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| Publication Type:
| Refereed |
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| Author(s): | Schleicher, Leo C.;
Shea, Patrick J.;
Stougaard, Robert N.;
Tupy, Duane R. |
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| Author Affiliation: | Former Grad. Stud. and Prof., Dep. Agron., Univ. Nebraska, Lincoln, NE; Assist. Prof., Northwestern Agric. Res. Ctr., Montana St. Univ., Kalispell, MT; Res. Technol., Dep. Agron., Univ. Nebraska, respectively. Purdue Univ., Lafayette, IN |
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| Title: | Efficacy and dissipation of dithiopyr and pendimethalin in perennial ryegrass (Lolium perenne) turf |
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| Source: | Weed Science. Vol. 43, No. 1, January-March 1995, p. 140-148. |
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| Publishing Information: | Champaign, IL: Weed Science Society of America |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Herbicides; Dithiopyr; Pendimethalin; Lolium perenne; Test reports; Digitaria sanguinalis; Thinning; Thatch
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| Cultivar Names: | Blazer; Fiesta; Jazz |
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| Abstract/Contents: | "Efficay, movement, and degradation of dithiopyr and pendimethalin were monitored after application to perennial ryegrass turf in 1990 and 1991. Dithiopyr at 0.6 kg ai ha-1 reduced large crabgrass infestation by greater than or equal to 90% up to 87 DAT in both years, while pendimethalin at 1.7 kg ai ha-1 provided similar control up to 59 DAT in 1 of 2 yr. Turf thinning due to disease and insect damage in 1990 allowed more hericide to reach the thatch, mat, and underlying soil in 1991. In both years, more pendimethalin but less dithiopyr was found in thatch 7 DAT than 1 DAT, suggesting greater pendimethalin retention in verdure and thatch. Precipitation was greater after herbicide application in the second year, and concentration in the mat layer reached a maximum by 7 DAT compared to 14 DAT in 1990. Maximum concentrations of dithiopyr and pendimethalin in soil at 0 to 5 cm deep were 20 and 56 (Mu)g kg-1, respectively, measured 7 DAT in 1991. Herbicide concentration 5 to 10 cm deep was less than or equal to 5 (Mu)g kg-1 at all sampling dates in 1990. In 1991, dithiopyr and pendimethalin concentrations 5 to 10 cm deep did not exceed 4 and 20 (Mu)g kg-1, respectively, measured within 1 DAT. Neither herbicide was detected 10 to 20 cm deep, nor in samples collected 30 cm outside of the experimental plots in either year. At 126 DAT (final sampling date), little herbicide was detected in verdure, but residues were found in most thatch and all mat samples. The estimated time for a 50% reduction in detectable residues (DT50) of dithiopyr and pendimethalin from the sampling zone was 35 to 23 days, respectively." |
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| Language: | English |
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| References: | 30 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Schleicher, L. C., P. J. Shea, R. N. Stougaard, and D. R. Tupy. 1995. Efficacy and dissipation of dithiopyr and pendimethalin in perennial ryegrass (Lolium perenne) turf. Weed Sci. 43(1):p. 140-148. |
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MSU catalog number: SB 610 .W38 |
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