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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Boyd, J. W.;
Rodgers, B. N. |
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| Author Affiliation: | University of Arkansas, Little Rock, AR |
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| Title: | Winter weed control with reduced rates of isoxaben |
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| Section: | Section II: Weed management in turf, pasture and rangeland
Other records with the "Section II: Weed management in turf, pasture and rangeland" Section
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| Meeting Info.: | 53rd Annual Meeting, Tulsa, OK, January 24-26, 2000 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 53, 2000, p. 55. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Weed control; Preemergence weed control; Isoxaben; Sherardia arvensis; Stellaria media; Lamium amplexicaule; Application rates; Broadleaf weed control; Pendimethalin; Prodiamine; Dithiopyr; Oryzalin; Simazine; Winter annual weeds; Poa annua control; Application timing; Tank mix; Herbicide combinations
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| Abstract/Contents: | "Preemergence herbicides for annual bluegrass control must be applied during early September to provide effective control. Because many grass herbicides provide inconsistent control of broadleaf winter annuals, an additional herbicide application is required for broad-spectrum control. Simazine is commonly used for winter annual control but must be applied later than annual bluegrass herbicides. Isoxaben has sufficient residual properties to allow application in early Septemberalong [September along] with an annual bluegrass herbicide. Our objective in evaluating reduced rates of isoxaben for broadleaf control was to look for a means of making this herbicide a viable option by reducing its cost per acre. Three experiments were conducted at Lonoke and North Little Rock in central Arkansas from 1997 to 1999 to evaluate isoxaben at reduced rates in combination with full rates of annual bluegrass herbicides. Treatments were applied in early September and evaluated early the following spring. The weed species present were field madder (Sherardia arvensis), common chickweed (Stellaria media) and henbit (Lamium amplexicaule). Isoxaben rates at the North Little Rock location included 0.25, 0.5, and 0.75 lb/ai/a. Isoxaben was tank mixed at these rates with pendimethalin, prodiamine, dithiopyr and oryzalin at 3.0, 0.75, 0.5, and 2.0 lb/ai/a, respectively. Simazine at 1.0 lb/ai/a alone and tank mixed with each grass herbicide was included as a standard. Isoxaben did not control field madder during either year. Oryzalin was the only treatment that provided effective control of field madder. Oryzalin averaged 94% control of field madder across five treatments in the spring of 1998. Tank mixing oryzalin with isoxaben or simazine did not improve control. In 1998, control with isoxaben averaged 42%. This may be due in part to heavy rainfall immediately before and after the application. The Lonoke site received the same treatments as North Little Rock with the addition of isoxaben and simazine alone at 1.0 lb/ai/a 2.0 lb/ai/a and tank mixed with pendimethalin, prodiamine, dithiopyr and oryzalin at the rates listed above. All 20 treatments that included isoxaben provided 100% control of henbit. Eighteen of the 20 provided 100% control of common chickweed. The remaining two isoxaben treatments, isoxaben + pendimethalin (0.25 + 3.0 lb/ai/a) and isoxaben + dithiopry [dithiopyr] (0.5 + 0.5 lb/ai/a) provided 90% control of common chickweed. Simazine alone provided no control of henbit and chickweed. Alone, or tank mixed with simazine, pendimethalin, prodiamine, dithiopyr and oryzalin gave 50 to 60% control of henbit and chickweed. The Lonoke study, applied on September 17, 1997, was rated for crabgrass control on May 27, 1998. The prodiamine, oryzalin, pendimethalin and dithiopyr treatments averaged 80, 51, 27, and 0% control, respectively." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Boyd, J. W., and B. N. Rodgers. 2000. Winter weed control with reduced rates of isoxaben. South. Weed Sci. Soc. Proc. 53:p. 55. |
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MSU catalog number: SB 611 .S6 v.52 |
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