WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, February 18, 2019

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Search results on 02/18/19

2809. Hume, L.. 1982. The long-term effects of fertilizer application and three rotations on weed communities in wheat.. Can. J. Plant Sci., 62:741-750.
The effect of fertilizer application and three rotations (continuous cropping, fallow-wheat, and fallow-wheat-wheat rotations)on the species composition of the weed community was examined using rotations that had been running for 21-22 yrs. Fertilizer application tended to reduce community differences between continuous cropping and short-term wheat-fallow rotations. With the use of 2- or 3-yr wheat-fallow rotations and herbicide application, weed problems can be minimized in southeastern Saskatchewan.

3021. Swan, D.G.. 1983. Weed control in winter wheat.. WSU Extension Service, Ext. Bull. #599.
Keep the problem from occurring. Use crop rotation, especially a spring crop, to upset the weed species cycle. Eradicate all new weed species before they spread. Keep weeds from producing seed in the field.

3029. Swan, D.G.. 1972. Weed control in winter wheat in eastern Washington.. Proc. 11th Br. Weed Control Conf., vol.2, p.681.
Bromoxynil, while less effective on some weed species, was the most selective herbicide. Diuron, linuron, and terbutryne frequently reduced yields on soils with less than 1.5% organic matter.

7753. Young, Frank. 1989. Integrated pest management project update.. Paper presented at WA state weed conference, Nov. 13,1989.
This paper briefly describes the IPM weed study underway near Pullman, WA. This experiment uses field size plots for several rotation, tillage, and weed control treatments. Four years of research have been completed. Generally, the yield of spring cereals has not been affected by either weed management levels or tillage systems. Yields of spring peas were 17% greater with maximum weed management compared to the minimum level. Only three of the minimum tillage systems left sufficient residue cover to meet the 30% SCS requirement. However, all reduced tillage systems left more than 30% residue during the critical winter months. Yields of peas under conservation tillage were 13% greater than with conventional tillage, indicating the ability to reduce erosion potential with this crop and not suffer a yield penalty. No-till seeding has been successful either after spring wheat or spring peas, but not after the high residue of winter wheat.

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