Abstract
Oilseed rape production is under pressure due to a limited availability of herbicides. Therefore, the performance in terms of management intensity (MI) and herbicide strategy (HS) and the involved yield formation was evaluated in a two-year Clearfield® oilseed rape field experiment. Furthermore, weed density and weed composition were also investigated. The variants of MI were standard sowing density (StS; seed rate: 50 seeds m−2, primary tillage: plow, row width: 12 cm), reduced sowing density (RD; seed rate: 25 seeds m−2, primary tillage: plow, row width: 50 cm), and strip-till (ST; seed rate: 25 seeds m−2, primary tillage: strip tillage, row width: 50 cm). The variants of HS were preemergence strategy (PES; application of dimethachlor, napropamide, clomazone in preemergence and application of prapaquizafop in postemergence) and Clearfield® strategy (CLS; application of imazamox, quinmerac in preemergence, no postemergence herbicide application). In the first year of the trial, there were no interactions between the factors in terms of grain yield. Grain yield in StS was 3.85 t and 5.2% significantly lower than in ST, and the value of RD was not significantly different from StS and ST. Grain yield in CLS was 3.7 t and 2.7% lower than in PES. In the second year of the trial, the grain yield in ST CLS was significantly lower, and there were no significant differences between the other variants. Higher weed emergence was observed in CLS RD (2.7 to 4 times higher weed density compared to PES RD) and CLS ST (2.8 to 4.5 times higher weed density compared to PES ST). No significant differences existed between StS PES and StS CLS in both trial years. The Clearfield® system offers significant advantages in the control of cruciferous weeds. Although these did not occur on the trial fields, the Clearfield® system in this study showed to be an alternative to the more common pre-emergence system, especially with regard to the parameter grain yield.
Highlights
Oilseed rape (OSR) plays an important role worldwide as a break and oilseed cash crop [1]
In reduced sowing density (RD), precision seeding was performed with 50 cm row spacing and a sowing density of 25 seeds m−2, after mouldboard ploughing at 25 cm
In 2015, the OSR grain yield ranged between 3.6 t ha−1 (ST CL) and 3.9 t ha−1 (StS preemergence strategy (PES); Figure 1, 2015)
Summary
Oilseed rape (OSR) plays an important role worldwide as a break and oilseed cash crop [1]. Herbicide strategies have been developed to secure the yield potential This is normally done by applying herbicides in different growth stages throughout the season, which can lead to up to three applications for certain crops. The herbicide contains an active agent of the chemical group Imidazolinones [9] and belongs to the herbicide class of acetolactate synthase inhibitors (ALS; HRAC class: B). It is applied as imazamox in the herbicide Clearfield® Vantiga® D in Germany (company: BASF, Germany). Non-CL OSR varieties would perish after an imidazolinone treatment [11]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
