Use of Mixtures of Mesotrione, Imazethapyr, and Imazethapyr plus Imazapyr in Imidazolinone-Resistant Corn (Zea mays)<sup>1</sup>

Armel, Gregory R.; Wilson, H. R.; Richardson, Robert J.; Hines, Thomas E.

doi:10.1614/wt02-73

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…Green foxtail control with mesotrione at the use rate was 23% at 21 DAT (Table 1). These results are in agreement with earlier reports that control of similar species was poor with mesotrione (Armel et al 2003). The addition of atrazine to mesotrione at the use rate increased the control of green foxtail by 53%, compared with using mesotrione alone.…”

Section: Resultssupporting

confidence: 92%

Efficacy of Sulfonylurea Herbicides when Tank Mixed with Mesotrione

Schuster¹,

Al‐Khatib²,

Dille³

2008

Weed Technology

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Experiments were conducted in the greenhouse and the field to evaluate the efficacy of various sulfonylurea herbicides applied with mesotrione or mesotrione + atrazine. The addition of mesotrione or mesotrione + atrazine to sulfonylurea herbicides had no adverse effects on the control of large crabgrass or velvetleaf in a controlled environment. Tank mixing mesotrione or mesotrione + atrazine with nicosulfuron or foramsulfuron, however, antagonized nicosulfuron and foramsulfuron control of green foxtail and shattercane. Field experiments conducted in 2004 and 2005 also indicated that addition of mesotrione + atrazine to a sulfonylurea herbicide decreased herbicidal efficacy on green foxtail, yellow foxtail, and shattercane, compared with the sulfonylurea herbicide applied alone. In addition, increasing mesotrione application from 53 to 105 g/ha decreased efficacy of sulfonylurea herbicide in the tank mix on selected grass species. This research showed that the addition of mesotrione to sulfonylurea herbicides resulted in decreased efficacy of sulfonylurea herbicides on green foxtail, yellow foxtail, and shattercane. The addition of atrazine to the tank mix or an increased mesotrione rate will further decrease herbicide efficacy of sulfonylurea herbicides on shattercane and foxtail species.

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Section: Resultssupporting

confidence: 92%

Efficacy of Sulfonylurea Herbicides when Tank Mixed with Mesotrione

Schuster¹,

Al‐Khatib²,

Dille³

2008

Weed Technology

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“…A single application EPOST of imazethapyr plus imazapyr to imidazolinone-tolerant corn controlled common lambsquarters, pitted morningglory, entireleaf morningglory, and spurred anoda and was better than a single application of glyphosate, glufosinate, or nicosulfuron (Table 3). Imazethapyr plus imazapyr provides residual weed control, and the higher level of control was most likely due to the control obtained on weeds emerging after application (Armel et al 2003;Krausz and Kapusta 1998;Monks et al 1996;Wilcut 1991).…”

Section: Resultsmentioning

confidence: 99%

A Comparison of Weed Control in Herbicide-Resistant, Herbicide-Tolerant, and Conventional Corn

et al. 2008

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Experiments were conducted at three North Carolina research stations in 2003 to evaluate weed control and corn yield in glyphosate-resistant, glufosinate-resistant, imidazolinone-tolerant, and conventional corn weed management systems. Late-season control of common lambsquarters, large crabgrass, and yellow nutsedge increased with metolachlor PRE compared with no PRE herbicide treatment. Common lambsquarters, pitted morningglory, entireleaf morningglory, spurred anoda, and tropic croton control was improved by a single early POST (EPOST) application regardless of herbicide system. Control of common lambsquarters, pitted morningglory, entireleaf morningglory, and spurred anoda was similar for glyphosate and glufosinate systems for each POST over-the-top (POT) herbicide system. A single EPOST application of imazethapyr plus imazapyr to imidazolinone-tolerant corn controlled common lambsquarters, pitted morningglory, entireleaf morningglory, and spurred anoda and was better than a single EPOST application of glyphosate, glufosinate, or nicosulfuron. Tropic croton was controlled ≥ 95% with glufosinate or glyphosate, applied once or twice, or in mixture with metolachlor. A single EPOST application of imazethapyr plus imazapyr or nicosulfuron did not control tropic croton. Common lambsquarters, entireleaf morningglory, large crabgrass, Palmer amaranth, and yellow nutsedge control was greater with a late-POST–directed (LAYBY) of ametryn than no LAYBY. Systems that did not include a POT herbicide system had the lowest percentage in the weed-free yield and the lowest yield. Treatments that included a POT system with or without a PRE treatment of metolachlor yielded within 5% of the weed-free treatment, regardless of herbicide system.

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“…One of the biggest challenges facing weed management lies in the ability of plant communities to shift in response to a given weed management tactic (Armel et al 2003;Buhler 2002;Buhler et al 2000;Hilgenfeld et al 2004). This is most evident where a single method of weed control is used over time, resulting in high selection pressure and subsequent shifts in the composition of weed communities.…”

Section: Resultsmentioning

confidence: 99%

Evaluating the Economic Risk of Herbicide-Based Weed Management Systems in Corn and Soybean Using Stochastic Dominance Testing

2006

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Herbicide evaluation trials are typically conducted with the objective of rating herbicide efficacy and assessing crop yield loss. There is little if any attempt to quantify the economic risk associated with each treatment. The objective of this research was to use second-degree stochastic dominance to evaluate the economic stability of corn and soybean weed management systems between two contrasting environments. Weed management systems were evaluated in small-plot replicated trials over a 3-yr time period at two locations in southern Minnesota. One location (Waseca) had a slightly cooler and wetter environment than the second location (Lamberton). The Waseca location also had higher weed density and greater weed species diversity. Adjusted returns from weed management were calculated for each system by measuring economic returns, as determined by deducting weed management costs from the product of crop price and grain yield. Stochastic dominance is a technique that considers the entire distribution of net returns from weed management and compares these cumulative distributions as a basis for analyzing risk. Climate, soils, and weed diversity dictated differences in risk efficiency and effectiveness of the various weed management systems evaluated between the Waseca and Lamberton sites. Stochastic dominance testing is a useful tool for understanding long-term risk across environments. Results can be used to develop effective long-term weed management systems that minimize risk while maximizing profit potential.

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Use of Mixtures of Mesotrione, Imazethapyr, and Imazethapyr plus Imazapyr in Imidazolinone-Resistant Corn (Zea mays)¹

Cited by 5 publications

References 13 publications

Efficacy of Sulfonylurea Herbicides when Tank Mixed with Mesotrione

Efficacy of Sulfonylurea Herbicides when Tank Mixed with Mesotrione

A Comparison of Weed Control in Herbicide-Resistant, Herbicide-Tolerant, and Conventional Corn

Evaluating the Economic Risk of Herbicide-Based Weed Management Systems in Corn and Soybean Using Stochastic Dominance Testing

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Use of Mixtures of Mesotrione, Imazethapyr, and Imazethapyr plus Imazapyr in Imidazolinone-Resistant Corn (Zea mays)1

Cited by 5 publications

References 13 publications

Efficacy of Sulfonylurea Herbicides when Tank Mixed with Mesotrione

Efficacy of Sulfonylurea Herbicides when Tank Mixed with Mesotrione

A Comparison of Weed Control in Herbicide-Resistant, Herbicide-Tolerant, and Conventional Corn

Evaluating the Economic Risk of Herbicide-Based Weed Management Systems in Corn and Soybean Using Stochastic Dominance Testing

Contact Info

Product

Resources

About

Use of Mixtures of Mesotrione, Imazethapyr, and Imazethapyr plus Imazapyr in Imidazolinone-Resistant Corn (Zea mays)¹