Interaction of herbicides with mepiquat chloride and prohexadione calcium in winter wheat
Wojciech Miziniak 1, A-C
Kinga Matysiak 2, D-F  
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Experimental Station, Institute of Plant Protection – National Research Institute, Poland
Department of Weed Science and Plant Protection Technique, Institute of Plant Protection – National Research Institute, Poland
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Kinga Matysiak   

Department of Weed Science and Plant Protection Technique, Institute of Plant Protection – National Research Institute, Władysława Wegorka, 60-318, Poznań, Poland
Online publication date: 2020-01-13
Submission date: 2019-06-26
Acceptance date: 2019-10-24
Journal of Plant Protection Research 2019;59(4):498–502
New solutions in plant protection applications are still highly desirable. Aiming at higher efficiency, environmental safety and profitability of production which, in addition to reducing the costs of the application of plant protection products, limits the destruction of soil structure combined use of agrochemicals seems to be one of the most important method in modern agriculture. In 2016 and 2017, the Plant Protection Institute – National Research Institute in Poznań, Poland, conducted field experiments on the possibility of combining two popular herbicides used to control monocotyledonous weeds: pinoxaden and fenoxaprop-P-ethyl, with a two-component plant growth and development regulator (mepiquat chloride and prohexadione calcium) on KWS Ozon winter wheat. The tested substances were applied at the BBCH 24 stage of winter wheat – herbicide only, and at the BBCH 31 stage – a mix of herbicides with a plant growth and development regulator. Regardless of the method of application of pinoxaden (herbicide only or mixed), high effectiveness of Apera spica-venti control was obtained in both years of the study. The mix of pinoxaden with mepiquat chloride and prohexadione calcium reduced the wheat crop height to a similar extent as separate application of the substances. The combined application of fenoxaprop-P-ethyl with mepiquat chloride improved the effectiveness of wheat crop height control. The method of application of the substances had no significant effect on winter wheat yield. Grain yields harvested from plots treated with the above substances were significantly higher than control only in the case of high weed infestation of winter wheat. The technological value of wheat grain depended on the year of study, while the method of application did not have a significant impact on the evaluated parameters.
The authors have declared that no conflict of interests exist.
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