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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Holloway, J. C. Jr.;
Cole, A. W.;
Lilwah, R. |
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| Author Affiliation: | Department of Plant Pathology and Weed Science, Mississippi State University, Mississippi State, MS |
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| Title: | Soil pH influence on metsulfuron methyl activity |
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| Meeting Info.: | Little Rock, AR; January 21-22, 1992 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 45, January 1992, p. 139. |
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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: Soil pH; Soils; Metsulfuron
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| Abstract/Contents: | "Field experiments were conducted on two soil types in 1990 and 1991 to determine the effects of soil pH on residual metsulfuron methyl activity. Italian ryegrass (Lolium multiflorum Lam.) was used as the indicator species to determine activity. A Prentiss fine sandy loam was adjusted from pH 5.2 to an average of 6.1, 6.4, 6.5, and 6.7 by adding the equivalent of 1680, 3360, 5040, and 6720 kg dolomitic lime per ha, respectively. An Okolona silty clay was also adjusted from pH 6.3 to an average of 6.6, 6.9, and 7.0 by adding the equivalent of 2240, 4480, and 6720 kg dolomitic lime per ha, respectively. Lime was applied in October of 1989 and 1990 and metsulfuron methyl was applied at 22 g ai ha-1 in May of 1990 and 1991. Soil plugs, 10 cm in diameter and 5 cm deep, were removed at both sites on the day of herbicide application and at 21 d intervals for a total of five sampling dates. Plugs were placed in the greenhouse, where 10 Italian ryegrass seeds were planted on the surface of each plug and covered with 6 mm of sand. Germination data were taken at 3 d intervals and the ryegrass was allowed to grow for 24 d before height and dry weight were measured. The experimental design was a randomized complete block with a split plot arrangement of treatments and four replications. pH was whole plots and herbicide treatments were subplots. Metsulfuron methyl activity as indicated by ryegrass bioassy did not vary with the pH levels established in these studies; however, there were differences between soil types. Activity was no longer detectable after 3 wk in the Prentiss fine sandy loam; however, there was detectable activity in the Okolona silty clay up to 12 wk after application." |
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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):
Holloway, J. C. Jr., A. W. Cole, and R. Lilwah. 1992. Soil pH influence on metsulfuron methyl activity. South. Weed Sci. Soc. Proc. 45:p. 139. |
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MSU catalog number: SB 611 .S6 |
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