Commercial Weed Control
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Hophornbeam copperleaf has become an increasing problem in agricultural fields throughout Georgia. It can occur at densities that have the potential to reduce yields and influence harvest efficiency. Hophornbeam copperleaf is also known as three-seeded mercury.
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Eclipta is considered to be one of the world’s worst weeds. This publication discusses the identification and control of eclipta in peanut.
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This publication discusses tropic croton identification and control in cotton and peanut.
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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.
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This publication discusses the proper calibration methods sprayers and other liquid applicators.
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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.
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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.
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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.
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This publication provides growers, county agents, crop consultants, etc. with information regarding peanut yield response to 2,4-D injury.
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