Full TGIF Record # 195584
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Web URL(s):http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2011.pdf#page=88
    Last checked: 12/10/2013
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Content Type:Abstract or Summary only
Author(s):Curtis, Daniel W.; Hinds-Cook, Barbara J.; Hulting, Andrew G.; Mallory-Smith, Carol
Author Affiliation:Oregon State University, Cowallis, OR
Title:Alternative herbicides for diuron in carbon seeded perennial ryegrass (Lolium perenne) grown for seed
Meeting Info.:Albuquerque, NM: March 10-12, 2009
Source:Proceedings of the Western Society of Weed Science. Vol. 64, 2011, p. 88-89.
# of Pages:2
Publishing Information:Newark, CA: Western Society of Weed Science
Keywords:TIC Keywords: Application rates; Diuron; Herbicide injury; Herbicide trials; Indaziflam; Oregon State University; Poa annua; Pyroxasulfone; Rimsulfuron; Seed contamination
Abstract/Contents:"Annual bluegrass (Poa annua) contamination in grass grown for seed is a major production challenge to producers with significant economic ramifications. In Oregon, diuron applied preemergence over newly-planted seed rows protected with a narrow band of activated carbon 89 has been the standard production practice for the past three decades to control annual bluegrass. However, annual bluegrass has developed resistance to diuron in many grass seed fields in the Willamette Valley. Previous research by these authors has documented that indaziflam and pyroxasulfone can provide excellent annual bluegrass control with preemergence applications to carbon seeded perennial ryegrass. A study conducted in 2008-09 confirmed that pyroxasulfone applied at 50 g ai/ha could be used with the carbon seeding technique and produce seed yields statistically equivalent to a diuron standard. In 2009-10, a study with indaziflam applied at 32 g ai/ha provided excellent annual bluegrass control with acceptable crop safety. An industry study in 2009-10 indicated that rimsulfuron was effective for controlling annual bluegrass in perennial ryegrass and that the carbon seeding technique provided good crop safety. Therefore, in the fall of 2010, four studies were initiated with the objective of evaluating annual bluegrass control and perennial ryegrass injury resulting from inadaziflam, pyroxasulfone and rimsulfuron applied as preemergent broadcast applications over perennial ryegrass seeded with a 2.54 cm wide band of activated carbon applied at 336 kg/ha over the rows. Three studies are located at the Oregon State University Hyslop research farm near Corvallis, Oregon, and one study is located in a cooperator.s field near Jefferson, Oregon. All studies are randomized complete block designs with four replications. Initial results indicate that indaziflam applied at rates of 12 to 24 g ai/ha is controlling 92 to 97 % of the annual bluegrass with visual crop injury ratings of 10 to 35 %. Pyroxasulfone applied at rates of 25 to 100 g ai/ha is controlling 78 to 100 % of annual bluegrass with visual crop injury ratings ranging from 10 to 30 %. Rimsulfuron applied at rates ranging from 35 to 71g ai/ha is controlling 70 to 90 % of the annual bluegrass with crop injury ratings of 0 to 30 %. These studies suggest that the active ingredients, indaziflam, pyroxasulfone and rimsulfuron appear to provide adequate annual bluegrass control as well as crop safety necessary for replacement of diuron for annual bluegrass control in the carbon seeded perennial ryegrass production system. These four studies will be harvested and yields will be compared with diuron standard treatments included in the studies. Further experimentation will be conducted to refine application rates to minimize the potential for crop injury."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Curtis, D. W., B. J. Hinds-Cook, A. G. Hulting, and C. Mallory-Smith. 2011. Alternative herbicides for diuron in carbon seeded perennial ryegrass (Lolium perenne) grown for seed. Proc. West. Soc. Weed Sci. 64:p. 88-89.
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