20 publications were found
on Commercial Weed Control
Alternatives to Synthetic Herbicides for Weed Management in Container Nurseries
Weed management is one of the most critical and costly aspects for container nursery production. High irrigation and fertilization rates create a favorable environment for weed growth in addition to crop growth. Weeds can quickly out-compete the crop for light and other resources, reducing the rate and amount of crop growth as well as salability. Weed management in nursery production is most effec…
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 …
Calibration Method for Sprayers and Other Liquid Applicators
This publication discusses the proper calibration methods sprayers and other liquid applicators.
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 i…
Granular Applicator Calibration Procedure
Applicators used in granular applications should be calibrated to ensure uniformity and accuracy. An accurate and uniform application can reduce the quantity of an active ingredient required for a given degree of control.
How to Set Up a Post-Emergence Directed and Shielded Herbicide Sprayer for Cotton
Even with today's technology, it is critical that growers use directed herbicides in their cotton crop to improve coverage of weeds hiding under the cotton canopy. Precision applications maximizing spray coverage of weeds and minimizing spray contact with cotton, which can cause injury, is critical. Spray fender/cultivator and shield/hood sprayers are commonly used for precision, directed-spray ap…
Johnsongrass Control in Pastures, Roadsides, and Noncropland Areas
Johnsongrass (Sorghum halepense) is a warm-season perennial weed in pastures and roadsides throughout central and northern Georgia. Populations may germinate from seed in spring after overwintering in the soil. However, Johnsongrass primarily emerges from dormant rhizomes in areas with a history of infestations. Rhizomes are belowground stems that produce daughter plants and storage reserves for n…
Peanut Response to Dicamba
The objective of this publication is to provide county agents, peanut growers, crop consultants, agri-business personnel, etc. with information that can assist them in making appropriate management decisions after a suspected dicamba drift/volatilization or sprayer contamination problem has occurred.
Peanut Response to Grazon® P+D
Grazon® P+D (picloram + 2,4-D) injury, diagnosed as leaf roll, is occasionally observed in Georgia peanut fields due to the presence of contaminated soil, forage, animal waste (manure/urine), and/or irrigation water. Since peanut plants are very tolerant of low levels of 2,4-D, the primary cause of these leaf roll symptoms is picloram. When this injury occurs, growers are often concerned about how…
Peanut Response to Liberty
Liberty® (glufosinate-ammonium) has become a popular postemergence herbicide in Georgia due to its ability to control herbicide-resistant Palmer amaranth when applied in a timely manner. However, the popularity of Liberty®-resistant cultivars (e.g., Liberty-Link® and WideStrike®) has led to an increased potential for off-target movement and sprayer contamination of Liberty® to sensitive crops suc…
Peanut Yield Response to 2,4-D in Georgia
This publication provides growers, county agents, crop consultants, etc. with information regarding peanut yield response to 2,4-D injury.
Spanish Series: Enfermedad “Mal del Pie” en Céspedes de Clima Cálido: Identificación y Control
El mal del pie es una enfermedad destrcutiva en la region central, sur y costera de Georgia. EL mal del pie afecta todos los cespedes de clima calido en Georgia pero es mas severo en el cesped San Agustin (Stenotaphrum secundatum). La publicacion contiene informacion importante en la biologia del gente causal, descripcion detallada de los sintomas de la enfermedad (con fotografias de alta definici…
Sprayer Nozzle Selection
Nozzle selection is one of the most important decisions to be made related to pesticide applications. The type of nozzle affects not only the amount of spray applied to a particular area, but also the uniformity of the applied spray, the coverage obtained on the sprayed surfaces, and the amount of drift that can occur. Each nozzle type has specific characteristics and capabilities and is designed …
UGA Programs for Controlling Glyphosate-Resistant Palmer Amaranth in 2019 Cotton
Cotton weed control has become dynamic and complex with the greatest challenges being 1) mitigating off-target herbicide movement, and 2) minimizing the development of more herbicide resistance. This circular is designed to assist with improved economically-sound management programs, minimize cotton injury, and make on-target pesticide applications.
UGA Programs for Controlling Ryegrass and Wild Radish in 2020-21 Wheat
Ryegrass threatens Georgia wheat production as herbicide resistance has become very problematic. Aggressive resistant management programs must be implemented; ignoring this warning will ensure resistance that threatens long-term sustainability of grain production.
Wild radish is the most problematic broadleaf weed infesting Georgia wheat. Wild radish seed pods often contaminate harvested grain, t…
UGA Weed Control Programs for Broccoli, Cabbage, and Cauliflower 2017
When it comes to growing commercial broccoli, cabbage, and cauliflower, crop rotation, tillage, and a sound herbicide program are all often critical components for long-term success. This circular focuses on developing sound herbicide programs for cole crops while minimizing crop injury for the following production systems: 1) transplanting into mulch, 2) transplanting into bare ground, and 3) see…
UGA Weed Control Programs for Sweet Potato in 2018
Crop rotation, tillage, and a sound herbicide program are all critical components for long-term success growing sweet potatoes. This circular focuses on developing sound herbicide programs while minimizing crop injury for transplant production systems. A new indemnified label for Dual Magnum has greatly improved weed control options, and growers must have these labels in hand at the time of applic…
UGA Weed Control Programs for Watermelon in 2017
When it comes to growing commercial watermelons, crop rotation, tillage, and a sound herbicide program are all often critical components for long-term success. This circular focuses on developing sound herbicide programs while minimizing crop injury when 1) transplanting into small-bed flat mulch, 2) transplanting into bareground, and 3) seeding into bareground. Large raised-bed mulch production i…
University of Georgia Herbicide Programs for Tropical Spiderwort (Benghal Dayflower) Control in 2013 Cotton
Tropical spiderwort is a noxious, exotic, invasive weed that has spread quickly and has become a serious pest in many Georgia agricultural production areas. The increase in prevalence of tropical spiderwort may be attributed in part to (1) adoption of weed management programs that lack residual herbicides and (2) adoption of reduced-tillage production systems.
Vegetable Fumigant Systems for Plasticulture in Georgia
Effective alternatives to methyl bromide exist, but selecting the ideal fumigant, mulch, and herbicide program is challenging. Growers must better understand how soil texture, moisture, bed compaction, and cultural practices influence fumigant activity, planting intervals, and off-gassing concerns. This circular is provided to assist growers with developing the most effective fumigant system for t…