- Characterizing atrazine, mesosulfuron-methyl, and topramezone bioavailability in North Carolina soils using greenhouse bioassays , AGROSYSTEMS GEOSCIENCES & ENVIRONMENT (2023)
- Dose-response of five weed species to indaziflam and oxadiazon , WEED TECHNOLOGY (2023)
- In Vitro Fungicide Sensitivity and Effect of Organic Matter Concentration on Fungicide Bioavailability in Take-All Root Rot Pathogens Isolated from North Carolina , PLANT HEALTH PROGRESS (2023)
- Subsurface Lateral Solute Transport in Turfgrass , AGRONOMY-BASEL (2023)
- Survey of target site resistance alleles conferring resistance in Poa annua , CROP SCIENCE (2023)
- Atrazine, mesosulfuron-methyl, and topramezone persistence in North Carolina soils , AGRONOMY JOURNAL (2022)
- Characterization and Aggressiveness of Take-All Root Rot Pathogens Isolated from Symptomatic Bermudagrass Putting Greens , PHYTOPATHOLOGY (2022)
- Evaluation of imazapic and flumioxazin carryover risk for Carinata (Brassica carinata) establishment , WEED SCIENCE (2022)
- Harvest frequency and harvest timing following a freeze event effects on yield and composition of switchgrass , AGRONOMY JOURNAL (2022)
- Herbicide-Resistance in Turf Systems: Insights and Options for Managing Complexity , SUSTAINABILITY (2022)
This 10-week summer program will train six students per year for five years on the topic of agricultural runoff pollution through research and extension experiences. The program long-term goal is to prepare the upcoming generation of agro-environmental engineers and scientists, extension specialists, practitioners and industry leaders to address this issue by providing them with an holistic perspective of the science and practice. Students will engage in various experiential learning activities including training workshops, seminars, field visits, research and an â€˜extension abroadâ€™ experience in France.
This research will allow for a greater understanding of factors affecting preemergent herbicide and nematicide degradation in turfgrass areas. Understanding how previous application history, as well as how edaphic factors affect residual pesticide persistence will generate information that may be used to develop best management practices that can be communicated to turfgrass managers to help maximize efficacy. This may include rotating pesticide mode of action or adjusting application rates and timings to optimize efficacy. For example, even though oxadiazon is only absorbed by emerging shoots, it may be beneficial to make a timely split application as opposed to applying the maximum labeled rate initially. This is likely also true for fluopyram given that two split applications perform better than a single application of a high rate. Understanding degradation rates and how they are affected by previous application history and edaphic factors may also influence recommendations and management strategies. In general, data generated from this research will help us gain insight and determine strategies to ensure optimal efficacy is obtained with residual pesticides. Results will be disseminated to turfgrass managers through NCSU TurfFiles, extension outreach, conferences, as well as added to the scientific literature by publishing this experiment along with its results and recommendations.
North Carolina Department of Transportation (NC DOT) utilize herbicides as a component of Integrated Roadside Vegetation Management to ensure safe travel routes for motorists and preserve road system infrastructure. While herbicides are an effective tool, optimizing applications to maximize target efficacy and minimize off-target damage are necessary.
Known popularly as the ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“Green IndustryÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢ or the ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“Environmental Horticulture IndustryÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢, turf is a $90 billion per year specialty crop industry in the US with about 50 million acres of managed turf operations in the country (USDA-ERS), making turfgrass the most widely grown irrigated crop in the US (Milesi et al. 2005). Golf courses, sports fields, home lawns, and sod production operations are the four major sectors of the US turf industry. There are more than 17,000 golf courses, 775,000 athletic/sports turf fields, 60 million home lawns, and 321,000 acres of sod production fields in the US, contributing greatly to local economies and generating employment to tens of thousands of professionals (Richard et al. 1996). Weed management constitutes a major input to turfgrass production in the US and is typically achieved using multiple herbicide applications throughout the year, costing enormous time and money. In recent times, weed resistance to herbicides is a serious management issue throughout the US turf industry, with annual bluegrass (Poa annua L.) being the most important and prevalent resistance prone weed species on a national scale (Heap 2016). The inability to control annual bluegrass and other problematic weeds using existing, economical and environmentally benign herbicides means that expensive and environmentally less benign herbicides need to be used to manage the problem. Multiple herbicide resistance to more than one herbicide is a particularly emerging concern, forcing increased herbicide use and lost profitability. The most recent report produced by the Golf Course Superintendents Association of America (GCSAA) and the Environmental Institute for Golf (EIFG) revealed that herbicide use has increased in golf course fairways, and a similar trend could be noticed in other managed turf systems as well. Increased herbicide use is not desirable also because of potential exposure to human beings and off-target movement. Thus, herbicide resistance in turfgrass weeds is a critical economic, environmental and social issue that needs immediate attention. This project primarily focuses on annual bluegrass resistance management, yet the research and outreach efforts will directly benefit resistance management in any problematic weed in turfgrass systems.
This research will allow for a greater understanding of factors affecting preemergent herbicide degradation in treated turfgrass areas. Understanding how previous application history, as well as how edaphic factors affect prodiamine and oxadiazon persistence will generate information that may be used to develop best management practices that can be communicated to turfgrass managers to help maximize efficacy. This may include rotating herbicide modes of action or aligning pre-emergent application with weed emergence more accurately to achieve optimum control. Even though oxadiazon is only absorbed by emerging shoots, there may be viable benefits from making a timely split application as opposed to applying the maximum labeled rate initially. Likewise, weed emergence data will be collected to help optimize herbicide applications with respect to maintaining critical concentrations during major periods of emergence for products such as prodiamine and oxadiazon. Understanding degradation rates depending on soil texture may also influence recommendations and management strategies. In general, data generated from this study will help us gain insight and determine strategies to ensure oxadiazon, prodiamine, and other related preemergent herbicides offer optimized efficacy. Results will be disseminated to turfgrass managers through NCSU TurfFiles, extension outreach, conferences, as well as added to the scientific literature by publishing this experiment along with its results and recommendations.
Investigator will direct establishment and conduct of trial described in protocol. Investigator will direct collection and reporting of data as outlined in protocol and handle any disposition of trial materials necessary. Aim of testing is to characterize the effect of metcamifen (A18575F) on trifloxysulfuron absorption, translocation, and metabolism in yellow nutsedge (Cyperus esculentus) and St. Augustinegrass (Stenotaphrum secundatum).
Through North Carolina (NC) Cooperative Extension programs and diverse cross-disciplinary team collaboration, we work to sustain and enhance environmental stewardship, reduce economic risks for growers and consumers, and protect human health by applying integrated pest management (IPM) in all appropriate settings, and to increase coordination and improve efficiency of translating IPM research through extension programming. By working to synergize efforts and leverage resources, we are better able to promote development and adoption of IPM through collaborative programs and broad-based stakeholder participation. With a strong team of experts and close association with our Evaluation Specialist, we are able to document the value of IPM strategies and programs, and demonstrate to our stakeholders that IPM works. Through the outputs and outcomes from this program, NC Extension agents and stakeholders will become more knowledgeable about IPM and develop the skills necessary to implement IPM strategies and build adoption of IPM in Agronomic Crops, Specialty Crops, Communities, and Pollinator Health. To accomplish our goals and address stakeholder needs for the 2017 CPPM-EIP program, we have 3 main objectives which we will tackle as specific program teams. These include 1) To develop and employ Extension Agent Trainings/In-Services to help agents to be effective communicators of IPM tactics, to build confidence in their knowledge of IPM strategies, and to foster high levels of trust and credibility in their local communities in Agronomic crops, Specialty crops, Communities, and/or Aquatic environments; 2) Deliver IPM Information to stakeholders in a variety of North Carolina settings so that through these activities, NC Extension agents and stakeholders will become more knowledgeable about IPM and develop skill sets to be able to implement sound IPM practices; and 3) Offer tools that will improve Pest Monitoring and Pest Forecasting protocols for pests of importance to NC Agronomic and Specialty Crops and enable enhanced searching and output features on the IPM Portal.
Vegetation management along NC roadsides must encompass comprehensive management programs in a fiscally responsible manner ensuring motorist and transportation worker safety. Synthetic pesticides are an integral component of roadside vegetation management; however, managers must utilize effective vegetation management programs without adversely affecting adjacent plants or vegetation including agricultural crops as well as environmental and human health. An assessment of existing practices as well as evaluation of new instrumentation and technology, which may assist field personnel to avoid adverse scenarios, is needed. Specifically, the proposed research will assess current vegetation management programs and practices and their effect on air and water quality, identify best management practices to minimize potential off-target movement, and devise training material for NC DOT field personnel to understand how to prevent and identify off-target movement.
Turfgrass managers must manage pests effectively without adversely affecting human or environmental health. Herbicides are part of comprehensive pest management programs but must be comprised of products and use patterns that do not adversely affect desirable species as well as species of ecological importance. The objectives of this research aim to: 1) Determine the effect of volumetric water and organic matter content on off-target injury from herbicide applications; and 2) Devise best management practices to minimize off-target injury from herbicide applications.
We propose to investigate the amount of fungicide in clippings from golf course putting greens and fairways after applications targeting take-all root rot, Pythium root rot and dollar spot. These diseases are problematic for almost all members of the Carolinas and investigating tactics to improve fungicide efficacy targeting these diseases is warranted. We also plan to examine if altering mowing schedules for various periods of time after fungicide applications improves disease control. Finally, we propose to determine the effective concentrations required to keep the diseases mentioned above suppressed and relate that to the concentrations needed to suppress fungal growth in culture.