190 – 198 of 737 Results
31-2019 Evaluation of soybean breeding lines for resistance to Phomopsis seed decay and for high seed germinability final report
Phomopsis seed decay (PSD) of soybean is a major cause of poor seed quality in most soybean production areas, especially in the mid-southern region of the United States. Breeding for PSD-resistance is the most cost-effective long-term strategy to control this disease. In recent years, new sources of resistance to PSD have been identified (Li et al., 2011, 2015), and lines with high germinability have also been identified (Smith et al., 2008). Crosses were made between these new sources, resulting in the development of multiple heterogeneous breeding lines with the potential of having both high germinability and resistance to PSD. Seed quality assays, including seed plating for percentage of Phomopsis seed infection and standard germination tests were conducted following the harvest of plants selected for improved agronomic traits.
Principles of Efficient Agricultural Irrigation--Irrig. Assoc.
The Irrigation Association has published an article titled "Principles of Efficient Agricultural Irrigation" that covers the basics of crop irrigation.
20-2020 Bond Weed Management Programs in Mississippi Soybeans Annual Report
Glyphosate-resistant Palmer amaranth is the most troublesome weed in Mississippi soybean. Palmer amaranth competes for nutrients, water, light, and space because of its rapid, upright growth habit and allelopathic properties. Barnyardgrass is one of the more problematic weeds in U.S. soybean production. Recently, Mississippi and Tennessee became the first states to confirm GR barnyardgrass. Mixing herbicides representing different modes of action provides the potential for increased weed control and a reduction in application costs. However, some components of herbicide mixtures can synergize or antagonize others. It is important to identify effective programs for broad-spectrum weed control in these technologies. Recommendations for weed control in Mississippi soybean will originate from this research.
14-2020 Wilkerson Organism Affecting Seed Quality and Fungicide Efficacy Annual Report
Infection can be more severe when harvest is delayed and environmental conditions continue to be warm and humid during the growth stages that precede harvest (R7 and R8). As a means of reducing Phomopsis seed decay in subsequent seasons the current management strategies include crop rotation with non-hosts, tillage, fungicide applications during pod-fill, and resistant cultivars. However, information regarding efficacy of fungicide applications and cultivar resistance within the current commercial offerings is limited. The objectives of this research will improve soybean resistance to reduced grain quality by screening germplasm and developing new and improved breeding lines, and develop best management practices to address the soybean production issues associated with reduced grain quality.
13-2020 Gholson RISER Annual Report
Declining aquifer levels, coupled with impending well monitoring, serve as a catalyst to improve water use efficiency. The RISER program has identified several technologies and management practices that have the potential to eliminate the 300,000 ac-ft/yr overdraft on the Mississippi Alluvial Aquifer while ensuring that producers stay within permitted irrigation limits. However, the adoption of Best Management Practices (BMPs) by producers in the Mississippi Delta is minimal. The RISER (Row Crop Irrigation Science Extension and Research) Program can serve as the primary means to facilitate widespread adoption of the latest irrigation management research findings across the Mississippi Delta. The project aims to evaluate, demonstrate, and transfer innovative and proven technologies that can result in water conservation by conducting coordinated extension activities throughout the Mississippi Delta.
09-2020 Crow Determination of Residual Control of Commonly used Insecticides in Soybean and Cotton Annual Report
Due to increased costs of insecticides, particularly newer products, the most asked question by growers is length of control. This drives many decisions on product choice. For example, if product A is $10.00/Acre and provides 5 days of control, the grower is essentially spending $2.00/day for insect control compared to insecticide B that cost $15.00/Acre and provides 10 days of control. Product B is costing the grower $1.50/day for insect control and is a better investment. Most estimates of residual control with currently used insecticides are non-scientific best guesses and are generally wrong. This experiment will address true residual control (and examine systemic uptake) producers can expect in both soybean and cotton with commonly used insecticides targeting several key pests in each crop.
07-2020 Burdine Developing Future Agronomy Leaders
Agronomy is a diverse field of study in plant and soil sciences which include external factors such as: entomology, genetics, physiology, biology and chemistry. Recent trends in undergraduate enrollment show many students prefer to specialize in a specific science rather than a generalist discipline like agronomy. As the number of applied-science agronomists decreases, we face a shortage of individuals with the knowledge to perform field diagnostics, soil nutrient management, develop overall farm management plans or to conduct research. As the number of trained field agronomist declines, having access to people that can answer day-to-day questions could become a serious issue.
04-2020 High Mg Soils Impact on Soybeans Annual Report
RATIONALE/JUSTIFICATION FOR RESEARCH
06-2020 Ebelhar Stepwise by Omission Final Report
This research help growers for purple seed management, and scientists to further understand the potential negative impact on seed quality and nutrition. Further research is needed before conclusive recommendations are made.