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PNW Downy Brome Management Guide Available
AManaging Downy Brome under Conservation Tillage Systems in the Inland Northwest Cropping Region,@ was published as Pacific Northwest Extension Bulletin PNW0509. This 15-page color publication is a revision of Conservation Tillage Handbook Series No. 15 (similar title) in Chapter 5, which was published in 1994. This new publication was developed by a team of Northwest coauthors including: Joe Yenish - WSU, Roger Veseth - WSU/UI; Alex Ogg - formerly USDA-ARS, Donn Thill - UI, Dan Ball - OSU, Frank Young - ARS, Eric Gallandt - WSU, Don Morishita - UI, Carol Mallory-Smith - OSU, Don Wysocki - OSU, and Tom Gohlke - NRCS. This publication provides an overview of the weed biology and strategies for reducing the soil seed bank in conservation tillage systems. It reviews two management strategies: 1) "Maintenance" control strategies to control a light to moderate downy brome infestation which caused minimal crop yield loss; and 2) "Reclamation" control strategies which include a temporary change in crop rotation to recover from a dense infestation of downy brome which caused substantial yield loss, or may reduce future yield potential to near crop failure levels. Key management goals in both strategies are to: 1) facilitate seed germination, since the seed is relatively short-lived in the soil -- generally not more than 2 years; 2) prevent seed production in fallow with early control; and 3) minimize seed production in crop through selection and timing of various cultural and chemical options. Copies of this PNW Extension bulletin are available for $4.50 through county extension offices in applicable dryland areas of the Pacific Northwest. You can also order them directly from the state extension publication offices: ID (208) 885-7982; OR (541) 737-2513; WA (509) 335-2999. |
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us: Hans Kok, (208)885-5971
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Downy brome (Bromus tectorum),
commonly called cheatgrass, has been a major weed in winter wheat in the
Pacific Northwest for decades. It is generally more of a problem in low
rainfall areas in the winter wheat-fallow rotation, but can also cause
significant yield losses under two-year annual cropping rotations in higher
precipitation zones. Although downy brome can be a problem regardless
of tillage system used, it can be particularly troublesome under conservation
tillage systems unless effective weed management strategies are implemented.
A new Northwest Extension publication is available to growers and farm
advisor to help them develop effective management strategies in conservation
tillage systems.