Postemergence Grass and Broadleaf Herbicide Interactions for Red Rice (<i>Oryza sativa</i>) Control in Soybeans (<i>Glycine max</i>)

Minton, Bradford W.; Shaw, David R.; Kurtz, Mark E.

doi:10.1017/s0890037x00031894

Cited by 43 publications

(47 citation statements)

References 11 publications

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“…Overall, at the rates tested, quizalofop appears to have greater grass activity than either fenoxaprop or cyhalofop, which is similar to previous experiments which have often shown quizalofop to outperform other ACCase-inhibiting herbicides [24][25][26]. Moreover, quizalofop remained more effective on the grass weeds evaluated at larger growth stages (5-to 6-leaf, 12-to 16-leaf), whereas fenoxaprop and cyhalofop efficacy quickly diminished.…”

Section: Efficacy Of Quizalofop Compared To Registered Ricesupporting

confidence: 83%

Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems

Lancaster

Norsworthy

Scott³

2018

International Journal of Agronomy

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Due to the ongoing evolution of herbicide-resistant weeds, new technologies are needed to maintain effective levels of control. A new rice variety that will be resistant to quizalofop, an acetyl coenzyme A carboxylase-(ACCase-) inhibiting herbicide, is currently under development. With the anticipated launch of this technology in 2018, multiple experiments were conducted to determine effectiveness of the quizalofop-resistant rice system for common grass weed species found in Arkansas rice production. One hundred and twenty-six barnyardgrass populations were collected across Arkansas and treated with quizalofop at 80 g ai hato determine a baseline of response. All populations evaluated were effectively controlled (≥92%) by quizalofop, with only 13 populations resulting in lower than 98% control. A greenhouse and field trial were conducted to compare efficacy of quizalofop to currently labeled rice graminicides for control of common rice grass weeds. Results from the greenhouse experiment showed that quizalofop treatments resulted in greater efficacy of common grass weeds compared to cyhalofop or fenoxaprop. This was especially apparent at the larger grass growth stages. A field experiment conducted compared season-long weed control programs of quizalofop to fenoxaprop and cyhalofop. The quizalofop-containing treatments were no better than fenoxaprop and cyhalofop for barnyardgrass and broadleaf signalgrass control. Barnyardgrass and broadleaf signalgrass control were greater than 96% for all herbicide treatments. An additional field experiment was conducted to determine the best rate structure for sequential applications of quizalofop in rice. Sequential applications of quizalofop at 120 g ha −1 followed by 120 g ha −1 two weeks later resulted in the highest barnyardgrass and broadleaf signalgrass control. Likewise, applying the full seasonal use rate of 240 g ha −1 of quizalofop resulted in greater control compared to 200 and 160 g ha −1 . Results from this research indicate a strong benefit from quizalofop use in rice.

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Section: Efficacy Of Quizalofop Compared To Registered Ricesupporting

confidence: 83%

Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems

Lancaster

Norsworthy

Scott³

2018

International Journal of Agronomy

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“…Other researchers also have reported inconsistent responses with mixtures of postemergence graminicides and various broadleafherbicides (3,15,19,21). The magnitude of antagonism we observedwhen 2,4-DB was mixed with the graminicides is similar to that observed previously with mixtures of phenoxyalkanoic acid herbicides and postemergence graminicides (5,17,22,23,24) but less than that often observedwhen other types of broadleafherbicides are mixed with the graminicides (3,19,20,22).…”

Section: Resultssupporting

confidence: 84%

“…In previous research (17,22,23,24), some of the postemergence graminicides were more susceptible to antagonism by a given broadleaf herbicide than were other graminicides. In our experiment, there was no indication that one graminicide was consistently more susceptible to antagonism by 2,4-DB than were the other graminicides.…”

Section: Resultsmentioning

confidence: 89%

Interaction of 2,4-DB With Postemergence Graminicides

1993

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Field experiments were conducted in North Carolina, Georgia, and Texas to determine if grass control is affected when postemergence-applied graminicides are mixed with 2,4-D B. Grass species evaluated included broadleaf signalgrass [Brachiaria platyphylla (Griseb.) Nash], goosegrass [Eleusine indica (L.) Gaertn.], johnsongrass [Sorghum halepense (L.) Pers.], large crabgrass [Digitaria sanguinalis (L.) Scop.], southern crabgrass [Digitaria ciliaris (Retz.) Koel.], and Texas panicum (Panicum texanum Bucld.). Mixing 2,4-DB with the graminicides reduced grass control 8 to 15% at five of 11 locations. The antagonism was not specific for a particular grass species or graminicide, and it was not restricted to grasses under adverse growing conditions. Applying the 2,4-DB 24 hours after graminicide application alleviated the antagonism. Applying the 2,4-DB 24 hours before~e graminicides overcame the antagonism at three of the five locations.

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“…Quizalofop provides postemergence control of annual and perennial grasses with little to no activity on broadleaf weeds and sedges (Shaner 2014). Quizalofop has been used to substantially reduce weedy rice infestations during soybean production when applied at rates from 35 to 84 g ai ha −1 and from 84 to 112 g ha −1 in noncrop areas for annual or perennial grass control (Askew et al 1998; Minton et al 1989). The targeted single quizalofop application rate in ACCase-resistant (ACCase-R) rice production will be 92 to 155 g ha −1 , not to exceed 240 g ha −1 yr −1 (Anonymous 2017).…”

mentioning

confidence: 99%

Interactions Between Quizalofop-p-ethyl and Acetolactate Synthase–Inhibiting Herbicides in Acetyl-coA Carboxylase Inhibitor–Resistant Rice Production

Rustom¹,

Webster

Blouin

et al. 2018

Weed Technol

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A field study was conducted in 2015 and 2016 at the H. Rouse Caffey Rice Research Station (RRS) to evaluate antagonistic, synergistic, or neutral interactions of quizalofop when mixed with ALS-inhibiting herbicides labeled in rice production. Quizalofop was applied at 120 g ai ha−1. Mixture herbicides included penoxsulam at 40 g ai ha−1, penoxsulam+triclopyr at 352 g ai ha−1, halosulfuron at 53 g ai ha−1, bispyribac at 34 g ai ha−1, orthosulfamuron+halosulfuron at 94 g ai ha−1, orthosulfamuron+quinclorac at 491 g ai ha−1, imazosulfuron at 211 g ai ha−1, and bensulfuron at 43 g ai ha−1. All ALS herbicides mixed with quizalofop indicated antagonistic responses for red rice, CL-111, CLXL 745, or barnyardgrass control at either 14 or 28 days after treatment (DAT). At 28 DAT, quizalofop mixed with penoxsulam or bispyribac controlled barnyardgrass 34 to 38%, compared with an expected control of 97%. In addition, these same mixtures controlled red rice, CL-111, and CLXL-745 61 to 67% at 28 DAT compared with an expected control of 96 to 97%. A second application of quizalofop at 120 g ha−1was applied at 28 DAT. At 42 DAT, neutral responses were indicated for all mixtures except with quizalofop mixed with penoxsulam containing products.

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Postemergence Grass and Broadleaf Herbicide Interactions for Red Rice (Oryza sativa) Control in Soybeans (Glycine max)

Cited by 43 publications

References 11 publications

Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems

Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems

Interaction of 2,4-DB With Postemergence Graminicides

Interactions Between Quizalofop-p-ethyl and Acetolactate Synthase–Inhibiting Herbicides in Acetyl-coA Carboxylase Inhibitor–Resistant Rice Production

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