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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.;
Johnson, B. J. |
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| Author Affiliation: | Agronomy Department, The University of Georgia, Georgia Experiment Station, Griffin |
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| Title: | Efficacy of metolachlor in bermudagrass |
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| Meeting Info.: | Charlotte, NC: January 18-20, 1993 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 46, 1993, p. 100. |
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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: Cynodon dactylon; Digitaria sanguinalis; Eleusine indica; Poa annua control; Spring transition; Metolachlor
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| Abstract/Contents: | "Crabgrass (Digitaria spp.) and goosegrass [Eleusine indica (L.) Gaertn.] are problem summer annual grass weeds in southern turfgrasses. Experiments were conducted to evaluate the efficacy of metolachlor for controlling these two weed species and for its effects on bermudagrass quality. Annual grass control experiments were conducted on common bermudagrass golf course fairways in 1991 and 1992 at Athens and Griffin, Georgia. A separate experiment was conducted in 1992 at the Georgia Experiment Station in Griffin to evaluate the effects of metolachlor on the spring transition of 'Tifway' bermudagrass. Plot size was 5.0 by 10.0 feet in all experiments. Treatments were arranged in a Randomized Complete Block Design with either three or four replications. Metolachlor 7.8EC was used in all experiments. Metolachlor at 4.0 lb. ai/acre, applied in late February, provided < or = 30% crabgrass control at the late August evaluation. Metolachlor at 4.0 lbs. ai/acre, applied in late February and again in late April or May, controlled > or = 98% crabgrass in two of three experiments; however, control was only 65% in an additional experiment. A single late February application of metolachlor at 4.0 lbs. ai/acre did not effectively control goosegrass at the late August evaluation. Metolachlor at 4.0 lbs. ai/acre, applied in late February and again in late April of May, provided 78% goosegrass control in one experiment, but only 40% in an additional experiment. A single application of metolachlor at 4.0 lbs. ai/acre, or repeat applications at 4.0 + 4.0 lbs. ai/acre delayed the spring transition (green-up) of common bermudagrass in April in one of three experiments. However, the effect was temporary and common bermudagrass completely recovered by mid-June. A single application of metolachlor at 4.0 lbs. ai/acre delayed the spring transition of 'Tifway' bermudagrass if the initial application was made in late February when bermudagrass was at the 5% green-up growth stage. Metolachlor affected spring transition for up to two months after application. However, if the application of metolachlor was delayed until mid-April when 'Tifway' bermudagrass was at the 60% green-up growth stage, subsequent transition was not affected. Delays in spring transition were not observed with pendimethalin at either 3.0 or 6.0 lbs. ai/acre." |
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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 B. J. Johnson. 1993. Efficacy of metolachlor in bermudagrass. South. Weed Sci. Soc. Proc. 46:p. 100. |
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