations category (early adopter, early majority, later majority, hesitant, or none of these), although the perceived cost of obtaining the certification was seen as a potential barrier toward grower adoption of the certification. These findings indicate that the proposed certification would be successful with appropriate and tailored marketing materials for both growers and consumers.
{"title":"Attitudes Toward and Preferences of Florida Consumers and Growers Regarding a Proposed Scientifically Based University Certification Process for Wildlife-friendly Plants","authors":"Caroline Nickerson, Christine Krebs, Laura A. Warner, Lauri Baker, Jaret Daniels, Adam Dale","doi":"10.21273/horttech05230-23","DOIUrl":"https://doi.org/10.21273/horttech05230-23","url":null,"abstract":"This article shares survey results provided by both consumers and growers regarding the University of Florida Biodiversity Certified Plants for the Rapidly Expanding Urban Landscape Market project conducted at the University of Florida (UF). The overall goal of this project was to develop and test a scientifically based, UF-trademarked process for the certification of high-quality, commercially available, wildlife-friendly plants for the green industry. The objectives of two surveys that targeted consumers and growers, respectively, were to assess consumer and grower attitudes, knowledge, and behaviors pertaining to wildlife-friendly plants and a proposed certification. The consumer survey results ( n = 868) indicated that respondents (consumers) strongly agreed with purchasing wildlife-friendly plants, and that respondents would benefit from the proposed certification. The certification could help consumers gain a better understanding of which plants are wildlife-friendly at the point of purchase. Nearly half of consumers reported an inability to identify wildlife-friendly plants in the store, which hinders them from purchasing. The grower survey results ( n = 75) indicated that respondents were willing to offer biodiversity-certified plants. More growers rated themselves as innovators (the most innovative category) in terms of adopting innovations than any other diffusion of innovations category (early adopter, early majority, later majority, hesitant, or none of these), although the perceived cost of obtaining the certification was seen as a potential barrier toward grower adoption of the certification. These findings indicate that the proposed certification would be successful with appropriate and tailored marketing materials for both growers and consumers.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135368262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.21273/horttech05247-23
Mary Hockenberry Meyer, B. Miller
A long-term, landscape grass hardiness study was initiated in Summer 1987 at the University of Minnesota Landscape Arboretum in Chanhassen, MN, USA [United States Department of Agriculture Plant Hardiness Zone (USDA PHZ) 4b, –20 to –25 °F]. This location averages a 158-day growing season (frost free), summer temperatures of 79.9 °F, and winter temperatures of 10.4 °F. Over 35 years, 392 different kinds of plants from the grass (Poaceae) and sedge (Cyperaceae) families were planted to evaluate winter survival, landscape value, flowering, and pest resistance. Most plants (n = 271, 69%) survived at least 4 years, 186 (47%) survived 10 years, 81 (21%) survived 20 years, and 29 (7%) survived 35 years. Sixty-eight plants (17%) were deemed not winter hardy in this location (USDA PHZ 4b), and 53 are listed with insufficient data for a hardiness rating. Changes in maintenance as well as challenges encountered with long-term trials of herbaceous plants are discussed.
{"title":"Many Landscape Grasses Survive Long-term Hardiness Trials in United States Department of Agriculture Plant Hardiness Zone 4b","authors":"Mary Hockenberry Meyer, B. Miller","doi":"10.21273/horttech05247-23","DOIUrl":"https://doi.org/10.21273/horttech05247-23","url":null,"abstract":"A long-term, landscape grass hardiness study was initiated in Summer 1987 at the University of Minnesota Landscape Arboretum in Chanhassen, MN, USA [United States Department of Agriculture Plant Hardiness Zone (USDA PHZ) 4b, –20 to –25 °F]. This location averages a 158-day growing season (frost free), summer temperatures of 79.9 °F, and winter temperatures of 10.4 °F. Over 35 years, 392 different kinds of plants from the grass (Poaceae) and sedge (Cyperaceae) families were planted to evaluate winter survival, landscape value, flowering, and pest resistance. Most plants (n = 271, 69%) survived at least 4 years, 186 (47%) survived 10 years, 81 (21%) survived 20 years, and 29 (7%) survived 35 years. Sixty-eight plants (17%) were deemed not winter hardy in this location (USDA PHZ 4b), and 53 are listed with insufficient data for a hardiness rating. Changes in maintenance as well as challenges encountered with long-term trials of herbaceous plants are discussed.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41414926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.21273/horttech05254-23
Hanna Ibiapina de Jesus, Andre Luiz Biscaia Ribeiro da Silva, B. Dutta, K. Cassity‐Duffey, T. Coolong
A range of organic fertilizers are available for vegetable crops; however, there is a lack of information regarding the performance and rates of organic fertilizers commonly used in the production of Vidalia onion (Allium cepa). Two commercial organic fertilizers, a mixed source organic fertilizer [MIX (10N–0.9P–6.6K)] and a pelleted poultry litter [PPL (5N–1.8P–2.5K)], were evaluated in two soil types at application rates of 0, 100, 150, 200, 250, and 300 lb/acre nitrogen (N) to determine their impact in the production of Vidalia onions in Georgia, USA, with the objective of determining an optimal fertilizer source and application rate. Field trials were conducted in the 2019–20 and 2020–21 growing seasons in Watkinsville, GA, USA (Cecil series sandy clay loam soil) and Tifton, GA, USA (Tifton series loamy sand soil) on certified organic land. There were significant interactions among location, year, and fertilizer application rate for total marketable yield. In Watkinsville, total marketable yields of onions at different N rates ranged between 1320 and 4565 lb/acre in 2019–20, and between 9951 and 28,749 lb/acre in 2020–21. In Tifton, total marketable yields ranged from 3776 to 9264 lb/acre and 7094 to 14,066 lb/acre in the 2019–20 and 2020–21 seasons, respectively. Aboveground onion N accumulation at harvest was affected by an interaction among location, study year, and fertilizer rate. The largest plant N accumulation was in Watkinsville in 2020–21, ranging from 26 to 50.8 lb/acre N in the 0- and 300-lb/acre N treatments, respectively. In 2020, there were no differences in soil inorganic N at harvest between plots receiving the MIX (9 lb/acre N) or PPL (9.8 lb/acre N) in either location. In 2021, soil inorganic N was greater in plots receiving the MIX fertilizer (14.8 lb/acre N) compared with the PPL fertilizer (11.2 lb/acre N). Yields increased linearly with additional fertilizer; therefore, an optimal application rate for organic fertilizers was not determined.
{"title":"Influence of Organic Fertilizer Sources and Application Rates on Onion Production in Georgia, USA","authors":"Hanna Ibiapina de Jesus, Andre Luiz Biscaia Ribeiro da Silva, B. Dutta, K. Cassity‐Duffey, T. Coolong","doi":"10.21273/horttech05254-23","DOIUrl":"https://doi.org/10.21273/horttech05254-23","url":null,"abstract":"A range of organic fertilizers are available for vegetable crops; however, there is a lack of information regarding the performance and rates of organic fertilizers commonly used in the production of Vidalia onion (Allium cepa). Two commercial organic fertilizers, a mixed source organic fertilizer [MIX (10N–0.9P–6.6K)] and a pelleted poultry litter [PPL (5N–1.8P–2.5K)], were evaluated in two soil types at application rates of 0, 100, 150, 200, 250, and 300 lb/acre nitrogen (N) to determine their impact in the production of Vidalia onions in Georgia, USA, with the objective of determining an optimal fertilizer source and application rate. Field trials were conducted in the 2019–20 and 2020–21 growing seasons in Watkinsville, GA, USA (Cecil series sandy clay loam soil) and Tifton, GA, USA (Tifton series loamy sand soil) on certified organic land. There were significant interactions among location, year, and fertilizer application rate for total marketable yield. In Watkinsville, total marketable yields of onions at different N rates ranged between 1320 and 4565 lb/acre in 2019–20, and between 9951 and 28,749 lb/acre in 2020–21. In Tifton, total marketable yields ranged from 3776 to 9264 lb/acre and 7094 to 14,066 lb/acre in the 2019–20 and 2020–21 seasons, respectively. Aboveground onion N accumulation at harvest was affected by an interaction among location, study year, and fertilizer rate. The largest plant N accumulation was in Watkinsville in 2020–21, ranging from 26 to 50.8 lb/acre N in the 0- and 300-lb/acre N treatments, respectively. In 2020, there were no differences in soil inorganic N at harvest between plots receiving the MIX (9 lb/acre N) or PPL (9.8 lb/acre N) in either location. In 2021, soil inorganic N was greater in plots receiving the MIX fertilizer (14.8 lb/acre N) compared with the PPL fertilizer (11.2 lb/acre N). Yields increased linearly with additional fertilizer; therefore, an optimal application rate for organic fertilizers was not determined.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44189026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.21273/horttech05238-23
T. Shaddox, J. B. Unruh, Mark Johnson, C. D. Brown, G. Stacey
Golf facilities account for 2.3 million acres in the United States. Numerous turfgrass species are managed on US golf facilities, but golf facilities may change turfgrasses depending on numerous variables. Knowing which turfgrasses are grown and how turfgrass selection has changed would provide important information to scientists, turfgrass managers, and policymakers. The objective of this survey was to measure turfgrass use on US golf facilities in 2021 and to determine whether changes in turfgrass selection have occurred since 2005. A survey was developed and distributed via e-mail to 13,938 US golf facilities, with 1861 responding. From 2005 to 2021, the total projected area of maintained turfgrass on US golf facilities decreased by 14.2%, which was likely a result of course closures and maintenance operations. Nationally, bermudagrass (Cynodon sp.) and Kentucky bluegrass (Poa pratensis) remained the most common warm- and cool-season turfgrasses, respectively. The area of winter-overseeded turfgrass declined by 60% between 2005 and 2021. The percentage of golf facilities that used zoysiagrass (Zoysia sp.) and seashore paspalum (Paspalum vaginatum) increased depending on region and specific playing surface, albeit a pragmatically minor increase. In general, turfgrass selection on golf facilities in northern climates did not change, whereas turfgrass selection in southern climates favored a change from cool- to warm-season species, depending on the playing surface. Whether in historically cool-season or warm-season regions, it appears that many golf facilities are exploring alternatives to their traditional turfgrass species.
{"title":"Turfgrass Use on US Golf Courses","authors":"T. Shaddox, J. B. Unruh, Mark Johnson, C. D. Brown, G. Stacey","doi":"10.21273/horttech05238-23","DOIUrl":"https://doi.org/10.21273/horttech05238-23","url":null,"abstract":"Golf facilities account for 2.3 million acres in the United States. Numerous turfgrass species are managed on US golf facilities, but golf facilities may change turfgrasses depending on numerous variables. Knowing which turfgrasses are grown and how turfgrass selection has changed would provide important information to scientists, turfgrass managers, and policymakers. The objective of this survey was to measure turfgrass use on US golf facilities in 2021 and to determine whether changes in turfgrass selection have occurred since 2005. A survey was developed and distributed via e-mail to 13,938 US golf facilities, with 1861 responding. From 2005 to 2021, the total projected area of maintained turfgrass on US golf facilities decreased by 14.2%, which was likely a result of course closures and maintenance operations. Nationally, bermudagrass (Cynodon sp.) and Kentucky bluegrass (Poa pratensis) remained the most common warm- and cool-season turfgrasses, respectively. The area of winter-overseeded turfgrass declined by 60% between 2005 and 2021. The percentage of golf facilities that used zoysiagrass (Zoysia sp.) and seashore paspalum (Paspalum vaginatum) increased depending on region and specific playing surface, albeit a pragmatically minor increase. In general, turfgrass selection on golf facilities in northern climates did not change, whereas turfgrass selection in southern climates favored a change from cool- to warm-season species, depending on the playing surface. Whether in historically cool-season or warm-season regions, it appears that many golf facilities are exploring alternatives to their traditional turfgrass species.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49611100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.21273/horttech05231-23
S. Pethybridge, S. Murphy, J. Kikkert
New York, USA, is a regional hub for processing carrot (Daucus carota ssp. sativus) production and Nantes-type cultivars are preferred for slicing. Diameter is critical in carrots for slicing, with roots larger than 1 5/8 inch being rejected. The potential to manipulate carrot root diameter and hence suitability for slicing by foliar-applied gibberellic acid (GA3) was tested in four small plot replicated field trials over 3 years (2020, 2021, and 2022). In the most efficacious treatments, GA3 resulted in a 23.1% to 135.4% increase in foliar biomass at the expense of root weight and diameter. Increases in foliar biomass are beneficial to facilitate top-pulling harvest. Reductions in root diameter from GA3 ranged from 9.5% to 19.6%, and in 2020 and 2022, increased the proportion of roots suitable for slicing. GA3 did not significantly affect root length and number. In two 2021 trials, GA3 increased color intensity quantified by a colorimeter, but this change was not noticeable to the naked eye. The optimal number of GA3 applications was seasonally dependent, ranging from a single application at 107 to 108 days after planting (DAP) in 2021, to two applications at 74 + 92 DAP in 2022. Three GA3 applications per season or late applications (up to 14 days prior to harvest) were not beneficial.
{"title":"Growth Manipulation of Slicer Carrots by Foliar-applied Gibberellic Acid in New York","authors":"S. Pethybridge, S. Murphy, J. Kikkert","doi":"10.21273/horttech05231-23","DOIUrl":"https://doi.org/10.21273/horttech05231-23","url":null,"abstract":"New York, USA, is a regional hub for processing carrot (Daucus carota ssp. sativus) production and Nantes-type cultivars are preferred for slicing. Diameter is critical in carrots for slicing, with roots larger than 1 5/8 inch being rejected. The potential to manipulate carrot root diameter and hence suitability for slicing by foliar-applied gibberellic acid (GA3) was tested in four small plot replicated field trials over 3 years (2020, 2021, and 2022). In the most efficacious treatments, GA3 resulted in a 23.1% to 135.4% increase in foliar biomass at the expense of root weight and diameter. Increases in foliar biomass are beneficial to facilitate top-pulling harvest. Reductions in root diameter from GA3 ranged from 9.5% to 19.6%, and in 2020 and 2022, increased the proportion of roots suitable for slicing. GA3 did not significantly affect root length and number. In two 2021 trials, GA3 increased color intensity quantified by a colorimeter, but this change was not noticeable to the naked eye. The optimal number of GA3 applications was seasonally dependent, ranging from a single application at 107 to 108 days after planting (DAP) in 2021, to two applications at 74 + 92 DAP in 2022. Three GA3 applications per season or late applications (up to 14 days prior to harvest) were not beneficial.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47385446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.21273/horttech05213-23
Alejandra Sierra Augustinus, Patrick H. McLoughlin, A. F. Arevalo Alvarenga, J. B. Unruh, Marco Schiavon
Aerification and topdressing are important cultural management practices that help prevent organic matter accumulation and soil compaction in golf greens. However, these practices result in surface disruption and decreased putting quality during recovery. A 2-year study was conducted on a ‘TifEagle’ hybrid bermudagrass (Cynodon dactylon × C. transvaalensis) putting green to determine the effect of different aerification methods and topdressing materials on soil properties and turfgrass recovery. Plots were aerified four times per year (May to Aug.) using 1/2-inch hollow tines, 1/4-inch hollow needle tines, hollow tines 2X + hollow needle tines 2X, or sand injection, and topdressed with either 90:10 (sand:peat) or green-dyed sand. Visual quality, normalized difference vegetation index, percent green cover, dark green color index (DGCI), surface firmness and volumetric water content were measured before initial aerification and at 7 and 21 days after aerification. Saturated hydraulic conductivity (Ksat) and organic matter (OM) content were measured monthly. Aerification with hollow tines and hollow tines 2X + hollow needle tines 2X resulted in lower firmness and OM and higher Ksat compared with hollow needle tines and sand injection. Sand injection showed the highest percent green cover and similar OM content compared with hollow tines and hollow tines 2X + hollow needle tines 2X. Green-dyed sand showed a higher percent green cover and DGCI compared with 90:10 sand:peat. Using hollow tines only or alternating them with hollow needle tines is the best option to decrease OM content while increasing Ksat in hybrid bermudagrass greens; however, their use could result in slower turfgrass recovery compared with other aerification methods.
{"title":"Evaluation of Different Aerification Methods for Ultradwarf Hybrid Bermudagrass Putting Greens","authors":"Alejandra Sierra Augustinus, Patrick H. McLoughlin, A. F. Arevalo Alvarenga, J. B. Unruh, Marco Schiavon","doi":"10.21273/horttech05213-23","DOIUrl":"https://doi.org/10.21273/horttech05213-23","url":null,"abstract":"Aerification and topdressing are important cultural management practices that help prevent organic matter accumulation and soil compaction in golf greens. However, these practices result in surface disruption and decreased putting quality during recovery. A 2-year study was conducted on a ‘TifEagle’ hybrid bermudagrass (Cynodon dactylon × C. transvaalensis) putting green to determine the effect of different aerification methods and topdressing materials on soil properties and turfgrass recovery. Plots were aerified four times per year (May to Aug.) using 1/2-inch hollow tines, 1/4-inch hollow needle tines, hollow tines 2X + hollow needle tines 2X, or sand injection, and topdressed with either 90:10 (sand:peat) or green-dyed sand. Visual quality, normalized difference vegetation index, percent green cover, dark green color index (DGCI), surface firmness and volumetric water content were measured before initial aerification and at 7 and 21 days after aerification. Saturated hydraulic conductivity (Ksat) and organic matter (OM) content were measured monthly. Aerification with hollow tines and hollow tines 2X + hollow needle tines 2X resulted in lower firmness and OM and higher Ksat compared with hollow needle tines and sand injection. Sand injection showed the highest percent green cover and similar OM content compared with hollow tines and hollow tines 2X + hollow needle tines 2X. Green-dyed sand showed a higher percent green cover and DGCI compared with 90:10 sand:peat. Using hollow tines only or alternating them with hollow needle tines is the best option to decrease OM content while increasing Ksat in hybrid bermudagrass greens; however, their use could result in slower turfgrass recovery compared with other aerification methods.","PeriodicalId":13144,"journal":{"name":"Horttechnology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44818239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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