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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Murphy, T. R.;
Burpee, L. |
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| Author Affiliation: | Murphy: Crop and Soil Sciences Department, University of Georgia, Griffin, GA; Burpee: Plant Pathology Department, University of Georgia, Griffin, GA |
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| Title: | Influence of brown patch (Rhizoctonia solani) control on preemergence herbicide efficacy in tall fescue |
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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. 56. |
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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: Brown patch; Rhizoctonia solani; Disease control; Preemergence herbicides; Festuca arundinacea; Azoxystrobin; Digitaria ischaemum; Pendimethalin; Prodiamine; Oxadiazon; Herbicide evaluation; Herbicide combinations; Crabgrass control; Visual evaluation
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| Cultivar Names: | Ky 31 |
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| Abstract/Contents: | "Brown patch (Rhizoctonia solani) is a major disease of tall fescue during the hot, humid summer months. Affected leaves develop dark brown lesions, wilt and eventually turn brown. Tall fescue growth and density is decreased in affected areas. Fungicides such as azoxystrobin are available for the control of brown patch in turfgrasses. Various preemergence herbicides are commonly used to control crabgrass (Digitaria spp.) in tall fescue. Previous research conducted in Georgia showed that pendimethalin provided better crabgrass control in common bermudagrass than in tall fescue. However, in tall fescue and common bermudagrass oxadiazon provided similar levels of crabgrass control. A field experiment was conducted in 1999 in Griffin, GA to determine if the use of azoxystrobin (Heritage) improved the efficacy of selected preemergence herbicides in controlling smooth crabgrass (Digitaria ischaemum) in established `Ky 31' tall fescue. Sequential (+) and single treatments of pendimethalin at 1.5 + 1.5 and 3.0, prodiamine at 0.65 + 0.5 and 1.15 and oxadiazon at 2.0 + 2.0 and 4.0 lbs. ai/acre were evaluated. Sequential treatments were applied February and April 14, 1999. Single treatments were applied on February 16, 1999. Azoxystrobin (Heritage 50 WDG) at 0.54 lbs. ai/acre was applied to one-half of the plots on May 26, June 30 and August 4, 1999. A randomized complete block design with 5 replications and a factorial treatment arrangement was utilized. Brown patch infestation, smooth crabgrass control and tall fescue quality were evaluated at various times during the summer months. Azoxystrobin effectively reduced the infestation level of brown patch until late August. Additionally, azoxystrobin increased tall fescue quality at the late August evaluation for each herbicide and rate with the exception of prodiamine at 0.65 + 0.5 lbs. ai/acre. Azoxystrobin increased smooth crabgrass control at the late August evaluation by 17 and 23% for pendimethalin 1.5 + 1.5 and 3.0 lbs. ai/acre, respectively compared to pendimethalin at the same rates with no azoxystrobin. Prodiamine and oxadiazon at all rates, with or without azoxystrobin, provided equivalent levels of smooth crabgrass control. These data indicate that controlling brown patch in tall fescue will improve the control of smooth crabgrass in tall fescue with pendimethalin. However, no increase in smooth crabgrass control occurred when brown patch was controlled in tall fescue treated with either single or sequential applications of prodiamine and oxadiazon." |
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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):
Murphy, T. R., and L. Burpee. 2000. Influence of brown patch (Rhizoctonia solani) control on preemergence herbicide efficacy in tall fescue. South. Weed Sci. Soc. Proc. 53:p. 56. |
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