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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Jordan, J. H.;
Kurtz, M. E.;
Snipes, C. E. |
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| Author Affiliation: | Delta Branch, Mississippi Agricultrual and Forestry Exper. Station. Stoneville, MS; and Mississippi Agricultural & Forestry Exper. Station, Starksville, MS. |
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| Title: | Postemergence Bermudagrass Control in Cotton |
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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. 8. |
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| Publishing Information: | Southern Weed Science Society |
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| Keywords: | TIC Keywords: Cynodon dactylon; Postemergence herbicides; Fluometuron; Tank mix; Weed control
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| Abstract/Contents: | "Field experiments were conducted in 1983 and 1984 at the Delta Branch Experiment Station, Stoneville, Mississippi, to evaluate tank mix combinations of fluometuron and postemergence grass herbicides for bermudagrass [Cynodon dactylon (L.) Pers.] control in cotton (Gossypium hirsutum L.). Herbicides evaluated were sethoxydim, haloxyfop-methyl, fluazifop-butyl, DPX-Y6202 (ethyl [2- [4- (6-chloro-2-quinoxalinyl) oxy] phenoxy] propionate), and SC 1084 (Stauffer Chemical Co.). Rates used in 1983 were single applications of 0.56, 0.14, 0.42, 0.14, and 0.56 kg/ha for sethoxydim, haloxyfop-emthyl, fluazifop-butyl, DPX-Y6202, and SC 1084, respectively. The fluazifop-butyl rate was reduced to 0.28 kg/ha when tank mixed with fluometuron. In 1984, slpit applications were made at rates of 0.34/0.22, 0.14/0.14, 0.28/0.28, 0.14/0.14 and 0.28/0.28 kg/ha for each respective herbicide. These herbicides were applied alone and in combination with fluometuron at 1.68 kg/ha. In 1983, a non-ionic surfactant at 0.25% was used with all herbicides and herbicide combinations except sethoxydim and SC 1084 when 1.25% crop oil was used. Surfactant was replaced by crop oil at 1.25% in 1984. Bermudagrass seed were grown in 7.6 cm peat pots filled with a silty clay loam soil in a greenhouse and were transplanted into the field on April 27 and May 7 in 1983 and 1984, respectively. DES 422 cotton was planted in mid-May. At the time of herbicide application, cotton was in the cotyledon stage, approx. 4.5 cm in height, and severely stressed due to cool seather and excess moisture in 1983. In 1984, cotton was healthy and 10 cm tall. All herbicides were applied to bermudagrass with 10-20 cm runners in a spray volume of 187 1/ha with a CO2 pressurized backpack sprayer. At 6 weeks after application, greater than 90% bermudagrass control was achieved with SC 1084, DPX-Y6202 haloxyfop, and fluazifop alone or tank mixed with fluometuron in 1983. In 1984, bermudagrass control was less than that obtained in 1983. A single herbicide application did not give satisfactory control of bermudagrass at 6 weeks after application. These results were probably due to increased moisture stress and decreased humidity at application during 1984. A second herbicide application resulted in greater than 90% control of bermudagrass 3 weeks after application with all herbicides. In 1983, the addition of fluometuron reduced the activity of sethoxydim, but had no significant effect on the other herbicides. The use of fluometuron alone resulted in 20% crop injury, but when tank mixed with sethoxydim and SC 1084, injury was more severe. In 1984, the addition of fluometuron did not reduce activity of any herbicide evaluated and crop injury was insignificant." |
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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):
Jordan, J. H., M. E. Kurtz, and C. E. Snipes. 1985. Postemergence Bermudagrass Control in Cotton. Proc. Meet. South. Weed Sci. Soc. 38:p. 8. |
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MSU catalog number: SB 611 .S6 v.38 |
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