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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1986_vol40.pdf#page=283
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Bhowmik, Prasanta C.;
Spokas, Lesley A. |
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| Author Affiliation: | University of Massachusetts |
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| Title: | Tridiphane for postemergent crabgrass control in turfgrass |
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| Source: | Proceedings of the Annual Meeting of the Northeastern Weed Science Society. Vol. 40, 1986, p. 282. |
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| Publishing Information: | Ithaca, N. Y. : Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Digitaria sanguinalis; Tridiphane; Crabgrass control; Poa pratensis; Application rates; Fenoxaprop-ethyl; Phytotoxicity; Application timing; Developmental stages
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| Abstract/Contents: | "Two field experiments were conducted at the University of Massachusetts Turfgrass Research Station to determine the efficacy of tridiphane for postemergent crabgrass (Digitaria sanguinalis (L.) Scop) control. The objectives of these experiments were i) to evaluate the effects of carrier volume on tridiphane efficacy, ii) to determine optimum herbicide rate and iii) to evaluate the time of application of tridiphane in relation to the growth stage of crabgrass. Experiments were conducted on an established Kentucky bluegrass turf maintained at a height of 3.8cm. Treatments were applied to 1 by 2 m plots with a CO2 sprayer at a spressure of 152 kPa. Experiment one consisted of application of tridiphane on 11 June and 26 July at rates of 0, 1.12, 1.68, 2.24 kg/ha in carrier volumes of 562, 1124, and 1686 L/ha. Percent control (0 to 100) of crabgrass was determined on 9 July. Acceptable control was considered to be 90% or better. Tridiphane applied at 1.68 and 2.24 kg/ha demonstrated excellent control (93 to 95%) while significantly less control was exhibited at 1.12 kg/ha. Acceptable control was achieved at the higher two volumes for all rates. June 11 applications using a carrier volume of 562 L/ha provided 83 to 95% control while June 26 applications at the same volume provided only 75 to 88% control. In experiment two, varying rates of tridiphane (0, 1.12, 1.68, 2.24 kg/ha) and fenoxaprop-ethyl (0.28 and 0.42 kg/ha) applied in 1068 L/ha at either the 2-3 leaf or the 3-5 leaf stage of crabgrass development were evaluated. Treatments were applied on 11 and 28 June. Split applications were made on 11 July and 9 August 1985. Phytotoxicity (0 to 100%) was determined on 9 July. Crabgrass control was rated to tridiphane applied at either developmental stage. Tridiphane applied at 2.24 kg/ha at the 2-3 leaf stage provided 72% control on 9 July improving to 99% control on 28 August. Treatments receiving split applications of tridiphane at 1.12 + 1.12 kg/ha, 30 or 45 days later, demonstrated excellent control irrespectie of the growth stage at time of initial application. The single application of tridiphane applied at 1.12 kg/ha at the 3-5 leaf stage exhibited the least control (80%) on 28 August. Fenoxaprop-ethyl caused unacceptable phytotoxicity (40 to 53%) at both rates when applied at the 2-3 leaf stage and lower phytotoxocity (22%) when applied at the 3-5 leaf stage. Excellent initial crabgrass control was obtained with fenoxaprop-ethyl on 9 July for both rates but neither provided season long control." |
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| Language: | English |
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| References: | Unknown |
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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):
Bhowmik, P. C., and L. A. Spokas. 1986. Tridiphane for postemergent crabgrass control in turfgrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 40:p. 282. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1986_vol40.pdf#page=283
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 |
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