Julius-Kühn-Archiv (Mar 2012)

Effective control of loose silky-bent (Apera spica-venti (L.) P.B.) in winter cereals using highly efficacious herbicide treatments. Results of comparative trials in the federal states Brandenburg, Hessen, Saxony, Saxony-Anhalt and Thuringia from 2001 to 2011

  • Schröder, Gerhard,
  • Meinlschmidt, Ewa,
  • Balgheim, Rolf,
  • Bergmann, Elke,
  • Gößner, Katrin

DOI
https://doi.org/10.5073/jka.2012.434.037
Journal volume & issue
no. 434
pp. 301 – 312

Abstract

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In recent years, an increasing occurrence of resistance to Apera spica-venti, especially to ALS inhibitors and partially to ACCase inhibitors has been reported for the new federal states, too. The dominance of winter wheat and winter rape in crop rotations associated with a unilateral application of herbicides has increased the selection pressure. In order to counter further spread of herbicide resistance, the right choice of the mode of action of the herbicide or herbicide combination and highly efficacious herbicide treatments are the methods of choice, of course in addition to the agronomic aspects, such as sowing date and crop rotation. The research determined how and to what extent dicotyledonous weeds are associated with loose silkybentgrass. Based on the results, single herbicides or herbicide tank mixes were tested to achieve the expected level of control. As a result, treatments which have achieved very high level of control against A. spica-venti and the most common dicotyledonous weeds can be recommended. A total of 191 trial sites have been included in the analysis of A. spica-venti. Using the HRAC-classification of herbicides used, groups were formed which might contribute to solving problems specifically linked to the detected resistance situation of the site. In the autumn, flufenacet-containing herbicides, such as Malibu (flufenacet, pendimethalin), Herold SC (flufenacet, diflufenican), Bacara Forte (flufenacet, flurtamone, diflufenican), Carmina 640 (chlortoluron, diflufenican) and Fenikan (isoproturon, diflufenican) demonstrated high efficiency against A. spica-venti. Combinations of herbicides with the HRAC classification of N and E provide further opportunities for the implementation of anti-resistance management strategies, such as Sumimax + Ciral (flumioxazin + metsulfuron, flupyrsulfuron) or Boxer (prosulfocarb) + Diflanil 500 SC (diflufenican) or Beflex (beflubutamid). When applied in spring, significant differences concerning the efficiency and robustness of sulfonylureas for the control of A. spica-venti were observed.

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