Bijeenkomst: EGF2015
Auteur: Cougnon M., George T. and Reheul D.
ISBN: 978-9090-289-61-8
Jaar van uitgifte: 2015
Producttype: Paper
Grass cover crops installed following the harvest of forage maize often develop poorly due to the late sowing date. Undersowing of grasses is an alternative, provided the undersown grass does not compete too much with the maize crop. This trial evaluated the competition of undersown tall fescue (Festuca arundinacea Schreb.) in forage maize. Differences in competition were obtained by using 6 contrasting herbicide treatments that affected tall fescue differently. The yield of forage maize without undersown grass (control: 21,688 kg DM ha‑1) was significantly higher compared to maize with undersown grass that was not inhibited by herbicides (17,887 kg DM ha‑1). A significant negative relationship was found between the maize yield and the grass biomass after maize harvest. At the beginning of the winter, the biomass of Italian ryegrass sown immediately after the maize harvest was at the same level of the undersown tall fescue. Our results indicate the necessity using the right herbicide treatment to combine good maize yields with the benefits of the undersown grass.
herbicides
Controlling docks (Rumex obtusifolius L.) using herbicides applied to seedling or established grassland
Bijeenkomst: EGF2015
Auteur: O’Donovan T., Casey I.A. and Humphreys J.
ISBN: 978-9090-289-61-8
Jaar van uitgifte: 2015
Producttype: Paper
Docks are a widespread problem associated with intensively managed grassland. The experimental site was reseeded with perennial ryegrass in October 2009. A plot experiment (plots of 5m × 10m) was laid down in a randomised complete block design with nine treatments and eight replicates. Four treatments were each of four herbicides: (1) Linuron + 2,4-DB + MCPA; (2) MCPA + 2,4-DB; (3) CMPP; (4) Fluroxypyr + Triclopyr) applied at the seedling stage (SSH) in April 2010 and another four treatments (5) Amidosulfuron; (6) thifensulfuron; (7) Fluroxypyr + Triclopyr, and (8) Aminopyralid + Fluroxypyr) applied to established grassland (EGH) in April 2012. The ninth was an untreated control. Dock numbers and herbage production were measured over five years (2010-2014). SSH gave more (P