Controlling Dinitroaniline-Resistant Goosegrass (<i>Eleusine indica</i>) in Turfgrass

Breeden, Shane M.; Brosnan, James T.; Breeden, Gregory K.; Vargas, José J.; Eichberger, Gregor; Tresch, Stefan; Laforest, Martin

doi:10.1017/wet.2017.57

Cited by 19 publications

(23 citation statements)

References 18 publications

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“…The injury by topramezone alone noted in the present study is supported by previous research. Breeden et al (2017) noted turfgrass injury for nonirrigated topramezone alone of 34% (1 WAT), 43% (2 WAT), and 1% (4 WAT). In Table 6.…”

Section: Resultsmentioning

confidence: 98%

Goosegrass Control and Turfgrass Injury Following Metribuzin and Topramezone Application with Immediate Irrigation

Kerr¹,

McCarty²,

Cutulle³

et al. 2019

horts

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Goosegrass (Eleusine indica L. Gaertn.) is a problematic C4 weedy grass species, occurring in the warmer regions of the world where it is difficult to selectively control without injuring the turfgrass. Furthermore, control efficacy is affected by plant maturity. End-user options for satisfactory goosegrass control has decreased; thus, the need for developing management techniques to improve the selectivity of POST goosegrass control options in turfgrass systems is ever increasing. One possible means of providing control, yet maintaining turf quality is immediately incorporating applied products via irrigation. Greenhouse and field trials were conducted in Pickens County, SC, with the objectives of 1) evaluating turfgrass injury following use of POST goosegrass control options; 2) assessing if irrigating (0.6 cm) immediately following the herbicide application reduces injury of ‘Tifway 419’ bermudagrass [Cynodon dactylon (L.) Pers. × Cynodon transvaalensis Burtt-Davy]; and 3) determining if immediate irrigation influences goosegrass control at one- to three-tiller and mature growth stage. Following the application of herbicide treatments, irrigation was applied (+) or not applied (−). Treatments included the following: control (+/− irrigation); topramezone at 12.3 g a.i./ha (+/− irrigation); metribuzin at 420 g a.i./ha (+/− irrigation); and topramezone plus metribuzin (+/− irrigation) at 12.3 and 420 g a.i./ha. Irrigation treatment had minimum effect on greenhouse-grown goosegrass biomass, all treatments provided >85% control of 1- to 3-tiller goosegrass plants. However, control for mature plants was <50% for topramezone- and 60% to 70% for metribuzin-containing treatments. In field studies, at 1 week after treatment (WAT), the irrigated metribuzin and topramezone plus metribuzin had ≈37% and ≈16%, respectively, less goosegrass control vs. nonirrigated treatments. At 2WAT, irrigated metribuzin and irrigated topramezone plus metribuzin–treated plots, had ≈50% less mature goosegrass control vs. nonirrigated treatments. Irrigated herbicide treatments, however, experienced ≈23% less turfgrass injury at this time. At 4 WAT, irrigated metribuzin- and irrigated topramezone plus metribuzin–treated plots experienced reduced mature goosegrass control by ≈65% and ≈59%, respectively. Overall, incorporating POST herbicide applications via 0.6 cm of irrigation reduced turfgrass injury by at least 20% for all herbicide treatments, while maintaining goosegrass control.

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Section: Resultsmentioning

confidence: 98%

Goosegrass Control and Turfgrass Injury Following Metribuzin and Topramezone Application with Immediate Irrigation

Kerr¹,

McCarty²,

Cutulle³

et al. 2019

horts

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“…In cases documented so far, α‐tubulin mutations identified in resistant weeds were either in a homozygous state or co‐occurred as two different resistance‐endowing tubulin mutations. For example, homozygous Thr‐239‐Ile mutations were reported in S. viridis , E. indica and L. rigidum , while the Val‐202‐Phe mutation together with the Leu‐125‐Met or Leu‐136‐Phe were reported in A. aequalis , and Val‐202‐Phe with Thr‐239‐Ile in L. rigidum . It seems that more than one mutant tubulin allele or gene copies are required for dinitroaniline resistance, and this is also true in the current study, where only the homozygous Val‐202‐Phe mutant plants were resistant to dinitroaniline herbicides.…”

Section: Discussionmentioning

confidence: 99%

A Val‐202‐Phe α‐tubulin mutation and enhanced metabolism confer dinitroaniline resistance in a single Lolium rigidum population

Chen

Chu

Han

et al. 2019

Pest Management Science

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BACKGROUND: A Lolium rigidum population collected from Western Australia was previously reported as highly resistant to dinitroaniline herbicides mainly due to a Val-202-Phe substitution in the target site -tubulin protein. To further determine the contribution of the 202 mutation to resistance, two sub-populations, respectively comprising the 202 mutant and wild-type (WT) individuals, were isolated from within the same resistant population and subject to dinitroaniline herbicide doses. A rice transgenic study was conducted to demonstrate whether the amino acid substitution at the 202 residue confers resistance. In addition, as indicated in the phenotyping and genotyping study, non-target enhanced trifluralin metabolism was further examined in the same population. RESULTS: The 202 mutants were more resistant than the wild-type plants. Rice calli transformed with the L. rigidum mutant -tubulin gene (Val-202-Phe) were more resistant to dinitroaniline herbicides relative to calli transformed with the wild-type gene. Also, enhanced trifluralin metabolism was detected in the 202 mutants in comparison to the susceptible seedlings. CONLCUSION: Both target-site Val-202-Phe -tubulin mutation and non-target-site enhanced trifluralin metabolism co-exist in this dinitroaniline-resistant L. rigidum population.

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“…36 So far, targetsite DNA resistance has been confirmed only in few weed species. For example, a single mutation in an ⊍-tubulin gene resulted in trifluralin resistance in Eleusine indica (Thr-239-Ile and Met-268-Thr), [39][40][41] Setaria viridis (Leu-136-Phe and Thr-239-Ile) 23 and Alopecurus aequalis (Val-202-Phe and Leu-125-Met/Leu-136-Phe). 22 Recently, in L. rigidum, two of the known mutations, Val-202-Phe and Thr-239-Ile, along with novel mutations Arg-243-Lys and Arg-243-Met have been reported to confer DNA herbicide resistance in Australia.…”

Section: Discussionmentioning

confidence: 99%

Cross and multiple herbicide resistance in annual bluegrass (Poa annua) populations from eastern Texas golf courses

Singh

Reis

Reynolds

et al. 2020

Pest Management Science

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BACKGROUND Annual bluegrass is a troublesome weed in managed turf systems. A survey was conducted to evaluate the prevalence of herbicide resistance in golf course populations of annual bluegrass in eastern Texas. Screenings were conducted for two photosystem II (PS II)‐inhibitor herbicides [simazine preemergence (PRE), amicarbazone postemergence (POST)], two acetolactate synthase (ALS) inhibitors (foramsulfuron POST, trifloxysulfuron POST) and one microtubule assembly inhibitor (pronamide PRE/POST). RESULTS Ninety percent of the populations were found to be resistant to at least one of the tested herbicides. The TX15‐14 population was >490‐, 178‐, 10‐, 26‐, 4.3‐ and 3.8‐fold, and the TX15‐27 population was >490‐, 16‐, 28‐, 84‐, 5.2‐ and 4.1‐fold less sensitive to simazine, amicarbazone, foramsulfuron, trifloxysulfuron, pronamide POST and pronamide PRE, respectively, compared to the susceptible standard TX15‐SUS. Populations resistant to pronamide POST were completely controlled by pronamide PRE at the label recommended rate. The ALS and psbA gene sequence analysis indicated the presence of target site mutations (Ser‐264‐Gly in the psbA gene of TX15‐14 and Trp‐574‐Leu in the ALS gene of TX15‐27). However, given the absence of any target‐site mutation in the ALS gene of TX15‐14, the psbA gene of TX15‐27 and α‐tubulin of both populations, nontarget site mechanisms of resistance are suspected. CONCLUSION This is the first case of multiple herbicide resistance in annual bluegrass populations to three herbicide modes of action. Results show the widespread occurrence of multiple herbicide resistance in golf course annual bluegrass populations in eastern Texas and emphasize the need for the development and implementation of effective resistance management practices. © 2020 Society of Chemical Industry

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Controlling Dinitroaniline-Resistant Goosegrass (Eleusine indica) in Turfgrass

Cited by 19 publications

References 18 publications

Goosegrass Control and Turfgrass Injury Following Metribuzin and Topramezone Application with Immediate Irrigation

Goosegrass Control and Turfgrass Injury Following Metribuzin and Topramezone Application with Immediate Irrigation

A Val‐202‐Phe α‐tubulin mutation and enhanced metabolism confer dinitroaniline resistance in a single Lolium rigidum population

Cross and multiple herbicide resistance in annual bluegrass (Poa annua) populations from eastern Texas golf courses

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