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Distribution, importance and control of Bromus species in the Middle West of Germany

Summary
The complete article is written in German
Bromus species are important weeds in arable crops. Due to the increase of reduce tillage systems and larger areas of winter oilseed rape and winter wheat there is still a small increase of Bromus sp. However, even if the plough is used year by year occurrence of Bromus may not be avoided. Bromus sterilis is the most important species, but combination the other Bromus sp. can often be observed. The distribution in the field shows that Bromus is mainly a problem of the field margins. However, even all other possible distribution forms can also be observed. The coverage of the whole field is rare. In these cases often other reasons like contaminated crop seeds are involved. There are no regional borders for the occurrence of Bromus. Main arable regions showed a higher and regions with higher altitude above sea level showed a lower infestation with these weeds.
If a field is stronger infested farmers started with control activities. Management of field margins, intensification of stubble tillage (incl. use of glyphosate) and the additional use of selective gramicides are of importance. The use of special ALS-inhibitors for control of Bromus often is not as good as expected. More experience and recommendation are needed to improve the efficacy of these herbicides.

german version

Keywords/Stichworte:ALS-Inhibitors; reduced soil tillage; Bromus sterilis ; B. commutatus ; B. mollis ; B. secalinus

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Autor:J. PETERSEN, Fachhochschule Bingen, Fachrichtung Agrarwirtschaft, Berlinstr. 109, 55411 Bingen, E-Mail: petersen@fh-bingen.de

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