Effect of Carrier Volume on Grain Sorghum Response to Simulated Drift of Nicosulfuron

Matocha, Mark A.; Jones, Curtis A.

doi:10.1614/wt-d-15-00006.1

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…Nicosulfuron, which is labeled in Inzen™ grain sorghum, caused 49% injury to conventional sorghum (Table 3). These results were consistent with previous studies of injury to conventional grain sorghum applied with nicosulfuron, which showed levels ranging from 19% to 67% depending upon rate applied (Matocha and Jones 2015).…”

Section: Sensitivity To Pre Applications Of Als-inhibiting Herbicidessupporting

confidence: 93%

Resistance of Inzen™ grain sorghum to multiple PRE- and POST-applied acetolactate synthase–inhibiting herbicides

Bowman

Barber²,

Norsworthy³

et al. 2020

Weed Technol

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A non-GMO trait called Inzen™ was recently commercialized in grain sorghum to combat weedy grasses, allowing the use of nicosulfuron POST in the crop. Inzen™ grain sorghum carries a double mutation in the acetolactate synthase (ALS) gene Val560Ile and Trp574Leu, which potentially results in cross-resistance to a wide assortment of ALS-inhibiting herbicides. To evaluate the scope of cross-resistance to Weed Science Society of America Group 2 herbicides in addition to nicosulfuron, tests were conducted in 2016 and 2017 at the Lon Mann Cotton Research Station near Marianna, AR, the Arkansas Agricultural Research and Extension Center in Fayetteville, AR, and in 2016 at the Pine Tree Research Station near Colt, AR. The tests included ALS-inhibiting herbicides from all five families: sulfonylureas, imidazolinones, pyrimidinylthiobenzoics, triazolinones, and triazolopyrimidines. Treatments were made PRE or POST to grain sorghum at a 1X rate for crops in which each herbicide is labeled. Grain sorghum planted in the PRE trial included Inzen™ and a conventional cultivar. Visible estimates of injury and sorghum heights were recorded at 2 and 4 weeks after herbicide application and yield data were collected at crop maturity. In the PRE trial, there was no visible injury, sorghum height reduction, or yield loss in plots containing the Inzen™ cultivar. Applications made POST to the Inzen™ grain sorghum caused visible injury, sorghum height reduction, and yield loss of 20%, 13%, and 35%, respectively, only in plots where bispyribac-Na was applied. There was no impact on the crop from other POST-applied ALS-inhibiting herbicides. These results demonstrate that the Inzen™ trait confers cross-resistance to most ALS-inhibiting herbicides and could offer promising new alternatives for weed control and protection from carryover of residual ALS-inhbiting herbicides in grain sorghum.

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Section: Sensitivity To Pre Applications Of Als-inhibiting Herbicidessupporting

confidence: 93%

Resistance of Inzen™ grain sorghum to multiple PRE- and POST-applied acetolactate synthase–inhibiting herbicides

Bowman

Barber²,

Norsworthy³

et al. 2020

Weed Technol

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“…Matsum. & Nakai] (Al-Khatib et al 2003; Bailey and Kapusta 1993; Culpepper et al 2018; Ellis et al 2002, 2003; Ellis and Griffin 2002; Matocha and Jones 2015; Steppig et al 2017). Collectively, they evaluated 2,4-D, dicamba, glufosinate, glyphosate, halosulfuron, imazethapyr, mesotrione, nicosulfuron, primisulfuron, quizalfop, propanil, sethoxydim, and tembotrione.…”

Section: Introductionmentioning

confidence: 99%

Effects of Low-Dose Flumioxazin and Metribuzin Postemergence Applications on Soybean

et al. 2018

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All herbicides will move off-target to sensitive crops when not applied correctly. Therefore, low-dose applications of flumioxazin and metribuzin were evaluated in soybean at the unifoliate, V2, and V4 growth stages. Rates evaluated were 12.5%, 25%, and 50% of the labeled use rates of 72 and 316 g ai ha−1 of flumioxazin and metribuzin, respectively. Flumioxazin injury was characterized by necrosis and visible height and width reduction. Injury increased with rate 3 d after treatment (DAT), with unifoliate, V2, and V4 soybean injured 15% to 30%, 18% to 27%, and 5% to 8%, respectively. Unifoliate and V4 soybean were injured more than V4 soybean 3 to 14 DAT, but injury decreased to <5% by 42 DAT. Soybean yields in the flumioxazin study were 92% to 96% of the nontreated, resulting in a yield loss of 196 to 393 kg ha−1 and a revenue loss of 71 to 141 US$ ha−1. Metribuzin injury was primarily chlorosis with necrosis and a visible reduction in soybean height and width. Soybean at the V2 growth stage was injured 14% more than V4 soybean 3 DAT, regardless of metribuzin rate. Injury to V2 and V4 soybean was similar 14 DAT, with injury of 21% to 40% across rates. Soybean injury when treated at the V2 and V4 growth stages was 6% to 29% 42 DAT compared to unifoliate soybean at 0 to 17%. Soybean yields in the metribuzin study yields were 96% to 98% of the nontreated. However, a 2% to 4% reduction equates to a loss of 90 to 180 kg ha−1 and a revenue loss of 32 to 65 US$ ha−1. Unifoliate and V2 soybean are more sensitive to a low dose of flumioxazin POST, and V2 and V4 soybean are more sensitive to a low dose of metribuzin POST. Injury and the impact on soybean growth could potentially cause economic loss for a soybean producer.

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“…Matsum. & Nakai] (Al- Khatib et al, 2003;Bailey and Kapusta, 1993;Culpepper et al, 2018;Ellis et al, 2002Ellis et al, , 2003Ellis and Griffin, 2002;Matocha and Jones, 2015;Steppig et al, 2017). Collectively, they evaluated 2,4-D, dicamba, glufosinate, glyphosate, halosulfuron, imazethapyr, mesotrione, nicosulfuron, primisulfuron, quizalfop, propanil, sethoxydim, and tembotrione.…”

mentioning

confidence: 99%

Cotton (Gossypium hirsutum L.) Injury, Growth, and Yield Following Low-Dose Flumioxazin Postemergence Applications

Stephenson¹,

Spivey²,

Deliberto³

et al. 2019

JCS

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The effects of postemergence (POST) herbicides off-target movement on cotton has been evaluated, but no data is available evaluating simulated off-target movement of residual herbicides. Therefore, low-dose POST applications of flumioxazin were evaluated in cotton at the cotyledon, two- and four-leaf growth stages. Rates evaluated were 12.5, 25, and 50% of the labeled use rate of 72 g ai ha-1. Necrosis, cotton height and width reduction was observed. Cotyledon cotton was injured 69 to 86%, 80 to 91%, and 84 to 97% following the 12.5, 25, and 50% flumioxazin rates, respectively, 3 through 42 DAT. Injury of two-leaf cotton increased from 3 to 14 DAT for all flumioxazin rates with maximum injury of 40, 47, and 58% following the 12.5, 25, and 50% rates, respectively, 14 DAT, but injury decreased following the 14 DAT evaluation. Injury of four-leaf cotton was 46 to 58% 3 DAT and decreased over time regardless of rate. At 42 DAT, two- and four-leaf cotton was injured 14 to 33% and increased with flumioxazin rate. Cotton height and width averaged 40, 80, 86% of the nontreated following the cotyledon, two-, and four-leaf application timings, respectively, 42 DAT. In addition, height was more influenced by flumioxazin rate than cotton width. Yields were 24, 52, and 62% of the nontreated following the cotyledon, two-, and four-leaf applications timings, respectively. In addition, yields following the 12.5, 25, and 50% rates were 53, 45, and 40% of the nontreated. Low-doses of flumioxazin reduced revenue $1,172 to $2,344 ha-1 for lint and $212 to 423 ha-1 for cotton seed. Low-doses of flumioxazin POST can have negative effects on cotton growth and yield and could cause severe economic loss for a cotton producer.

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Effect of Carrier Volume on Grain Sorghum Response to Simulated Drift of Nicosulfuron

Cited by 6 publications

References 19 publications

Resistance of Inzen™ grain sorghum to multiple PRE- and POST-applied acetolactate synthase–inhibiting herbicides

Resistance of Inzen™ grain sorghum to multiple PRE- and POST-applied acetolactate synthase–inhibiting herbicides

Effects of Low-Dose Flumioxazin and Metribuzin Postemergence Applications on Soybean

Cotton (Gossypium hirsutum L.) Injury, Growth, and Yield Following Low-Dose Flumioxazin Postemergence Applications

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