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| Publication Type:
| Report |
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| Author(s): | Bingham, S. W. |
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| Author Affiliation: | Virginia Polytech. Inst., State Univ., Blacksburg |
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| Title: | Influence of residual benfluralin and N-sec-butyl-4-tert-butyl-2,6-dinitroaniline in the soil on turfgrass seedling establishment |
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| Source: | Abstracts of the Annual Meeting of the Weed Science Society. 1974, p. 20. |
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| Publishing Information: | Weed Science Society of America |
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| Keywords: | TIC Keywords: Benfluralin; Poa pratensis; Festuca rubra subsp. rubra; Digitaria; Lolium perenne
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| Abstract/Contents: | The purpose of this study was to determine the length of the waiting period between treatment for control of annual grasses and the time turfgrasses may be resown. Soil preparation included ploughing, discing several times, raking and treatment of the entire area with methyl bromide. Light soil preparation was carried out over the plots at the time of sowing turfgrasses. Benfluralin residues were below the limits of detection using turfgrass seedlings at 5 1/2 months after application of rates up to 9 kg/ha. Seedlings were injured and emergence delayed especially with 4.5 kg/ha or more applied at 2 months prior to sowing turfgrasses. The normally used rates of 2.25 to 4.5 kg/ha showed some inhibition of seedling development for 2 months. Seedbed preparation, involving mixing the herbicide into the soil to a depth of approximately 1.25 cm diluted the benfluralin somewhat. However, the 2.25 kg/ha rate caused severe damage, and controlled most of the turfgrass seedlings when applied at the time of final seedbed preparation. Bluegrass [Poa pratensis] and red fescue [Festuca rubra] were the most sensitive, and perennial ryegrass [Lolium perenne] was the most tolerant turfgrass species. Butralin residues affected bluegrass more severely than the other grasses. Enough butralin residue from a 6.75 kg/ha rate remained for 2 months to reduce bluegrass seedling establishment by 60%. Less than 25% inhibition of seedling establishment was obtained when sowing was after 3 months. Injury ratings revealed that shoot growth was reduced during seedling establishment with 4.5 kg/ha (low to normal rate for crabgrass [Digitaria sp.] control) applied 3 months before sowing any of the three turfgrasses. |
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| Language: | English |
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| References: | Unknown |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bingham, S. W. 1974. Influence of residual benfluralin and N-sec-butyl-4-tert-butyl-2,6-dinitroaniline in the soil on turfgrass seedling establishment. Abstr. Annu. Meet Weed Sci. Soc. Am. p. 20. |
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MSU catalog number: SB 611 .W42 |
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