Full TGIF Record # 82861
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Web URL(s):http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2002.pdf#page=75
    Last checked: 12/10/2013
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Cole, Charles M.; Mallory-Smith, Carol; Bill, Brewster D.; Paul, Hendrickson E.
Author Affiliation:Cole: Faculty Research Assistant, Oregon State University, Corvallis, OR; Mallory-Smith: Associate Professor, Oregon State University, Corvallis, OR; Bill: Senior Instructor, Oregon State University, Corvallis, OR; and Paul: Faculty Research Assistant, North Dakota State University, Fargo, ND.
Title:Perennial ryegrass response to repeated annual diuron applications
Section:Weeds of agronomic crops (project 3)
Other records with the "Weeds of agronomic crops (project 3)" Section
Meeting Info.:Coeur D'Alene, ID: March 12-15, 2001
Source:Proceedings of the Western Society of Weed Science. Vol. 55, March 2002, p. 64.
# of Pages:1
Publishing Information:Newark, CA: Western Society of Weed Science
Keywords:TIC Keywords: Lolium perenne; Herbicides; Herbicide application; Pesticide persistence; Pesticide residues; Preemergence herbicides; Application rates; Diuron; Metabolites; Seed yield; Soil analysis
Cultivar Names:Linn; Affinity
Abstract/Contents:"Perennial ryegrass stand decline, or dieback, is a problem that western Oregon seed growers have been dealing with for years. Research has found no relationship between stand decline and disease, insect pests, or nematodes. Herbicide usage may contribute to stand decline because several herbicides are commonly applied each year to maintain crop seed purity. Research was conducted to study the impact of diuron in perennial ryegrass seed production because it is used almost universally among western Oregon seed growers and is fairly persistent in the soil. There are numerous ryegrass cultivars that are produced in Oregon, and the possibility exists for differences in decline among cultivars. A multiple-year study was initiated in 1997 to evaluate the effects of repeated diuron applications on perennial ryegrass ryegrass growth and to measure the soil accumulation of residual diuron and the herbicidal metabolic DCPMU. "Linn" and "Affinity" perennial ryegrass cultivars were carbon-seeded, a technique that allows a pre-emergence broadcast application of diuron. Treatments were: 1) diuron applied at 2.4 lb/A in 1997 with no subsequent treatments; and 2) diuron applied at 2.4 lb/A in 1997 followed by annual applications of diuron at 1.2 lb/A in 1998, 1999, and 2000. Soil samples were collected each year prior to the diuron application in the fall. Perennial ryegrass seed yield was measured each year. The repeated annual diuron treatments caused considerable injury to the ryegrass and a reduction in seed yield was observed in both cultivars in 2001. Soil analysis performed in 2001 recovered 13% of the initial single 2.4 lb/A diuron application from 1997 and 22% of the 6 lb/A from the repeated annual diuron applications."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cole, C. M., C. Mallory-Smith, B. D. Bill, and H. E. Paul. 2002. Perennial ryegrass response to repeated annual diuron applications. Proc. West. Soc. Weed Sci. 55:p. 64.
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    Last checked: 12/10/2013
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    Notes: Item is within a single large file
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MSU catalog number: SB 610 .W43 v.49
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