Evaluating Postemergence Herbicides, Safener, and Tolerant Hybrids for Corn Response

VanGessel, Mark J.; Johnson, Quintin R.; Scott, Barbara A.

doi:10.1614/wt-d-16-00011.1

Cited by 11 publications

(15 citation statements)

References 27 publications

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“…They exhibit excellent herbicidal effects on a broad range of weeds. Nevertheless, the phytotoxicity of sulfonylurea herbicides on nontarget crops has been reported [1,2]. According to a survey, after the application of chlorsulfuron, crop damage and yield decline can occur [3].…”

Section: Introductionmentioning

confidence: 99%

Protective Responses Induced by Chiral 3-Dichloroacetyl Oxazolidine Safeners in Maize (Zea mays L.) and the Detoxification Mechanism

et al. 2019

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Herbicide safeners selectively protect crops from herbicide injury while maintaining the herbicidal effect on the target weed. To some extent, the detoxification of herbicides is related to the effect of herbicide safeners on the level and activity of herbicide target enzymes. In this work, the expression of the detoxifying enzyme glutathione S-transferase (GST) and antioxidant enzyme activities in maize seedlings were studied in the presence of three potential herbicide safeners: 3-dichloroacetyl oxazolidine and its two optical isomers. Further, the protective effect of chiral herbicide safeners on detoxifying chlorsulfuron in maize was evaluated. All safeners increased the expression levels of herbicide detoxifying enzymes, including GST, catalase (CAT), and peroxidase (POD) to reduce sulfonylurea herbicide phytotoxicity in maize seedlings. Our results indicate that the R-isomer of 3-(dichloroacetyl)-2,2,5-trimethyl-1,3-oxazolidine can induce glutathione (GSH) production, GST activity, and the ability of GST to react with the substrate 1-chloro-2,4-dinitrobenzene (CDNB) in maize, meaning that the R-isomer can protect maize from damage by chlorsulfuron. Information about antioxidative enzyme activity was obtained to determine the role of chiral safeners in overcoming the oxidative stress in maize attributed to herbicides. The interaction of safeners and active target sites of acetolactate synthase (ALS) was demonstrated by molecular docking modeling, which indicated that both isomers could form a good interaction with ALS. Our findings suggest that the detoxification mechanism of chiral safeners might involve the induction of the activity of herbicide detoxifying enzymes as well as the completion of the target active site between the safener and chlorsulfuron.

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Section: Introductionmentioning

confidence: 99%

Protective Responses Induced by Chiral 3-Dichloroacetyl Oxazolidine Safeners in Maize (Zea mays L.) and the Detoxification Mechanism

et al. 2019

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“…Corn yields were reduced by 11 to 16 bu/acre with both the 1× and 2× rates of nicosulfuron + rimsulfuron + isoxadifen and thiencarbazone + tembotrione + isoxadifen, when compared with the NTC (Table 3). Recently, VanGessel et al (2016) reported similar reductions in corn grain yield with combinations of rimsulfuron and isoxadifen. In other research, thiencarbazone + tembotrione + isoxadifen did not reduce grain yield of tolerant field corn hybrids (Stephenson et al, 2015).…”

Section: Aboveground Biomass Plant Height and Grain Yieldmentioning

confidence: 79%

“…However, the four corn hybrids in that test are not adapted to the southeastern United States. A more recent study showed that crop safety can be improved when isoxadifen is included in ALS‐herbicide formulations (VanGessel et al, 2016). However, this improvement in crop safety was not consistent and only one sensitive hybrid and one tolerant hybrid were tested.…”

Section: Sulfonylurea/als Herbicides and The Crop Safener Isoxadifenmentioning

confidence: 99%

“…Previous research has suggested that combinations of thiencarbazone + tembotrione + isoxadifen, as well as rimsulfuron + isoxadifen, did not negatively impact corn yields on ALS‐tolerant corn hybrids (Stephenson et al, 2015; Manning et al, 2010). Recently, it was reported that isoxadifen could help reduce corn injury when used with the same ALS herbicides on sensitive hybrids, but this crop protection effect was not consistent over time (VanGessel et al, 2016). Our data suggest that growers who are seeking alternatives to atrazine, glyphosate, or glufosinate for weed control in field corn and are considering the use of nicosulfuron + rimsulfuron + isoxadifen (Steadfast Q) or tembotrione + thiencarbazone + isoxadifen (Capreno) need to weigh the potential risk of yield loss due to herbicide injury vs. yield loss caused by uncontrolled weeds before making a decision on using these specific herbicide formulations on ALS‐sensitive field corn hybrids.…”

Section: Practical Applicationsmentioning

confidence: 99%

“…At 26 DAT, both 1´ and 2´ rates nicosulfuron + rimsulfuron + isoxadifen and tembotrione + thiencarbazone isoxadifen reduced plant heights up to 3 inches compared with the NTC ( Table 3). Combinations of nicosulfuron + rimsulfuron and rimsulfuron applied with isoxadifen have been reported to cause significant injury to field corn (Doohan et al, 1998;VanGessel et al, 2016). Sweet corn hybrids have also shown reductions in height and yield when treated with nicosulfuron + rimsulfuron (O'Sullivan and Bouw, 1998).…”

Section: Plant Heightmentioning

confidence: 99%

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Commercial Safened ALS‐herbicide Formulation Effects on ALS‐sensitive Field Corn Hybrids

Carter

Prostko

Davis

2017

Crop Forage & Turfgrass Mgmt

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Core Ideas Corn hybrid sensitivity to ALS herbicides is an issue. Herbicide safeners may not provide complete crop safety. Growers who want to use safened ALS herbicides on sensitive corn hybrids must be aware of yield loss potential. Research was conducted in 2014 and 2015 to determine if two common commercial acetolactate synthase (ALS) inhibitor herbicide formulations, that contain the crop safener isoxadifen, could be used on field corn (Zea mays L.) hybrids with reported ALS sensitivity. Two ALS‐sensitive field corn hybrids (DEKALB DKC 62‐08 and DKC 64‐69) were treated 18 to 21 days after planting with nicosulfuron + rimsulfuron + isoxadifen or thiencarbazone + tembotrione + isoxadifen at 1× and 2× labeled rates. No interactions were observed between herbicide treatment and field corn hybrid. When averaged over herbicide treatment, DKC 62‐08 produced less aboveground biomass and was shorter in height than DKC 64‐69. However, no difference in grain yield between hybrids was observed. When averaged over corn hybrid, only the 2× rate of tembotrione + thiencarbazone methyl + isoxadifen caused a significant reduction (19%) in aboveground biomass. Nicosulfuron + rimsulfuron + isoxadifen and tembotrione + thiencarbazone + isoxadifen, at both 1× and 2× rates, reduced plant height up to 3 inches 26 days after treatment (DAT). However, only the 2× rates of these safened herbicides caused significant height reductions 62 DAT. Both herbicide formulations at 1× and 2× labeled rates caused corn yield losses of 11 to 16 bu/acre. These data suggest that these particular commercial herbicide formulations can cause crop injury and subsequent yield loss when used on ALS‐sensitive field corn hybrids.

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Herbicide safener isoxadifen‐ethyl associated with increased Goss's wilt severity in corn (Zea mays)

Haugrud,

Friskop,

Ikley

2024

Pest Management Science

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BACKGROUNDGoss's bacterial wilt and leaf blight (Goss's wilt), caused by the bacterium Clavibacter nebraskensis, is a corn disease that has been a top ten yield‐reducing disease in North America in the past 15 years. Isoxadifen‐ethyl is an herbicide safener that effectively increases cytochrome P450 activity in corn which enhances a plant's metabolism of herbicide molecules. Recent research found a potential link between isoxadifen‐ethyl and increased Goss's wilt severity.RESULTSThe application of isoxadifen‐ethyl increased (P = 0.014–0.046) area under disease progress curve (AUDPC) by 19%, 7%, and 9% at three environments, independent of accompanying herbicide or herbicide application timing. However, no significant differences in incidence of systemic wilt or corn grain yield occurred among treatments at any environment.CONCLUSIONThese data provide evidence for an association between isoxadifen‐ethyl safener and Goss's wilt in corn. The reason for this association is unknown, but the safener may affect plant or pathogen physiological mechanisms. While the increased disease severity did not result in decreased grain yield in these experiments, an increase in pathogen inoculum due to higher disease severity could influence Goss' wilt epidemics in future years. © 2024 Society of Chemical Industry.

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Evaluating Postemergence Herbicides, Safener, and Tolerant Hybrids for Corn Response

Cited by 11 publications

References 27 publications

Protective Responses Induced by Chiral 3-Dichloroacetyl Oxazolidine Safeners in Maize (Zea mays L.) and the Detoxification Mechanism

Protective Responses Induced by Chiral 3-Dichloroacetyl Oxazolidine Safeners in Maize (Zea mays L.) and the Detoxification Mechanism

Commercial Safened ALS‐herbicide Formulation Effects on ALS‐sensitive Field Corn Hybrids

Herbicide safener isoxadifen‐ethyl associated with increased Goss's wilt severity in corn (Zea mays)

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