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Volunteer Wheat (Triticum aestivum) in Newly Seeded Alfalfa (Medicago sativa L.)

Pablo M. Ott, Jean H. Dawson and Arnold P. Appleby
Weed Technology
Vol. 3, No. 2 (Apr. - Jun., 1989), pp. 375-380
Stable URL: http://www.jstor.org/stable/3986953
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Volunteer Wheat (Triticum aestivum) in Newly Seeded Alfalfa (Medicago sativa L.)
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Abstract

Wheat that emerged with alfalfa seeded in the field in late August grew for 20 days after planting without suppressing the alfalfa but reduced yields if allowed to grow with alfalfa for 30 or more days. Uncontrolled wheat reduced the first cutting yield of alfalfa by 80% or more. Sethoxydim at 0.4 kg ai/ha, fluazifop at 0.2 kg ai/ha, and haloxyfop at 0.2 kg ai/ha controlled wheat selectively in alfalfa. Herbicides applied 20 days after seeding protected alfalfa from suppression by wheat. Control of wheat was equal when herbicides were applied 30 days after seeding, but in 1 of 2 yr, the wheat had suppressed the alfalfa enough to reduce yields the following May.

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