Impact of Herbicides and Application Timing on Weed Control, Yield, and Nutritive Value of Tall Fescue Pastures and Hayfields

Payne, Kristin K.; Sleugh, Byron B.; Bradley, Kevin W.

doi:10.1614/wt-d-10-00039.1

Cited by 17 publications

(16 citation statements)

References 16 publications

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“…One of the long‐standing issues associated with broadleaf weed control in pastures with herbicides is the typical concomitant negative impact on desirable legumes. Most legumes are highly sensitive to the picolinic acid and benzoic acid herbicides widely used in pastures (Beeler et al, 2003; Payne et al, 2010). Negative impacts occur through direct injury from the herbicide and often from soil residual activity that may last from months to years after the application.…”

Section: Hairy Buttercup: a Widespread Problem In Southeastern Us Pmentioning

confidence: 99%

Hairy Buttercup Control and White Clover Tolerance to Pasture Herbicides

Enloe

Johnson

Renz³

et al. 2014

Forage grazinglands

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Hairy buttercup (Ranunculus sardous Crantz) is a winter annual weed in southeastern U.S. pastures. Its potential toxicity and aggressive spring growth have made it a widespread concern among producers, especially in mixed grass‐legume pastures. Few published studies have reported on its ecology or control. Furthermore, a lack of herbicide selectivity has historically been a problem when broadleaf weed control is needed in mixed grass‐legume pastures. To address this issue, we compared multiple formulations of 2,4‐D with imazethapyr, hexazinone, and aminopyralid + 2,4‐D at December and February application timings for hairy buttercup control and white clover (Trifolium repens L.) tolerance. Dimethylamine, diethanolamine, and ester formulations of 2,4‐D were effective in controlling hairy buttercup at 0.4 kg/ha. White clover cover was similar between all 2,4‐D treated plots and the unsprayed control plots. Imazethapyr was also effective in controlling hairy buttercup. Hexazinone was not effective for hairy buttercup control and resulted in a considerable reduction in white clover. Aminopyralid + 2,4‐D provided excellent hairy buttercup control but also eliminated clover cover. Herbicide treatments were very effective at both application timings. These studies indicate that hairy buttercup can be effectively controlled in mixed white clover/grass pastures with multiple herbicide options without reducing white clover populations.

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Section: Hairy Buttercup: a Widespread Problem In Southeastern Us Pmentioning

confidence: 99%

Hairy Buttercup Control and White Clover Tolerance to Pasture Herbicides

Enloe

Johnson

Renz³

et al. 2014

Forage grazinglands

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“…The importance of timing may depend on the growth form of the weed, the type of herbicide intended for use and environmental constraints. Selective herbicides in general may be more effective on broad‐leaved weeds in rangelands when applications are made in autumn (DiTomaso, ; Payne et al ., ), but some species are controlled more effectively in spring (Lym & Messersmith, ).…”

Section: Discussionmentioning

confidence: 99%

Testing the performance of registered herbicides on the control of Campuloclinium macrocephalum (Asteraceae) in South African grasslands

Goodall

Witkowski

2014

Weed Research

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We report on the performance of the registered herbicides picloram and metsulfuron-methyl on the control of Campuloclinium macrocephalum (pompom weed) in grasslands. Herbicide trials in hydric and xeric grasslands were treated for three consecutive years in either summer (February) or autumn (April) and monitored for an additional 3 years after spraying ceased. Uncontrolled factors such as a host-specific rust, fire and drought were observed from the second year of the study. Metsulfuron-methyl and picloram did not differ in efficacy according to the timing of applications, but average mortality of marked plants was <80% expected of registered herbicides. Populations of C. macrocephalum in plots were reduced proportionately to the percentage mortality of marked plants.Picloram and metsulfuron-methyl applied at 252 g a.i. ha À1 and 45 g a.i. ha À1 , respectively, were not detectable by gas chromatography in the upper 25 cm of the soil profile during any of the sampling intervals from 0 to 56 days after treatment. Three annual applications of registered herbicide did not reduce C. macrocephalum successfully, and it is estimated that between five (summer) to seven (autumn) annual treatments are required to reduce weed density to <1 plant per plot (25 m 2 ). Future research should focus on rust-herbicide interactions, the role of fire in seedbank management and fire as a treatment that could be integrated with chemical control.

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“…When averaged across all herbicide treatments, total forage yields were 2708 kg/ha among herbicide-treated plots, while total forage yields in the untreated plots averaged 2878 kg/ha. Other authors have reported reduced total forage yield as a common response to herbicide treatment and weed removal in grass pastures and hay field settings (14,15).…”

Section: Forage Yield and Forage Yield Componentsmentioning

confidence: 99%

Fall Herbicide Treatments Reduce Northern Dewberry (Rubus flagellaris ) Stem Density in Tall Fescue Pastures and Haylands

Sather

Bradley

2012

Forage & Grazinglands

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Field experiments were conducted from 2008 to 2011 to evaluate the effects of various fall herbicide treatments on northern dewberry (Rubus flagellaris Willd.) control and spring forage yields in tall fescue [Schedonorus phoenix (Scop.) Holub] pastures and haylands. When applied in the fall, all herbicide treatments evaluated in this research, except aminopyralid plus 2,4‐D ester (0.12 + 1.0 kg/ha) and triclopyr plus 2,4‐D ester (0.56 + 1.1 kg/ha), reduced northern dewberry stem density 50 to 66% the season following treatment. Treatments that contained metsulfuron tended to provide some of the greatest levels of visual control and stem reduction. The spring following treatment, herbicide treatment did not influence forage grass yields compared to the untreated control; however, herbicide treatment reduced northern dewberry and other weed components of the total forage yield compared to the untreated control. These experiments indicate fall applications of herbicides that contain metsulfuron will reduce northern dewberry stem density by at least 50%, but that follow‐up treatments will be necessary where severe infestations exist.

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Impact of Herbicides and Application Timing on Weed Control, Yield, and Nutritive Value of Tall Fescue Pastures and Hayfields

Cited by 17 publications

References 16 publications

Hairy Buttercup Control and White Clover Tolerance to Pasture Herbicides

Hairy Buttercup Control and White Clover Tolerance to Pasture Herbicides

Testing the performance of registered herbicides on the control of Campuloclinium macrocephalum (Asteraceae) in South African grasslands

Fall Herbicide Treatments Reduce Northern Dewberry (Rubus flagellaris ) Stem Density in Tall Fescue Pastures and Haylands

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