Red Rice (<i>Oryza sativa</i>) Control with Herbicide Treatments in Soybeans (<i>Glycine max</i>)

Khodayari, Khosro; Smith, Roy J.; Black, Howard

doi:10.1017/s0043174500026916

Cited by 31 publications

(32 citation statements)

References 5 publications

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“…These are soil-applied residual herbicides that are absorbed primarily by shoots and secondarily through roots of germinating seedlings, where disrupted cell division results in distorted tissue formation or plant death (Fuerst 1987). Experiments by Khodayari et al (1987) in soybean production demonstrated effective weedy rice control by VLCFA-inhibiting herbicides. When applied PPI, S-metolachlor at 2.2 kg ai ha −1 or alachlor at 3.6 kg ha −1 provided greater than 90% control of weedy rice in soybean production (Khodayari et al 1987).…”

Section: Introductionmentioning

confidence: 99%

“…Experiments by Khodayari et al (1987) in soybean production demonstrated effective weedy rice control by VLCFA-inhibiting herbicides. When applied PPI, S-metolachlor at 2.2 kg ai ha −1 or alachlor at 3.6 kg ha −1 provided greater than 90% control of weedy rice in soybean production (Khodayari et al 1987). Zemolin et al (2014) evaluated weedy rice control in soybean using PRE and early POST applications of S-metolachlor at 768, 1,152, and 1,680 g ha −1 .…”

Section: Introductionmentioning

confidence: 99%

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Efficacy of fall-applied residual herbicides on weedy rice control in rice (Oryza sativa L.)

Bertucci

Fogleman

Norsworthy³

2019

Weed Technol

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Field experiments were initiated near Colt, AR, in the fall of 2016 and continued through the summer of 2018 to evaluate rice tolerance and weedy (or red) rice control after fall-applied very-long-chain fatty acid (VLCFA)-inhibiting herbicides. A split-plot design was used for the experiment, with the whole-plot factor being winter condition (flooded or non-flooded) and the split-plot factors being herbicide and rate. Herbicide treatments included acetochlor, dimethenamid-P, pethoxamid, pyroxasulfone, and S-metolachlor applied at 1,050, 525, 420, 205, and 1,070 g ai ha−1 and at 2,100, 1,050, 840, 410, and 2,140 g ha−1 for low rates and high rates, respectively. Herbicides were applied in the fall, then ‘CL172’ rice was drill seeded in the spring of the following calendar year. Weedy rice control differed between years, but acetochlor and pyroxasulfone consistently provided the greatest levels of control across rates and flood conditions. Consequently, herbicides that best controlled weedy rice also caused the greatest injury to cultivated rice. Rice injury did not exceed 13% regardless of herbicide treatment at 3 wk after planting (WAP). However, the high rate of pyroxasulfone caused 20% rice injury at 5 WAP in 2018. Although it was expected that winter condition may affect residual activity of the VLCFA-inhibiting herbicides, herbicide selection and application rate both had much greater effects on rice injury and on weedy rice control. Based on these results, rice injury would be minimal or nonexistent after fall applications of the tested VLCFA inhibitors, and intermediate levels of weedy rice control may be achieved. The implementation of VLCFA-inhibiting herbicides in rice production systems would offer a novel herbicide site of action and offer a degree of selective control of weedy rice.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficacy of fall-applied residual herbicides on weedy rice control in rice (Oryza sativa L.)

Bertucci

Fogleman

Norsworthy³

2019

Weed Technol

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“…Red rice is often cited as one of the 10 most troublesome weeds in cultivated rice fields in the southern United States (Avila et al 2005; Craigmiles 1978; Khodayari et al 1987; Webster 2000). Barnyardgrass is another troublesome rice weed that can reduce rice yield by as much as 80% (Smith 1965).…”

Section: Introductionmentioning

confidence: 99%

Imazethapyr plus Propanil Mixtures in Imidazolinone-Resistant Rice

et al. 2017

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A study was conducted in three locations in Louisiana to evaluate interactions of imazethapyr at 0 and 70 g ai ha−1mixed with propanil at 0, 1,120, 2,240, 3,360, and 4,480 g ha−1for the control of red rice, barnyardgrass, and hemp sesbania. According to Blouin’s modified Colby’s, a synergistic response occurred for red rice treated with imazethapyr mixed with propanil at 4,480 g ha−1for all evaluations. Observed control was 93% to 95% compared with expected control of 81% to 87%. An antagonistic response occurred for barnyardgrass control with imazethapyr mixed with propanil at 1,120 g ha−1at 35 and 49 d after treatment (DAT), with control of 75% and 64%, respectively, compared with expected control of 89% and 78%. However, a neutral response occurred for barnyardgrass control when treated with all other imazethapyr plus propanil combinations. An antagonistic interaction occurred for hemp sesbania when treated with imazethapyr plus propanil at 3,360 and 4,480 g ha−1at 21 DAT with an observed control of 89% compared with an expected control of 96%; however, a neutral response occurred at all other evaluation dates. An increase in rice yield was observed with an imazethapyr plus propanil at 4,480 g ha−1mixture compared with a single application of imazethapyr or propanil at any rate evaluated.

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“…In a conventional soybean program, the effectiveness of preplant incorporated (PPI), preemergence (PRE), and postemergence (POST) herbicides are dependent on adequate soil moisture. Alachlor PPI controlled red rice at least 95%, but imazaquin plus metolachlor applied PRE with inadequate soil moisture controlled red rice 68% (Khodayari et al 1987). Imazethapyr applied at 70 g ai/ha controlled red rice at the five-leaf stage at least 90% (Askew et al 1998), but because of potential carryover the next year, it could be detrimental to conventional rice varieties (Johnson et al 1993).…”

Section: Introductionmentioning

confidence: 99%

Potential Use of Imazethapyr Mixtures in Drill-Seeded Imidazolinone-Resistant Rice

2004

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The efficacy of imazethapyr in drill-seeded imidazolinone-resistant rice was evaluated in Louisiana in 2000 and 2001. Imazethapyr was applied preemergence (PRE), or no PRE, followed by a postemergence (POST) application of imazethapyr alone, or in a mixture with bensulfuron, bentazon plus aciflurofen, carfentrazone, halosulfuron, propanil plus molinate, triclopyr, or V-10029. Imazethapyr applied PRE followed by a POST application of imazethapyr controlled barnyardgrass equivalent to or higher than other treatments evaluated. Red rice control at 35 days after postemergence treatment (DAT) was 66 to 81% with imazethapyr applied PRE followed by any POST application, but a reduction in control was observed with a POST application of imazethapyr. Although alligatorweed control increased with POST applications, these treatments suggested only suppression. Hemp sesbania control never exceeded 10% with imazethapyr-only treatments and at 35 DAT, all POST applications, except bensulfuron, increased control above 84%. Rice yield increased with treatments receiving a PRE application of imazethapyr compared with no imazethapyr applied PRE.

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Red Rice (Oryza sativa) Control with Herbicide Treatments in Soybeans (Glycine max)

Cited by 31 publications

References 5 publications

Efficacy of fall-applied residual herbicides on weedy rice control in rice (Oryza sativa L.)

Efficacy of fall-applied residual herbicides on weedy rice control in rice (Oryza sativa L.)

Imazethapyr plus Propanil Mixtures in Imidazolinone-Resistant Rice

Potential Use of Imazethapyr Mixtures in Drill-Seeded Imidazolinone-Resistant Rice

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