Efficiency of Some Post Emergence Acetyl Coenzyme A Carboxylase-Inhibitor Herbicides Against Certain Grassy Weeds in Canola Fields | ||||
| Egyptian Academic Journal of Biological Sciences, H. Botany | ||||
| Article 6, Volume 8, Issue 2, December 2017, Page 49-58 PDF (693.18 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsh.2017.16767 | ||||
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| Author | ||||
| Ibrahim A. Mohamed | ||||
| Plant Protection Department, Faculty of Agriculture, Assiut University, Assiut, Egypt | ||||
| Abstract | ||||
| Two field experiments were conducted in Plant Protection Department Farm, Faculty of Agriculture, Assiut University, Egypt during 2014/2015 and 2015/2016 winter seasons to evaluate the efficacy of five ACCase-inhbitors (fenoxaprop-p-ethyl, quizalofop-p-ethyl, clethodim, clodinafop+pinoxaden and tralkoxydim), addition toflucarbazone-sodium as ALS-inhibitor herbicides and hand hoeing against two noxious grassy weeds,i.e.Avenafatua L. and Phalaris minor Retz. in canola fields. Results showed that all ACCase- and ALS- inhibitor herbicides and hand hoeing treatments performed effectively against both A. fatua and P. minorweed species and achieved to significance high fresh weight reduction of the individual and total grass weeds than unweeded check after 30 days of treatments. The reduction in fresh weight were ranged from 92.9 to 98.9 % for P. minor and 95.5 to 99.7% for A. fatua as well as 93.8 to 99.1 for total grass weeds versus weedy check during 2014/2015 and it were ranged 88.0 to 98.4% for P. minor, 91.8 to 99.8 for A. fatua and 89.3 to 98.7% for total grass weeds during 2015/2016 season. However, concerning the effect on canolaflucarbazone-sodium completely killed canola plants after 30 days of the application thus it should not be used to control grassy weeds in canola fields. Meanwhile, clethodim and clodinafop+pinoxaden exhibited slight phytotoxicity on canola plants but they did not continue to cause any reduction in canola seed yield per feddan and other tested herbicides, fenoxaprop-p-ethyl, quizalofop-p-ethyl and tralkoxydim did not cause any phytotoxicity on canola plants after treatments. Concerning canola seed yield, all tested ACCase-inhibitors particularly tralkoxydim and hand hoeing treatments increased seed yield per feddan of canola as compared with weedy check which had lowest yield in both seasons. The percent of canola seed yield increment ranged from 4.1 to 39.8% during 2014/2015 and from 51.7 to 73.3% during 2015/2016 compared to control.According to this study, tralkoxydim could be used to control the grass weeds as it showed a high performance than other ACCase-inhibitor herbicides and hand hoeing versus weedy check as well as increased the final yield. | ||||
| Keywords | ||||
| ACCase-inhibitors; canola; flucarbazone-sodium; grass weeds; herbicides | ||||
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