Full TGIF Record # 162820
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Web URL(s):http://www.newss.org/proceedings/proceedings_2010.pdf#page=89
    Last checked: 07/22/2013
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Content Type:Abstract or Summary only
Author(s):Mansue, C.; Hart, S.
Author Affiliation:Rutgers University, New Brunswick, NJ
Title:Broadleaf weed control and cool-season turfgrass safety with aminocyclopyrachlor applied on a fertilizer granular
Meeting Info.:Cambridge, MA: January 4-7, 2010
Source:Proceedings: 64th Annual Meeting of the NortheasternWeed Science Society. Vol. 64, 2010, p. 73-74.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:2
Keywords:TIC Keywords: 2,4-D + Mecoprop; 2,4-D + Mecoprop + Dicamba; Aminocyclopyrachlor; Fertilizer evaluation; Fertilizer grade; Fertilizer-herbicide combinations; Granular fertilizers; Weed control
Abstract/Contents:"Field studies were conducted from 2007 to 2009 to evaluate aminocyclopyrachlor applied as a fertilizer granule for broadleaf weed control on unimproved sites with mixed stands of weeds and turfgrass species. Cool-season turfgrass tolerance studies were also conducted on highly maintained stands of individual turfgrass species. Standard dry (2,4-D + MCPP) and spray (2,4-D + MCPP + dicamba) treatments were included in each study for comparison. All fertilizer treatments were applied by hand to dry foliage with a shaker can to plots that were 1.5 by 3 m for weed control trials and 0.9 by 3 m for turf tolerance trials. Experimental design was a randomized complete block with 4 replications. Plots were visually evaluated at 1 and 2 weeks after treatment (WAT) and quantitatively evaluated by weed counts at 4 and 8 WAT. In 2007, an experiment to evaluate winter annual broadleaf weed control was established on 4-26 with application rates of aminocyclopyrachlor ranging from 0.08 to 0.2 kg ai/ha. Significant herbicidal activity was not evident until 4 WAT by which time henbit and common chickweed had completely dissipated from the experiment. At 8 WAT, aminocyclopyrachlor at 0.1 kg/ha provided nearly complete control of veronica and mouseear chickweed at while standard treatments failed to control either species. A second study was initiated on 5-15 to evaluate white clover and buckhorn plantain control. Significant herbicide activity was not evident until 2 WAT but neither species was completely controlled. At 4 WAT, white clover control was nearly complete with all aminocyclopyrachlor treatments. At 8 WAT, white clover control was complete with all aminocyclopyrachlor treatments but rates of 0.16 to 0.2 kg/ha required for 85% or greater buckhorn plantain control. Standard dry treatment of 2,4-D + MCPP failed to control either species. A winter annual broadleaf weed control study was initiated on 4-22 in 2008 with application rates of aminocyclopyrachlor ranging from 0.03 to 0.1 kg/ha. Significant herbicidal activity was not evident until 8 WAT by which time henbit had completely dissipated from the experiment. At 8 WAT, aminocyclopyrachlor at 0.03 kg/ha provided nearly complete control of common chickweed. However, applications rates of 0.08 and 0.1 kg/ha were required for significant control of mouseear chickweed and veronica, respectively. Standard treatments failed to control either species. Two additional studies were initiated on 5-14 to evaluated buckhorn and broadleaf plantain as well as and black medic control. Significant herbicide activity was not evident until 4 WAT. Aminocyclopyrachlor application rates of 0.03 kg/ha provided complete control of black medic but rates of 0.08 to 0.1 kg/ha required for significant levels of buckhorn and broadleaf plantain control. In studies conducted in 2009, aminocyclopyrachlor continued to demonstrate exceptional white clover control as well as significant activity on dandelion. Buckhorn and broadleaf plantain were more tolerant to aminocyclopyrachlor but acceptable control could be obtained depending on application rate. In 2007, turfgrass tolerance studies were initiated on 6-27 evaluated aminocyclopyrachlor applied at 0.17, 0.34, or 0.68 kg/ha as a fertilizer granule or spray treatment to dry foliage. Kentucky bluegrass, perennial ryegrass and tall fescue were tolerant of 0.3 kg/ha of aminocyclopyrachlor applied as a fertilizer granule. However, Kentucky bluegrass and tall fescue were injured by 21 and 16%, respectively, at 8 WAT by .68 kg/ha. Spray treatments at any rate caused no significant injury on any of these species. In contrast, fine fescue injury was evident within 2 WAT at 0.34 and 0.68 kg/ha of aminocyclopyrachlor applied as a fertilized granule and injury persisted throughout the growing season. Fine fescue injury was greatest at 4 WAT ranging from 41 to 61% and 29 to 46% with aminocyclopyrachlor applied at 0.34 or 0.68 kg/ha as a fertilizer granule or spray, respectively. In 2008, studies were conducted on Kentucky bluegrass and fine fescue only. Aminocyclopyrachlor as applied at 0.08, 0.17 and 0.34 kg/ha, respectively, at 8 WAT. Injury from aminocyclopyrachlor applied at 0.34 kg/ha persisted and was 18 and 30% respectively, at 12 and 16 WAT. Similar injury trends were observed on fine fescue in 2008 as were observed in 2007. Injury was evident at 4 WAT from aminocyclopyrachlor applied at 0.17 or 0.34 kg/ha. Fine fescue injury was 11 and 36%, respectively, from these two treatments at 8 WAT but increased to 21 and 50%, respectively, at 12 WAT and continued to persist at 16 WAT. The results of these studies suggest that aminocyclopyrachlor can be effectively used as a fertilizer granule treatment applied to dry foliage for broadleaf weed control in cool-season turfgrass. However, injury observed on Kentucky bluegrass and especially fine fescue warrant further investigation."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mansue, C., and S. Hart. 2010. Broadleaf weed control and cool-season turfgrass safety with aminocyclopyrachlor applied on a fertilizer granular. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 64:p. 73-74.
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http://www.newss.org/proceedings/proceedings_2010.pdf#page=89
    Last checked: 07/22/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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