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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Cobill, R. M.;
Reynolds, D. B.;
Smith, H. C.;
Bloodworth, W. F. |
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| Author Affiliation: | Mississippi State University, Mississippi State, MS |
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| Title: | Effect of harvest-aid tank mixtures on johnsongrass (Sorghum halepense L.) control with Roundup D-Pak |
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| Section: | Section I: Weed management in agronomic crops
Other records with the "Section I: Weed management in agronomic crops" Section
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| Meeting Info.: | 53rd Annual Meeting, Tulsa, OK, January 24-26, 2000 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 53, 2000, p. 47. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Sorghum halepense; Weed control; Glyphosate; Tank mix; Application rates; Thidiazuron; Tribufos; Dimethipin; Ethephon; Visual evaluation
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| Abstract/Contents: | "Field studies were conducted in 1995 at the St. Joseph Research Station near St. Joseph, LA, and in 1998 and 1999 at the Plant Science Research Center near Starkville, MS to evaluate the effects of tank mixing harvest aids with Roundup D-Pak (glyphosate) on johnsongrass control. Treatments were arranged in a three-factor factorial arrangement of treatments in a randomized complete block design with 4 replications. Experimental units were 6.67 by 40 feet. Factor A was 15 and 20 oz/A Roundup D-Pak. Factor B was defoilants: 0.05 and 0.1 lb ai/A Dropp 50WP (thidiazuron), 0.56 and 1.125 lb ai/A Folex 6EC (tribufos), 0.25 and 0.3 lb ai/A Harvade 5F (dimethipin), and no defoilant. Factor C was either 1.0 lb ai/A Prep (ethephon) or no Prep. Visual control ratings were taken at 14 and 28 days-after-treatment (DAT). Roundup D-Pak rate had no significant effect on johnsongrass control, regardless of evaluation interval. In 1995, Johnsongrass control with 0.05 and 0.1 lb ai/A Dropp with no Prep decreased control below that of Roundup alone 14 DAT, and also in 1995, johnsongrass control with Roundup + 0.1 lb ai/A Dropp increased with the addition of 1.0 lb ai/A Prep 14 DAT. Johnsongrass control with Roundup + 0.05 lb ai/A Dropp with no Prep less was than control with Roundup + 1.125 lb ai/A Folex and both rates of Harvade 14DAT in 1995. Johnsongrass control 14 DAT with Roundup + 0.1 lb ai/A Dropp with no Prep was less than all treatments without Prep added in 1995. Also in 1995, johnsongrass control 14 DAT with Roundup + 0.56 lb ai/A Folex + 1.0 lb ai/A Prep and Roundup + 0.3 lb ai/A Harvade + 1.0 lb ai/A Prep was greater than with Roundup + 0.05 lb ai/A Dropp + 1.0 lb ai/A Prep. In 1998, there were no differences in control among defoilants applied with or without 1.0 lb ai/A Prep tank-mixed with Roundup. The addition of 1.0 lb ai/A Prep to 0.1 lb ai/A Dropp or 0.56 lb ai/A Folex tank-mixed with Roundup increased johnsongrass control 14 DAT when compared to mixtures with 0.1 lb ai/A Dropp or 0.56 lb ai/A Folex without Prep. Johnsongrass control 14 DAT with Roundup was lower with the addition of 1.0 lb ai/A Prep to 0.3 lb ai/A Harvade in 1999. Johnsongrass control 28 DAT was not affected by Prep. Harvest aids had no effect on johnsongrass control with Roundup 28 DAT in 1995. Johnsongrass control 28 DAT in 1999 with Roundup + 0.3 lb ai/A Harvade was less than achieved by Roundup when mixed with either rate of Folex or Dropp. In 1999, johnsongrass control with Roundup + 0.25 lb ai/A Harvade was less than with Roundup + 1.125 lb ai/A Folex 28 DAT." |
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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):
Cobill, R. M., D. B. Reynolds, H. C. Smith, and W. F. Bloodworth. 2000. Effect of harvest-aid tank mixtures on johnsongrass (Sorghum halepense L.) control with Roundup D-Pak. South. Weed Sci. Soc. Proc. 53:p. 47. |
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