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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Smith, M. C.;
McClelland, M. R.;
Jordan, D. L.;
Frans, R. E.;
King, C. A. |
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| Author Affiliation: | University of Arkansas; Fayetteville, Arkansas |
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| Title: | Annual grass control with various postemergence herbicides |
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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. 75. |
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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: Setaria viridis; Digitaria sanguinalis; Eleusine indica; Sorghum halepense; Echinochloa crusgalli; Postemergence herbicides
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| Abstract/Contents: | "Field experiments were conducted in 1991 and 1992 to evaluate efficacy of nicosulfuron, quizalofop-P, and clethodim on broadleaf signalgrass [Brachiaria platyphylla (Griseb.) Nash], green foxtail [Setaria viridis (L.) Beauv], large crabgrass [Digitaria sanguinalis (L.) Scop.], gossegrass [Eleusine indica (L.) Gaertn.], seedling johnsongrass [Sorghum halepense (L.) Pers.], and barnyardgrass [Echinochola crus-galli (L.) Beauv.]. Nicosulfuron (18 and 35 g ai ha-1), quizalofop (35 and 70 g ai ha-1), and clethodim (105 and 140 g ai ha-1) were applied at the 1- to 2-leaf, 3- to 5-leaf, and 6- to 8-leaf stages of growth. Treatments wree applied in 187 L/ha with a CO2-pressurized backpack sprayer. A nonionic surfactant at 0.25% v/v was included with nicosulfuron and quizalofop-P. Clethodim was applied with crop oil concentrate at 1.0% v/v. Seeds of weeds were planted in rows 25 cm apart and herbicide treatments were applied perpendicular to the weed rows. The experimental design was a split plot with 3 replications. Visual estimates of percent control were taken two weeks after treatment. At the rates applied in these experiments, nicosulfuron was the least effective of the herbicides applied, especially when application was delayed. Seedling johnsongrass was the most sensitive of the species. Control at all rates at all timings provided at least 87% control of seedling johnsongrass. Control of large crabgrass, broadleaf signalgrass, goosegrass, and barnyardgrass with clethodim and quizalofop-P was less when applied at the late timing than when applied at the early and mid timings. In 1992, control with clethodim and quizalofop-P was at least 92% with both rates at all timings. Delaying the timing of nicosulfuron decreased control of large crabgrass, broadleaf signalgrass, goosegrass, barnyardgrass, and green foxtail. Control of these species at the early timings was 87% with nicosulfuron at both rates and control at the mid timing ranged from 73 to 97%. Control at the late timing was acceptable except in the case of broadleaf signalgrass with the 18 g ai ha-1 rate of nicosulfuron and green foxtail at both rates in 1991." |
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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):
Smith, M. C., M. R. McClelland, D. L. Jordan, R. E. Frans, and C. A. King. 1993. Annual grass control with various postemergence herbicides. South. Weed Sci. Soc. Proc. 46:p. 75. |
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MSU catalog number: SB 611 .S6 v.46 |
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