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    Gardening
    Invasive species
    Food and food safety
    Ants, termites and other pests
    Pollinators
    Livestock
    Emergency preparedness
    Home safety and maintenance
    Health, family and finances
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    Turfgrass
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  • Expert Resources

    Expert Resources


    Gardening
    Invasive species
    Food and food safety
    Ants, termites and other pests
    Pollinators
    Livestock
    Emergency preparedness
    Home safety and maintenance
    Health, family and finances
    Nutrition
    Water quality
    Lawn maintenance and landscaping
    Turfgrass
    View all topics

    What is an Expert Resource?


    We publish unbiased, research-backed expert advice to empower Georgians with practical, trustworthy information they can trust.

    These resources are written and reviewed by experts in the UGA College of Agricultural and Environmental Sciences and the UGA College of Family and Consumer Sciences.

    Learn how we produce science you can trust
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  1. Home
  2. Expert Resources
  3. Expert Resources Topics
  4. Weeds, Diseases and Pests
  5. Commercial Weed Control

Commercial Weed Control

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  • Clover

    SB 28-14

    Clover

    Commercial insect and weed control in clover. Updated annually.

    Allison Johnson, Lisa Baxter, and Taylor Singleton

    |

    Feb. 20, 2025
  • Sunflower

    SB 28-30

    Sunflower

    Commercial insect and weed control in sunflowers. Updated annually.

    G. Buntin, Eric Prostko, and Allison Johnson

    |

    Feb. 20, 2025
  • Corn and Field Corn

    SB 28-15

    Corn and Field Corn

    Commercial insect and weed control in corn and field corn. Updated annually.

    G. Buntin, Eric Prostko, Robert Kemerait, and Allison Johnson

    |

    Feb. 20, 2025
  • Temporary Grazing (Summer and Winter)

    SB 28-31

    Temporary Grazing (Summer and Winter)

    Commercial insect and weed control in summer and winter temporary grazing. Updated annually.

    William Hudson, G. Buntin, and Allison Johnson

    |

    Feb. 20, 2025
  • B 1237

    Fertilizer Injectors: Selection, Maintenance and Calibration

    Fertilizer injectors are devices used to apply water-soluble fertilizers, pesticides, plant growth regulators, wetting agents and mineral acids during crop production. They are a vital part of modern greenhouse or nursery operations. Despite the advantages, many growers have had at least one experience with a compromised, damaged or even ruined crop where the cause was traced to a malfunctioning injector. Just like other mechanical devices, proper and frequent maintenance and calibration are crucial steps to ensure optimal injector performance and, thus, healthy crops.

    Svoboda Pennisi

    |

    April 9, 2024
  • C 1078

    Annual Ryegrass Control in Georgia Hayfields

    Annual ryegrass (Lolium multiflorum), also referred to as Italian ryegrass, is the most problematic winter annual weed in Georgia hayfields. Seed germinates from September to November when soil temperatures drop below 70 degrees F. Seedlings mature in the fall, overwinter in a vegetative state, and resume active growth in the spring. Annual ryegrass is a prolific seed producer that contributes to annual infestations.

    This publication summarizes the growth and identification of this weed. Cultural and chemical control options are also presented for tall fescue, bermudagrass, alfalfa, bahiagrass and other forage legumes grown for hay production.

    Patrick McCullough

    |

    April 4, 2024
  • AP 131-1

    2023 Southeast Regional Bunch Grape Integrated Management Guide

    This is a new annual guide for managing diseases, insects, weeds, and wildlife in bunch grapes in the Southeast. This regional integrated pest management guide provides recommendations based on information from the manufacturer’s label and performance data from research and Extension field tests. This publication is intended for use only as a guide. Specific rates and application methods are on the pesticide label, and these are subject to change at any time.

    Phillip Brannen

    |

    June 22, 2023
  • AP 125-3

    2023 Southeast Regional Organic Blueberry Pest Management Guide

    This publication provides updated (2023) Southeast-specific information on approved National Organic Program (NOP) disease and pest management options for blueberry production and addresses the issues most commonly encountered under the unique growing conditions of the Southeast U.S. This publication is not intended to provide all details on organic blueberry production, although it does include the production methods that reduce the impact of plant disease and pest issues. Emphasis in an organic system should be on cultural practices that reduce disease and pest pressure rather than pesticide applications. NOP-approved pesticides are usually less efficacious than conventional products. The pesticide label is the law and supersedes any information on pesticide use contained in this guide. Because environmental conditions and grower application methods vary widely, suggested use does not imply that performance of the pesticide will always conform to the pest control standards indicated by experimental data.

    Elizabeth Little and Phillip Brannen

    |

    April 24, 2023
  • C 1277

    Pulse Width Modulation Technology for Agricultural Sprayers

    This publication provides information on pulse width modulation (PWM) technology including its working principle, components, benefits, and best management practices for its optimal utilization on agricultural sprayers. Agricultural sprayers are commonly used for pesticide applications and come in various design types and sizes, including three-point hitch, pull-behind, and self-propelled. During pesticide applications, maintaining a target application rate across the whole field is important for effective pest management. On sprayers with traditional flow-based control systems, the liquid flow rate is regulated to account for ground speed variations by adjusting the spray pressure. However, this becomes an issue when spray pressure reaches outside the narrow operating range of the selected nozzle and results in non-uniform droplet size and pattern. Higher spray pressures at faster travel speeds produce finer droplets which are more prone to spray drift; applications at lower pressures produce coarser spray droplets and reduce spray fan angle. Pulse width modulation technology was developed to overcome this pressure variation issue; pulse width modulation does not rely on spray pressure to regulate system flow rate with changes in ground speed. In pulse width modulation systems, the flow rate is varied by changing the intermittent cycling of the electronically actuated solenoid valves while the system pressure remains constant throughout the boom.

    Simerjeet Virk

    |

    Dec. 20, 2022
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