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Differential sensitivity of Echinochloa muricata and Echinochloa crus-galli to 4-hydroxyphenyl pyruvate dioxygenase- and acetolactate synthase-inhibiting herbicides in maize

Benny De Cauwer (UGent) , R Rombaut, Robert Bulcke (UGent) and Dirk Reheul (UGent)
(2012) WEED RESEARCH. 52(6). p.500-509
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Abstract
Echinochloa muricata var. microstachya (rough barnyard grass), an alien species native to North America, has gradually spread and is now locally naturalised and abundant in and around maize fields in Flanders (Belgium). One of the possible reasons for its expansion in maize fields might be a lower sensitivity to post-emergence herbicides acting against panicoid grasses, in particular those inhibiting 4-hydroxyphenyl pyruvate dioxygenase (HPPD) and acetolactate synthase (ALS). Doseresponse pot experiments were conducted in the glasshouse to evaluate the effectiveness of four foliar-applied HPPD-inhibiting herbicides (sulcotrione, mesotrione, topramezone and tembotrione) and the ALS-inhibiting herbicide nicosulphuron for controlling Belgian populations of Echinochloa crus-galli (barnyard grass) and E.similar to muricata. Herbicides were applied at the four-leaf stage (BBCH stage 14). Pre-emergence bioassays were included to evaluate soil activity of the HPPD inhibitors topramezone, sulcotrione and mesotrione. In another doseresponse pot experiment, the influence of growth stage at time of herbicide application on efficacy of topramezone for Echinochloa control was evaluated. Sensitivity to HPPD inhibitors topramezone and sulcotrione was significantly lower for E.similar to muricata populations than for E.similar to crus-galli populations. However, no differential sensitivity to nicosulfuron and the triketones tembotrione and mesotrione was found. Compared with E.similar to crus-galli, satisfactory post-emergence control of E.similar to muricata required 5- to 14-fold higher doses of topramezone and sulcotrione, as well as a more timely application. Compared with E.similar to crus-galli, sensitivity of E.similar to muricata to topramezone was more dependent on growth stage. Owing to the intragenus variability in sensitivity to HPPD-inhibitor herbicides, higher awareness of the presence of E.similar to muricata plants in maize fields is required.
Keywords
triketone, panicoid grasses, nicosulfuron, bioassay, growth stage, GENUS ECHINOCHLOA, HISTORY, WEEDS, herbicide sensitivity, maize, barnyard grass

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Citation

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Chicago
De Cauwer, Benny, R Rombaut, Robert Bulcke, and Dirk Reheul. 2012. “Differential Sensitivity of Echinochloa Muricata and Echinochloa Crus-galli to 4-hydroxyphenyl Pyruvate Dioxygenase- and Acetolactate Synthase-inhibiting Herbicides in Maize.” Weed Research 52 (6): 500–509.
APA
De Cauwer, Benny, Rombaut, R., Bulcke, R., & Reheul, D. (2012). Differential sensitivity of Echinochloa muricata and Echinochloa crus-galli to 4-hydroxyphenyl pyruvate dioxygenase- and acetolactate synthase-inhibiting herbicides in maize. WEED RESEARCH, 52(6), 500–509.
Vancouver
1.
De Cauwer B, Rombaut R, Bulcke R, Reheul D. Differential sensitivity of Echinochloa muricata and Echinochloa crus-galli to 4-hydroxyphenyl pyruvate dioxygenase- and acetolactate synthase-inhibiting herbicides in maize. WEED RESEARCH. 2012;52(6):500–9.
MLA
De Cauwer, Benny, R Rombaut, Robert Bulcke, et al. “Differential Sensitivity of Echinochloa Muricata and Echinochloa Crus-galli to 4-hydroxyphenyl Pyruvate Dioxygenase- and Acetolactate Synthase-inhibiting Herbicides in Maize.” WEED RESEARCH 52.6 (2012): 500–509. Print.
@article{3151494,
  abstract     = {Echinochloa muricata var. microstachya (rough barnyard grass), an alien species native to North America, has gradually spread and is now locally naturalised and abundant in and around maize fields in Flanders (Belgium). One of the possible reasons for its expansion in maize fields might be a lower sensitivity to post-emergence herbicides acting against panicoid grasses, in particular those inhibiting 4-hydroxyphenyl pyruvate dioxygenase (HPPD) and acetolactate synthase (ALS). Doseresponse pot experiments were conducted in the glasshouse to evaluate the effectiveness of four foliar-applied HPPD-inhibiting herbicides (sulcotrione, mesotrione, topramezone and tembotrione) and the ALS-inhibiting herbicide nicosulphuron for controlling Belgian populations of Echinochloa crus-galli (barnyard grass) and E.similar to muricata. Herbicides were applied at the four-leaf stage (BBCH stage 14). Pre-emergence bioassays were included to evaluate soil activity of the HPPD inhibitors topramezone, sulcotrione and mesotrione. In another doseresponse pot experiment, the influence of growth stage at time of herbicide application on efficacy of topramezone for Echinochloa control was evaluated. Sensitivity to HPPD inhibitors topramezone and sulcotrione was significantly lower for E.similar to muricata populations than for E.similar to crus-galli populations. However, no differential sensitivity to nicosulfuron and the triketones tembotrione and mesotrione was found. Compared with E.similar to crus-galli, satisfactory post-emergence control of E.similar to muricata required 5- to 14-fold higher doses of topramezone and sulcotrione, as well as a more timely application. Compared with E.similar to crus-galli, sensitivity of E.similar to muricata to topramezone was more dependent on growth stage. Owing to the intragenus variability in sensitivity to HPPD-inhibitor herbicides, higher awareness of the presence of E.similar to muricata plants in maize fields is required.},
  author       = {De Cauwer, Benny and Rombaut, R and Bulcke, Robert and Reheul, Dirk},
  issn         = {0043-1737},
  journal      = {WEED RESEARCH},
  keyword      = {triketone,panicoid grasses,nicosulfuron,bioassay,growth stage,GENUS ECHINOCHLOA,HISTORY,WEEDS,herbicide sensitivity,maize,barnyard grass},
  language     = {eng},
  number       = {6},
  pages        = {500--509},
  title        = {Differential sensitivity of Echinochloa muricata and Echinochloa crus-galli to 4-hydroxyphenyl pyruvate dioxygenase- and acetolactate synthase-inhibiting herbicides in maize},
  url          = {http://dx.doi.org/10.1111/j.1365-3180.2012.00944.x},
  volume       = {52},
  year         = {2012},
}

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