Evaluation of Imazaquin for Weed Control in Flue-Cured Tobacco (<i>Nicotiana tabacum</i>)

Walls, F. Robert; Worsham, A. D.; Collins, W. K.; Corbin, F. T.; Bradley, J. R.

doi:10.1017/s0043174500079418

Cited by 7 publications

(14 citation statements)

References 2 publications

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“…In all years, there were few differences in price among herbicide treatments, regardless of application method. In other research, Walls et al (1987) found few differences in the quality of tobacco among herbicide treatments, and differences in gross monetary returns occurred only when severe injury reduced yields.…”

Section: Resultsmentioning

confidence: 73%

“…Most herbicides registered for use in tobacco control annual grasses. Previous research evaluated broadleaf weed control in tobacco with herbicides such as imazaquin (Hagood and Komm 1987;Walls et al 1987) and fomesafen (Bridges and Stephenson 1991). Effective weed control was observed; however, neither herbicide was registered due to potential tobacco injury.…”

Section: Introductionmentioning

confidence: 99%

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Tolerance of Maryland-Type Tobacco (Nicotiana tabacum) to Sulfentrazone¹

Ritter

Menbere²,

Momen³

2005

Weed Technology

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Field experiments were conducted from 2000 to 2002 at the Southern Maryland Research and Education Facility located in Upper Marlboro, MD to evaluate PPI and preemergence/prior-to-transplanting (PRE-T) applications of sulfentrazone in combination with clomazone or pendimethalin on crop injury and yield of Maryland-type tobacco. Pendimethalin was also evaluated alone. The highest levels of tobacco injury in 2000 occurred 3 wk after treatment (WAT) with PPI applications of sulfentrazone plus pendimethalin at 0.35 + 0.84 and 0.42 + 0.84 kg ai/ha, averaging 37 and 28%, respectively. In 2001, PPI applications of sulfentrazone plus clomazone at 0.42 + 0.84 kg/ha or sulfentrazone plus pendimethalin at 0.42 + 0.84 kg/ha caused 18 and 12% injury, respectively, 3 WAT. Injury in 2002 with all treatments averaged 7% or less 3 WAT. Greater rainfall through 3 WAT occurred in 2000 than in 2001 or 2002, likely contributing to the higher injury in 2000. Tobacco yields were generally similar among herbicide treatments in 2000 and 2001, and tobacco yields for all herbicide treatments were similar in 2002. The quality index was similar in 2000 and 2001, and varied slightly in 2002 among all herbicide treatments. Although a lower price was calculated for the nontreated controls, price did not vary among most herbicide treatments each year. This research shows that injury to Maryland-type tobacco can occur with sulfentrazone in combination with clomazone or pendimethalin, particularly when incorporated, and when high rainfall occurs soon after transplanting. However, injury is transient and generally has no negative influence on tobacco yield, quality, or price.

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Section: Resultsmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Tolerance of Maryland-Type Tobacco (Nicotiana tabacum) to Sulfentrazone¹

Ritter

Menbere²,

Momen³

2005

Weed Technology

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“…No herbicides are currently registered for postemergence broadleaf weed control in dark tobacco. Previous research with broadleaf herbicides such as imazaquin (Hagood and Komm 1987;Walls et al 1993) and fomesafen (Bridges and Stephenson 1991) showed effective weed control but unacceptable tobacco injury.…”

mentioning

confidence: 92%

Dark Tobacco (Nicotiana tabacum) Tolerance to Trifloxysulfuron and Halosulfuron

Bailey

2007

Weed technol.

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Field experiments were conducted at two locations in 2003 and 2004 to determine dark tobacco tolerance and weed control from postemergence over-the-top (POT) and postemergence-directed (PD) applications of trifloxysulfuron and halosulfuron. Trifloxysulfuron was applied at 3.6 or 5.3 g ai/ha and halosulfuron was applied at 36 or 53 g ai/ha. Trifloxysulfuron POT injured ‘Narrowleaf Madole’ dark tobacco 16 to 33% and halosulfuron POT caused 32 to 33% injury at 1 wk after treatment (WAT). Tobacco plant height at 1 WAT with POT applications was also reduced by up to 31% at one of two locations. Tobacco injury from POT applications had dissipated to 6 to 12% by 4 WAT. Despite extensive early-season injury, most POT herbicide applications did not significantly reduce tobacco yield, mean grade index, and gross revenue compared to tobacco that only received pretransplant applications of sulfentrazone plus clomazone. Dark tobacco was much more tolerant to PD applications of either herbicide, with no more than 4% injury observed at 1 WAT. Neither herbicide controlled horsenettle more than 57% at either application rate or method. Although trifloxysulfuron and halosulfuron could contribute to tobacco weed control programs by providing postemergence control of several common weed species, PD applications would be the only acceptable method of application due to excessive injury observed from POT applications of these herbicides.

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“…), common ragweed, and sicklepod (Cassia obtusifolia L.). The influence of these weeds on tobacco yield and quality has been documented (4,15,18).…”

Section: Introductionmentioning

confidence: 99%

“…1993. Volume 7:370-375 WEED TECHNOLOGY cation except PPI (15). The objective of this study was to investigate the effects of application methods on the absorption, translocation, and metabolism of imazaquin in field-grown, flue-cured tobacco.…”

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confidence: 99%

Imazaquin Absorption, Translocation, and Metabolism in Flue-Cured Tobacco

et al. 1993

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Absorption of14C-imazaquin by leaves of field-grown flue-cured tobacco was similar when applied to young seedlings immediately after transplanting or to plants 3 wk after transplanting. The distribution of14C in treated leaves indicated that 40% was absorbed, 54% remained in water extracts of leaf surfaces, and 6% was found in the epicuticular wax layer 8 d after treatment. Translocation of the herbicide from treated leaves to roots was very low (4 to 5%). In contrast, soil applications of imazaquin and subsequent uptake by roots resulted in retention of 40 to 53% in roots and translocation of 47 to 60% to shoots after 8 d. Analyses of methanol-soluble extracts of14C indicated that more than 77% of the foliar-applied herbicide was metabolized in roots and upper shoots after 2 d. Similarly, 64% or more of the imazaquin was degraded in roots and shoots 2 d after root absorption.

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Evaluation of Imazaquin for Weed Control in Flue-Cured Tobacco (Nicotiana tabacum)

Cited by 7 publications

References 2 publications

Tolerance of Maryland-Type Tobacco (Nicotiana tabacum) to Sulfentrazone¹

Tolerance of Maryland-Type Tobacco (Nicotiana tabacum) to Sulfentrazone¹

Dark Tobacco (Nicotiana tabacum) Tolerance to Trifloxysulfuron and Halosulfuron

Imazaquin Absorption, Translocation, and Metabolism in Flue-Cured Tobacco

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Evaluation of Imazaquin for Weed Control in Flue-Cured Tobacco (Nicotiana tabacum)

Cited by 7 publications

References 2 publications

Tolerance of Maryland-Type Tobacco (Nicotiana tabacum) to Sulfentrazone1

Tolerance of Maryland-Type Tobacco (Nicotiana tabacum) to Sulfentrazone1

Dark Tobacco (Nicotiana tabacum) Tolerance to Trifloxysulfuron and Halosulfuron

Imazaquin Absorption, Translocation, and Metabolism in Flue-Cured Tobacco

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Product

Resources

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Tolerance of Maryland-Type Tobacco (Nicotiana tabacum) to Sulfentrazone¹

Tolerance of Maryland-Type Tobacco (Nicotiana tabacum) to Sulfentrazone¹