WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, March 25, 2019


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Search results on 03/25/19

3559. Kennedy, A.C., F.L. Young, and A.G. Ogg. no date. Control of downy brome and jointed goatgrass using soil bacteria.. unpublished report, USDA-ARS, PUllman, WA 99164-6421.
Naturally occurring soil bacteria were isolated that inhibited the growth of downy brome and jointed goatgrass, but not winter wheat. Over 5000 isolates were examined, and more than 50% were inhibitory to one of the weeds in laboratory growth. In a field test, plant population and above ground growth of downy brome were reduced 31% and 53% respectively. The bacteria were active at cool temperatures, an advantage in suppressing the weed after fall emergence. The bacteria are viewed as an adjunct to herbicide control, as their suppression is not enough to prevent economic crop loss. However, the lack of available herbicides for goatgrass makes this potential control very important. Proper application methods to insure organism survival are yet to be worked out.

10776. Rydrych, D.J.. 1990. A summary of jointed goatgrass cultural and chemical control in wheat - 1990.. 1990 Columbia Basin Agricultural Research, Special Report 860, Corvallis, OR. p. 49-51.
Present herbicide options for controlling jointed goatgrass in wheat are not effective. Potential cultural controls include crop rotation, spring crops, perennial crops, double fallow, and field burning. The most effective cultural control is spring planted crops. Double fallow has provided 92% control without selective herbicides. Herbicides plus no-till have been 98% effective.

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