Agronomy Library > Soil Conservation

Downy Brome Control in Direct Seeding Systems
Author: Rob Dunn and Bob Blackshaw
Date Created: December 06, 2004
Last Reviewed: December 06, 2004

Downy brome (Bromus tectorum L.) is a troublesome weed in winter wheat and fall rye because its life cycle is similar. Downy brome has a competitive advantage over fall-seeded crops; it has the ability to resume growth before fall seeded crops in early spring and to utilize soil moisture at shallow depths. Downy brome is also becoming an increasingly troublesome weed in minimum tillage systems. Also, it is very competitive in winter wheat, with densities of 50 – 100 plants m -1 emerging within three weeks of the crop. Such an infestation can reduce winter wheat yields by 30 – 40 per cent. Similar downy brome densities emerging in the spring, however, reduce yields by less than 10 per cent. Downy brome is less competitive with fall rye than winter wheat, but it has the potential to reduce rye yield in the range of 15 – 30% (Blackshaw 1993).

Click on the above pdf to download a detailed 3 page factsheet.