Commercial Weed Control
-
This publication discusses the proper calibration methods sprayers and other liquid applicators.
|
-
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.
|
-
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 new growth in spring. The persistence of Johnsongrass is primarily associated with extensive rhizomatous growth that enable populations to spread laterally and dominate areas by preventing desirable species from flourishing.
|
-
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, thereby reducing profits. Managing wild radish is not difficult if timely management decisions are implemented.
This publication provides commercial wheat producers with herbicide options and critical thinking points on controlling ryegrass and wild radish.
|
-
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 it can potentially influence final peanut yield.
|
-
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 effectively achieved by preventative practices, primarily with the use of pre-emergent herbicides. However, there are valid reasons for managing weeds using alternatives to synthetic herbicides. Weed management alternatives to synthetic herbicides include sanitation, exclusion, prevention, hand weeding, mulching and use of cover crops, heat and non-synthetic herbicides. Only some of these alternative methods can be used to control weeds in containers, but all can be used to manage weeds around containers and in non-crop
areas.|
-
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 applications.
|
-
This publication provides growers, county agents, crop consultants, etc. with information regarding peanut yield response to 2,4-D injury.
|
-
C 1025
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 such as peanut. This publication describes symptoms of peanuts exposed to Liberty.
|