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Downy Brome Control on Dryland Winter Wheat with Stubble-Mulch Fallow and Seeding Management

Massee, T.W. (1976) Downy Brome Control on Dryland Winter Wheat with Stubble-Mulch Fallow and Seeding Management. Agronomy Journal. 68(6):952-955.

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Differences in downy brome (Bromus tectorum L.) control
had been observed under field conditions of eastern
Idaho when dates of stubble-mulch tillage, final rod
weeding, and winter wheat (Triticum aestivum L.) planting
were varied. This field-plot experiment on Tetonia
silt loam (Pachic Cryoboroll-coarse, silty, mixed) tested
the degree of downy brome control obtained with three
initial stubble-mulch tillage dates, two final rod weeding
dates, and three winter wheat planting dates.

Downy brome was best controlled with a combination
of initial tilling early in the spring and a final rod weeding
just before the late (15 September) wheat planting
date. The early tillage killed downy brome before they
produced seed. This also resulted in sufficient soil moisture
retention in the seed zone for fall germination of
other downy brome seeds, which were then killed by the
final rod weeding just before the late wheat planting.

A reduction in natural downy brome emergence was
observed at later fall dates. This was confirmed in a
separate field.plot experiment (Portneuf silt loam, Xerollic
Calciorthid, coarse, silty, mixed) where downy brome
seed was planted at several dates, and helped explain some
of the benefits of the mentioned late rod weeding and
planting treatment.

These procedures incorporating stubble-mulch fallow
are recommended, as normally practiced moldboard plowing
creates an erosion hazard.

Item Type: Article
NWISRL Publication Number: 0365
Subjects: Dryland crops > Small grain
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:51
Last Modified: 09 Feb 2017 18:31
Item ID: 312