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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Croon, K. A.;
Merkle, M. G.;
Norton, K. R. |
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| Author Affiliation: | Texas Agric. Exper. Station, College Station, TX. |
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| Title: | Activity of Fluazifop-butyl/Adjuvant Combination against Johnsongrass |
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| Meeting Info.: | Held: January 14-16, 1985, Houston, TX. |
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| Source: | Proceedings of the 38th Southern Weed Science Society. Vol. 38, 1985, p. 45. |
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| Publishing Information: | Southern Weed Science Society |
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| Keywords: | TIC Keywords: Fluazifop-butyl; Adjuvants; Sorghum halepense; Postemergence herbicides; Weed control; Herbicide rates
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| Abstract/Contents: | "The ability of adjuvants to increase the activity of many herbicides has been established for over three decades. However, their widespread use as a standard constituent to herbicide sprays has occurred primarily since the early 1960's (Adjuvants for Herbicides, WSSA, 1982). Our agricultural marketing system provides the consumer with a wide selection of surfactants and oils, with many claiming to increase the activity of the herbicide. A field experiment was conducted at the agriculture experiment station at College Station, TX to test a number of adjuvants. Fluazifop-butyl was applied postemergence at a rate of 0.28 kg/ha to a solid stand of rhizomonous johnsongrass (Sorghum halapense). Fluazifop-butyl was applied alone and in combination with the following adjuvants: Triton AG-98 (non-ionic surfactant), Agri-Dex (paraffin based patroleum oil), Natur'l Oil (vegetable oil), Herbimas (paraffin based petroleum oil), and a diesel oil/surfactant (80/20) blend. The surfactant was added at 0.25% of spray volume and each oil was added at a rate of 1 qt/A. A plot receiving only the diesel oil/surfactant adjuvant was included to observe the phytotoxicity caused by the adjuvant alone. Control of the rhizome johnsongrass was raed at 14, 28, and 56 days after treatment. At both 14 and 28 days the addition of adjuvants to fluazifop-butyl did not increase the percent control of rhizome johnsongrass with average control ratings of 80% and 88% at 14 and 28 days respectively after treatment. However, at 56 days after treatment a significantly greater amount of regrowth occurred in the plots treated with fluazifop-butyl alone and resulted in a control rating of only 65% as compared to an average of 82% control where the adjuvants had been used. This may reflect the adjuvant's ability to ensure uniform target coverage or increase the foliar penetration of the herbicide. This additional control obtained with the use of adjuvants was not affected by adjuvant type. A slight phytotoxicity was observed 14 days after treatment with the application of the diesel oil/surfactant alone." |
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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):
Croon, K. A., M. G. Merkle, and K. R. Norton. 1985. Activity of Fluazifop-butyl/Adjuvant Combination against Johnsongrass. Proc. Meet. South. Weed Sci. Soc. 38:p. 45. |
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MSU catalog number: SB 611 .S6 v.38 |
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