Jason A. Ferrell's research while affiliated with University of Florida and other places
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Publications (206)
Salinization is a great threat to wetlands and freshwater ecosystems. Increased salinity can disturb native aquatic vegetation and provide an empty niche for invasion of non-native species. To understand the fate of aquatic flora under increased salinity levels, 14 dominant wetland species with different growth forms (submersed, amphibious, floatin...
This publication provides information on weed control options in sorghum. Written by J. A. Ferrell, G. E. MacDonald, B. J. Brecke, and P. Devkota, and published by the UF/IFAS Agronomy Department, revised January 2022.
Organo-auxin (phenoxy) herbicides have found a place in weed control schemes for peanut, corn, small grains, sugarcane, turf, pasture and forage crops, and many other areas. It is the intent of this publication to clarify and disseminate the Florida Organo-Auxin Herbicide Rule to interested growers and applicators. Major revision by B. Bultemeier,...
This publication discusses chemical control of bracken fern in pastures. Written by B. Sellers, J. Ferrell, and T. Wilson, and published by the UF/IFAS Agronomy Department, revised August 2021.
This publication details techniques for chemical weed control prior to and during pasture establishment and is intended for county Extension faculty as well as owners and managers of grazing lands. Written by Brent Sellers, Pratap Devkota, Joao Vendramini, and Marcelo Wallau, and published by the UF/IFAS Agronomy Department, revised August 2021.
This publication provides an overview of the impact of biochar use as a soil amendment on weed management. Written by Neeta Soni, Jason A. Ferrell, Pratap Devkota, and Michael J. Mulvaney, and published by the UF/IFAS Agronomy Department, revised May 2021.
This publication provides county Extension agents, growers, and pesticide applicators with information on hairy indigo control options in peanut. Written by Jason Ferrell, Blaire Colvin, and Pratap Devkota, and published by the UF/IFAS Agronomy Department, revised May 2021.
Sesame is a relatively new grain crop being grown in Florida. This publication discusses rotational considerations and herbicides for use in sesame. Written by Jason Ferrell and Pratap Devkota, and published by the UF/IFAS Agronomy Department, revised April 2021.
Ethiopian mustard ( Brassica carinata A. Braun) is a biofuel crop that was recently introduced in the southeastern United States. In order for this crop to be successful, there is a need to develop integrated weed management strategies that complement its rotation with summer cash crops. The objectives of this research were to evaluate the effect o...
Mesocosm studies were conducted in 2020 to evaluate the effects of carrier volume and application method on waterhyacinth response to 2,4-D, glyphosate, and diquat. Carrier volumes of 935, 467, and 187 L ha ⁻¹ were applied using either a conventional stream, conventional cone, adjustable cone, or a drizzle stream spray pattern. Reducing carrier vol...
Brassica carinata A. Braun is a non‐edible, oilseed winter crop for biofuel production that can diversify crop rotations and improve integrated weed management. The research objective was to evaluate the influence of B. carinata on weed population dynamics in the southeastern United States cropping systems. Brassica carinata was grown after cotton...
Successful weed control in small grains involves using good management practices in all phases of production. In Florida, winter weeds compete with small grains for moisture, nutrients, and light, with the greatest amount of competition occurring during the first six to eight weeks after planting. Weeds also cause harvest problems the following spr...
This 4-page publication provides information on herbicides that can be applied for weed control in clover production systems. Written by J. A. Ferrell, B. A. Sellers, and P. Devkota, and published by the UF/IFAS Agronomy Department, revised June 2020.
This 3-page publication discusses the following considerations regarding the use of dicamba in dicamba-tolerant crops: dicamba product selection, tank-mix products, buffer requirements, nozzle selection, boom height, wind speed, and ground speed. Written by J. A. Ferrell and P. Devkota, and published by the UF/IFAS Agronomy Department, revised June...
Blackberry and dewberry are often viewed simply as nuisance weeds that reduce grazing in a portion of the field. This may not seem that detrimental. However, severe financial losses can occur if cattle are injured by these growing thickets. For example, a bull's reproductive organs can be severely damaged by blackberry or dewberry thorns. Lesions o...
Prickly pear cactus is not a problem in every pasture in Florida, but where it is found, it is often the biggest and most difficult issue to manage. Written by Brent Sellers, Pratap Devkota, and J. Ferrell, and published by the UF/IFAS Agronomy Department, revised July 2020. Previous version: Ferrell, Jason, and Brent Sellers. 2011. “Prickly Pear C...
Rhizoma perennial peanut (RPP) is well adapted to the Gulf Coast region of the U.S., but its varietal tolerance to glyphosate and triclopyr is not well defined. The research was conducted to determine the effect of various rates of glyphosate and triclopyr on established RPP, and the response of common RPP varieties to these herbicides. The RPP swa...
Wild radish is one of the most common and problematic pasture weeds in the Florida Panhandle. It is found throughout the state and can be a serious pest in other crops including peanut, corn, and winter vegetables. This publication provides information concerning the biology and growth of wild radish, the problems associated with its presence in wh...
Interest around pesticides and possible alternatives to them have increased in recent years. As individuals seek out possible alternatives, some consider making their own solutions to pest control. Homemade pesticide recipes abound online and are commonly seen in various social media platforms. This new 3-page publication of the UF/IFAS Pesticide I...
Some manure-based products can contain herbicide residues that can affect the growth of sensitive plants. A simple plant bioassay can be conducted to test for herbicide contamination. Written by J. A. Ferrell, P. J. Dittmar, B. A. Sellers, and P. Devkota, and published by the UF/IFAS Agronomy Department, revised May 2020.
Pintoi peanut is a warm-season perennial legume that shows promise as a forage crop for the southeastern United States, however, little is known about the proper methods of weed management during establishment for this species. The objective of this study was to determine the ability of pintoi peanut to tolerate applications of PRE and POST herbici...
If pesticide applicator equipment is not properly calibrated, the pesticide will probably be applied below or above the desired application rate. This 3-page document discusses the two most common methods for sprayer calibration. Written by Jason A. Ferrell, Brent A. Sellers, and Pratap Devkota, and published by the UF/IFAS Agronomy Department, rev...
Successful weed control is essential for economical corn production in Florida. Weeds reduce corn yields by competing for moisture, nutrients, and light during the growing season and interfere with harvest. Producing a good corn crop is only half the battle and will not be profitable unless the corn can be harvested. Late-season weeds can result in...
Fireweed (Urtica chamaedryoides) (Figure 1) is native to Florida, but has only recently become problematic. This winter annual species is commonly observed in north and central Florida pastures, particularly in bareground areas (near feeding pens and under fences), as well as along tree lines where forage grasses are less dense. This 2-page fact sh...
The pyridine carboxylic acid (PCA) herbicide family can exhibit differential activity within and among plant species, despite molecular resemblances. Aminocyclopyrachlor (AMCP), a pyrimidine carboxylic acid, is a recently discovered compound with similar use patterns to the PCA’s; however, relative activity among PCA’s and AMCP is not well understo...
If left uncontrolled, thick thistle stands can reduce grazing, result in less forage production, and ultimately, lower calf weaning weight. A single thistle plant can produce at least 4,000 seeds, increasing the chance for higher thistle populations in the pasture the following year. Consequently, management practices need to be conducted prior to...
Dissipation of S -metolachlor, a soil-applied herbicide, on organic and mineral soils used for sugarcane production in Florida was evaluated using field studies in 2013 to 2016. S -metolachlor was applied PRE at 2,270 g ha ⁻¹ on organic and mineral soils with 75 and 1.6% organic matter, respectively. The rate of dissipation of S -metolachlor was ra...
Bahiagrass is the most common forage grown in Florida, covering approximately 2.5 million acres. The popularity of bahiagrass in Florida can be attributed to its drought tolerance, low fertility requirements, and persistence even under heavy grazing. Although bahiagrass is an important forage species, it can be a serious weed problem for those wish...
There are numerous Rubus (blackberry and dewberry) species in the Southeastern U.S., many of which are found in Florida. Blackberry is commonly found in fence rows, ditch banks, and pastures and can be overlooked for extended periods of time. However, lack of management can give rise to thickets that are difficult to control. This document is SS-AG...
Herbicide performance is a complex issue that is influenced by many factors. These include spray coverage, application method, herbicide rate, environmental conditions, and weed size, to name a few. Poor or incomplete control may also be due to the ability of a weed to tolerate a particular herbicide. Herbicide tolerance is the inherent ability of...
The progression of trees and other woody plants into pastures, fencerows, ditch banks, rights-of-way and other areas is a common occurrence. These woody species can be particularly troublesome and require control since they will compromise fence intregrity, impede canal drainage, interfere with transmission of electricity, and some species (such as...
Sugarcane growers in Florida have been reporting reduced control of fall panicum with asulam, the main herbicide used for POST grass control. Therefore, outside container experiments were conducted to determine the response of four fall panicum populations from Florida to asulam applied alone and to evaluate whether tank-mix combination with triflo...
Nitrogen fertilization is an important management practice in
bahiagrass (Paspalum notatum Fluegg) pastures; however, the use
of N has been limited in forage-based livestock systems in Florida.
Dogfennel [Eupatorium capillifolium (Lam.) Small] is currently
the most common broadleaf weed in bahiagrass pastures. We
hypothesize that limited N fertiliz...
While natural areas are conservation lands that have been set aside for the purpose of preserving (or restoring) native plant and animal communities, they do require active management. One of the greatest management issues in natural areas is invasive plants. This 35-page publication provides land managers in Florida with current methods used to ma...
Strawberries are an important horticultural crop in Florida. Black medic is among the most problematic weeds within the production system. To better coordinate control measures, black medic growth and development while in competition with strawberry was studied. Twelve plants were randomly selected at each of four field sites in Hillsborough County...
Palmer amaranth control has become a major challenge for multiple cropping systems across the southeastern and midwestern United States. Despite extensive research on herbicide-resistance evolution, little research has been done exploring how Palmer amaranth might also be evolving other adaptive traits in response to different selection forces pres...
Cogongrass is commonly found in disturbed areas in Florida, where it is increasingly becoming a problem in bahiagrass pastures. Soil pH has been suggested as a possible mechanism for this invasion; to evaluate this, replacement series competition studies were conducted under greenhouse conditions at two soil pH levels: pH 4.5, or pH 6.8. Cogongrass...
Strawberries, an important Florida crop, are grown on raised beds covered with plastic mulch. The plastic mulch provides good control of many weeds, but some problem species can emerge from the transplant hole during crop establishment. POST herbicide options for broadleaf weed control within the strawberry bed is limited to clopyralid, which only...
Integrating bahiagrass (Paspalum notatum Flueggé) into peanut (Arachis hypogaea L.) production systems can improve soil structure, and increase peanut yield. A study was conducted in 2012 and 2013 in north Florida to evaluate practices for planting peanut into bahiagrass with three tillage methods i.e.; strip till (ST), ST and high residue cultivat...
The indeterminate nature and underground fruiting habit of peanut (Arachis hypogaea L.) makes it a challenge to determine the optimal harvest time. The objectives of this study were (1) to gain additional information about how maturity and canopy health influence peg strength, yield, and grade and (2) to address anecdotal claims of differences in p...
Triclopyr is a synthetic auxin herbicide currently available as a triethylamine salt, butoxyethyl ester, pyridinyloxyacetic acid, or choline salt. The formulation of a herbicide has the potential to impact its activity; therefore, the objective of this study was to determine the relative activity of these four triclopyr formulations. Greenhouse dos...
Carinata is a new biofuel crop that was recently introduced in the southeastern USA as a winter crop. This crop is competitive after canopy closure, but there is a need for weed control options at earlier growth stages. Field experiments were conducted from 2014 to 2016 to determine the safety of several PRE and POST herbicides in carinata. Pendime...
Field trials were conducted in 2013 and 2014 to investigate the tolerance of limpograss to increasing rates of hexazinone. Dose-response curves were generated using linear and quadratic regression models to determine the hexazinone estimated dose (ED) required to provide 10% (ED 10 ) and 20% (ED 20 ) of visual injury and herbage mass reduction. The...
Two separate experiments were conducted in 2015 and 2016 in Citra, FL to investigate the effects of preplant application timing of 2,4-D and dicamba on sesame stand and yield. Nonlinear regression analysis was performed to determine the application timing that caused 10% stand or yield reduction (GR 10 ) compared to the nontreated control (NTC) and...
When purchasing compost, it is important to understand that some manure-based products can contain herbicide residues that can affect the growth of certain plants. Manure from animals that have been fed forage treated with aminopyralid or other closely related herbicides, such as clopyralid or picloram, can be contaminated with these herbicides, wh...
Palmer amaranth’s ability to evolve resistance to different herbicides has been studied extensively, but there is little information about how this weed species might be evolving other life-history traits that could potentially make it more aggressive and difficult to control. We characterized growth and morphological variation among 10 Palmer amar...
Weeds in pastures and rangeland cost ranchers in excess of $180 million annually in Florida by reducing forage yield, lowering forage quality, and causing animal injury through toxicity or specialized plant organs (thorns and spines). Effective weed management begins with a healthy pasture. Weeds are seldom a serious problem in a well-managed, vigo...
Black medic (Medicago lupulina L.) is a troublesome weed in Florida strawberries. It emerges from the planting hole post-transplant to compete with the crop and impede harvest. Clopyralid is the only available postemergence broadleaf control option available and strawberry producers report only suppression. Two radiolabeled clopyralid experiments w...
Two experiments were conducted in 2013 and 2014 in Florida to evaluate the effects of protoporphyrinogen oxidase (PPO)-inhibiting herbicides and single versus sequential applications on Palmer amaranth control and peanut injury. Protoporphyrinogen oxidase-inhibiting herbicides are among the last available herbicides for the POST control of acetolac...
Rotala is an invasive aquatic plant that was introduced to the United States through the aquarium and water garden industries. The species has become a significant weed problem in southern Florida and is particularly troublesome in flood-control canals, where its dense growth impedes water movement. Previous research revealed that the organo-auxin...
Core Ideas
Limpograss tolerance to herbicides is not affected by regrowth height or fertilizer timing.
Limpograss tolerance to herbicides is affected by time of year of application.
Although some injury and herbage mass reduction exists, the number of herbicides to control dogfennel in limpograss could increase.
Weed management in limpograss ( Hem...
Two experiments were conducted in 2015 at multiple locations in Florida to evaluate the effects of planting depth and application timing on S-metolachlor injury in sesame. In both studies, sesame responded negatively to increases in S-metolachlor rate. Altering sesame planting depth did not provide increased safety to PRE S-metolachlor applications...
Weeds exploit underutilized space, causing economic losses in cropping systems. Weed management tactics alter that underutilized space until the crop can mature and efficiently use that space. One tactic is to reduce the weed propagules (e.g., seeds and tubers) that persist quiescently in the soil, which includes minimizing production and addition...
Two varieties of bahiagrass were evaluated under Florida conditions for forage tolerance to the new herbicide, aminocyclopyrachlor (ACP), which is essential for product development decisions. Herbicide treatments included ACP alone at 70 and 140 g ai ha⁻¹, ACP + chlorsulfuron at 69 + 27 and 138 + 54 g ai ha⁻¹, ACP + 2,4-D amine at 70 + 532 g ai ha⁻...
The importance of PRE herbicide applications in cotton has increased since the evolution of glyphosate-resistant (GR) Palmer amaranth. Cotton producers are relying on residual herbicides for control of Palmer amaranth, as POST options are limited or ineffective. S-Metolachlor, acetochlor, fomesafen, and dicamba all provide PRE control of Palmer ama...
Palmer amaranth has greatly disrupted agricultural practices in the United States with its rapid growth and rapid evolution of herbicide resistance. This weed species is now suspected in Argentina. To document whether the suspected plant populations are indeed Palmer amaranth, molecular comparisons to known standards were conducted. Additionally, t...
The tolerance of bermudagrass and stargrass to the relatively new herbicide, aminocyclopyrachlor (ACP), must be known before it can be recommended for weed control in these forage systems. Field experiments were conducted in 2012 and 2013 in south-central Florida to determine the tolerance of established bermudagrass and stargrass to various rates...
Herbicide-resistant Palmer amaranth (Amaranthus palmeri S. Wats.) is the most troublesome weed in Florida cotton (Gossypium hirsutum L.) and peanut (Arachis hypogaea L.) production. In 2012, Palmer amaranth populations were surveyed to document the extent and level of resistance to glyphosate and imazapic. Mature seedheads were sampled at 31 locati...
Although castor (Ricinus communis L.) oil has high commercial value for industrial uses as well as a feedstock for biodiesel, the United States has relied on imported castor oil since 1972. In Florida, the crop has been considered as an alternative crop to the more traditional agronomic row crops and would likely be produced under center pivot or o...
A recent rise in suspected horse poisonings has brought new attention to creeping indigo (Indigofera spicata), a toxic plant which has reportedly been in Florida for as long as 90 years. This new 5-page fact sheet covers plant description, signs of creeping indigo toxicity, and roles of creeping indigo’s toxins, as well as treatment and management....
As dicamba resistance traits become more common in agronomic crops, the potential for off-site movement also increases. Little is currently known how common vegetable crops will respond to dicamba drift. The objective of this study was to evaluate the effect of dicamba and glyphosate drift on bell pepper and squash growth as a function of applicati...
Aminocyclopyrachlor (AMCP) is a pyrimidine carboxylic acid herbicide that is being evaluated for weed control on highway right-of-ways. The goal of this study was to evaluate weed control capabilities and tolerance of desirable turf to AMCP. The objective of the weed efficacy trial was to determine if AMCP (66, 132, and 263 g ai ha-1) was as effect...
Sicklepod and pitted morningglory are two of the most important weed species in row crop production in the Southeastern U.S. The upcoming introduction of soybean and cotton varieties resistant to 2,4-D and dicamba to control glyphosate resistant weeds will increase the reliance on these auxinic herbicides, but it is not clear how these herbicides w...
‘FL24D’ (Reg. No. CV-33 PI 673130) red clover (Trifolium pratense L.) is a synthetic cultivar selected for tolerance to the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D), and it is the most nondormant red clover cultivar available in today’s market. Red clover can experience significant broadleaf weed competition, especially during the establish...
Sesame is a promising new crop for Florida, but few herbicides have been registered for it as yet. This 2-page fact sheet provides weed-control strategies for sesame. Written by Jason Ferrell and Ramon Leon, and published by the UF Department of Agronomy, June 2015. (Photo credit: Doug Mayo) SS-AGR-392/AG396: Weed Management in Sesame (ufl.edu)
Studies under Florida conditions for susceptibility of pasture weed species to the new herbicide, aminocyclopyrachlor (ACP), are essential. Sensitivity of weed species was dependent upon the species and environment. Whitehead broom was not susceptible to ACP. Dogfennel control was consistently above 85% 1 yr after treatment with ACP at 140 g ha−1 a...
Palmer amaranth is a troublesome weed in cotton production. Yield losses of 65% have been reported from season-long Palmer amaranth competition with cotton. To determine whether water is a factor in this system, experiments were conduced in 2011, 2012, and 2013 in Citra, FL, and in Tifton, GA. In 2011, infrequent rainfall lead to drought stress. Th...
Resumen Sporobulus indicus var. pyramidalis, una especie nativa de Asia tropical, es una maleza perenne que afecta a muchos pastos mejorados en Florida y a lo largo del sureste de los Estados Unidos. Las dos variedades de S. indicus predominantes en Florida son la pequeña y la gigante. Desde 2008 hasta 2012, se realizaron tres experimentos de campo...
Biochar can potentially provide better conditions in the soil to increase plant growth. However, research has shown that weed species show minimal changes in germination and emergence patterns with the addition of biochar. Regardless, if biochar is used in the field it is important to monitor for changes in weed populations. This is especially impo...
Hairy indigo is an annual legume that was introduced to Florida as a forage crop. It has since escaped cultivation and can be a troublesome weed in some crop settings, particularly in peanut production, since we are attempting to control a legume weed in a legume crop. This 2-page fact sheet was written by Jason Ferrell, Blaire Colvin, and Ramon Le...
Using recurrent phenotypic selection we have developed a red clover (Trifolium pratense L.) cultivar (FL24D) resistant to 2,4-Dichlorophenoxyacetic acid (2,4-D) after six cycles. Approximately 20,000 seeds were broadcast seeded into metal flats and sprayed with 1.1 kg a.i. ha-1 2,4-D at 4 week (3 trifoliate leaf stage). One month later, 385 (1.95 %...
Southern crabgrass is a common turfgrass weed throughout the United States, and in Florida a troublesome problem in St. Augustinegrass lawns. Because of herbicide label changes and lack of herbicide tolerance, no POST herbicides are currently registered for homeowner use for crabgrass control in residential and commercial St. Augustinegrass lawns....
Smutgrass is a serious weed of improved perennial grass pastures, roadsides, natural areas, and waste areas in Florida. A 2003 survey found that smutgrass was second only to tropical soda apple as the most problematic weed species in Florida pastures, but now that practices to control tropical soda apple have been widely adopted in Florida, smutgra...
Growers have observed lack of control of ragweed parthenium with glyphosate at 0.84 kg ae ha(-1) used for weed control in noncrop areas and fallow fields in the Everglades Agricultural Area (EAA) of South Florida. Therefore, studies were conducted to (1) confirm and characterize the level of glyphosate resistance in ragweed parthenium from the EAA,...
Resumen El biochar y la vinaza son subproductos de la producción de biocombustibles que pueden ser usados como enmiendas de suelo. Sin embargo, su adición al suelo podría afectar la actividad de herbicidas PRE. Aunque estudios han mostrado que el biochar tiene una alta capacidad de adsorción de herbicidas, hay poca información disponible acerca del...
Integrated management programs are becoming increasingly necessary for nutsedge control in the absence of methyl bromide. In 2012, field studies were established and maintained for a period of 2 yr at two locations to evaluate the additive effect of fallow programs and preplant fumigants for nutsedge control in bell pepper. The study included eight...
Experiments were conducted throughout central Florida from 2010 to 2014 to determine the effectiveness of fluroxypyr or aminopyralid for control of spreading pricklypear. Aminopyralid + 2,4-D (0.09 + 0.75 kg ae ha−1) was not effective and provided only 15% control by 18 mo after application (MAT). However, fluroxypyr at 0.55 kg ae ha−1 or sequentia...
Abstract Vinasse and biochar are by-products of biofuel production that can be used as sources of nutrients to crops or soil amendments to improve soil quality. Despite the recent interest in biochar and vinasse effects on soil properties, little is known about their effect on weed communities. We hypothesized that the addition of biochar and vinas...
Profitable sugarcane production in Florida requires effective weed management. Herbicides provide an efficient and cost-effective means of weed control, but excessive use of a single herbicide or group of herbicides with the same mechanism of action has resulted in the development of herbicide-resistant weeds. In crops such as sugarcane where a lim...
The plant growth regulator flurprimidol (Cutless G) is registered for use on ornamental plants to reduce internode elongation and reduce trimming frequency. It has been hypothesized that timing of the trimming event can be related to the efficacy of the flurprimidol treatment. Granular flurprimidol was applied to well-established plants at a standa...
The potential widespread adoption of cotton and soybean varieties with 2,4-D and dicamba resistance traits in the southeastern US will increase the risk of accidental exposure of peanut to these herbicides because of drift or application errors. When such accidents occur, growers must decide between continuing the crop and terminating it. In order...
Palmer amaranth is one of the most troublesome weeds in the southeast. Effective control is essential in order to avoid reductions of crop yield. Due to widespread resistance to acetolactate synthase (ALS)-inhibiting herbicides, postemergence contact herbicides are often the only in-season option to control Palmer amaranth in peanut. Lactofen is a...
Planting rhizoma peanut (Arachis glabrata Benth.; RP) in strips into bahiagrass (Paspalum notatum Flugge) pastures can reduce establishment cost relative to conventional techniques, but research is needed to determine the best seedbed preparation methods. The objectives were to quantify the effects of four seedbed preparation techniques: glyphosate...
Vinasse and biochar are by-products of bioenergy production intended to be applied as a soil amendment due the benefits to the environment and soil quality. However, due the composition of each material the efficacy of pre-emergent (PRE) herbicides can be affected. Therefore, the objective of this study was to determine the influence of vinasse and...
Pyraflufen-ethyl is a phenylpyrazole herbicide for control of annual and perennial broadleaf weeds. Greenhouse and field studies were conducted to determine pyraflufen-ethyl efficacy for control of Parthenium hysterophorus at the rosette and flowering stages, respectively. Both growth stages were treated with pyraflufen-ethyl at six rates ranging f...
While castor (Ricinus communis L.) oil is an essential component in many industrial products, the U.S. currently imports all castor oil stocks due to the lack of domestic production of the crop since 1972. To reestablish U.S. production of castor, regional agronomic assessments of cultivars and management systems are required to assess the economic...
Vinasse and biochar are by-products of bioenergy production intended to be applied as a soil amendment due the benefits to the environment and soil quality. However, due the composition of each material the efficacy of pre-emergent (PRE) herbicides can be affected. Therefore, the objective of this study was to determine the influence of vinasse and...
Vinasse and biochar are by-products produced in large quantities by the bioenergy production. The incorporation of those materials back to the field can contribute to nutrient cycling and improvement of soil quality. Benefits of vinasse and biochar on soil properties are well documented. Although, little is known about vinasse and biochar impact on...
The profile color class method developed by Williams and Drexler in 1981 for the prediction of peanut harvest has proven to be a relative description of peanut maturity and is currently used by growers. However, the method requires the subjective visual classification of pods based on the development of color in the mesocarp layer of the hull which...
Coral ardisia, also known as coral berry, spice berry, and scratchthroat, was introduced to Florida in the early 1900′s for ornamental purposes. Since then, it has escaped cultivation, and it is found in hardwood hammocks and other moist, natural-wooded areas and grazing lands. Although there is no published literature supporting the theory that co...
Vinasse and biochar are byproducts of biofuel production that can be used as soil amendments to return nutrients to the field and improve soil quality. Although there is abundant information about the benefits of biochar and vinasse on soil properties, little is known about their effect on weed communities. We hypothesized that weed seed germinatio...
As the amount of methyl bromide approved for use in Florida strawberry diminishes, growers are faced with a forced transition to alternative fumigants. Many of these methyl bromide alternatives have been associated with reductions in weed control, requiring additional but complementary measures. POST herbicide options for annual strawberry are limi...
Planting rhizoma peanut (rp) (Arachis glabrata Benth.) in tilled strips in existing bahiagrass (Paspalum notatum Flüggé) pastures may be an option for establishing legume–grass mixtures in the U.S. Gulf Coast, but management during establishment is not well defined. The objectives were to determine the effect of weed control strategies and N fertil...
On the presence of Amaranthus palmeri (Amaranthaceae) in Argentina. Amaranthus palmeri, a species native from USA and Mexico, is cited for the first time for the Argentinean adventitious flora mainly in the Córdoba province and also in San Luis and La Pampa provinces. The species is described and illustrated and their geographical distribution is m...
