WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Sunday, June 24, 2018

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Search results on 06/24/18

2006. Forcella, F.. 1986. Timing of weed control in no-tillage wheat crops.. Agron. J., 78:523-526.
A 2-yr study of the timing of wheat/weed interference was initiated in southwestern Australia. Weeds were controlled either manually or chemically at various stages of crop growth. In all cases, wheat/weed competition increased when soil temperature exceeded 10 degrees C and resulted in rapid depletions of available N.

1493. Cuthbertson, E.G.. 1969. Chondrilla juncea in Australia. 2. Preplanting weed control and wheat production.. Aust. J. Exp. Agric. Anim. Husb., 9:27-36.
Both lucerne and subterranean clover reduced skeletonweed populations significantly. The yield response comes from the temporary removal of the weed in the presowing period, rather than from the longer term reduction in weed cover. The response on plots with low weed density was not economic. Early suppression of the weed by any means increases grain yield. Critical density would be about 20% ground cover. My experience is that 30% groundcover generally warrants herbicide application. At lower densities, cultivation is more satisfactory.

2181. Gill, G.S. and W.M. Blacklow. 1984. Effect of Great Brome (Bromus diandrus Roth.) on the growth of wheat.. Aust. J. Agric. Res., 35:1-8.
Studied competition between wheat and great brome. Competition with great brome reduced the concentration of nitrogen and phosphorous in wheat shoots. The reduction suggested that great brome competed with wheat for absorption of nitrogen and phosphorous. Competition with great brome also resulted in significant reduction in the grain yield. Reduction in mass per grain was probably due to competition with great brome for water during grain-filling.

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