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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Castner, E. P.;
Murray, D. S. |
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| Author Affiliation: | Department of Agronomy, Oklahoma State University, Stillwater, OK. |
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| Title: | Large Crabgrass Control and Grain Sorghum Response to Herbicides Applied With A Shielded Sprayer. |
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| Meeting Info.: | Held: January 18-20, 1988, Tulsa, OK. |
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| Source: | Southern Weed Science Society Proceedings. Vol. 41, January 1988, p. 98. |
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| Publishing Information: | Nashville, TN: Southern Weed Science Society. |
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| Keywords: | TIC Keywords: Digitaria sanguinalis; Control; Responses; Herbicides; Application methods
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| Abstract/Contents: | "Field experiments were initiated at two locations to measure the response of grain sorghum (Sorghum bicolor L.) and large crabgrass [Digitaria snaguinalis (L.) Scop.] to herbicides applied with a shielded sprayer. At Chickasha, the objective was to evaluate the effect of a shielded sprayer application of sethoxydim, fluazifop, paraquat, glyphosate, prepackaged glyphosate plus alachlor, and tank mixes of sethoxydim plus alachlor, fluazifop plus alachlor, paraquat plus alachlor, and glyphosate plus alachlor on weed-free grain sorghum. At Perkins, the objectives were to evaluate the response of grain sorghum and large crabgrass to shielded sprayer applications of these herbicides. Early postemergence treatments were applied to six- and eight-leaf grain sorghum and late postemergence treatments were applied to twelve- and ten-leaf grain sorghum at Chickasha and Perkins, respectively. At each location, four row by 9 meter plots were arranged in a randomized complete block design with four replications. Treatments were applied with a tractor mounted three row shielded sprayer. Each spray unit consisted of one 9503-E flat fan nozzle with a treatment width of 82 cm. A compressed carbon dioxide system was used to deliver a spray volume of 140 l/ha. At Chickasha, visual crop injury ratings were made on July 8 and July 30. At Perkins, visual large crabgrass control ratings were made on July 23, August 3, and August 24 and a crop injury rating was made on July 23. At both locations, two rows of each plot were harvested with a small plot combine and grain sorghum weight and moisture were recorded. At Chickasha, the early postemergence treatments of fluazifop, sethoxydim, and fluazifop plus alachlor caused significant grain sorghum injury of 49, 13, and 26%, respectively. By the second rating, this crop injury was reduced to 12, 3, and 4%, respectively. All other crop injury ratings were less than 5%. The late postemergence treatment with fluazifop, sethoxydim, and fluazifop plus alachlor caused grain sorghum injury of less than 10%. Fluazifop reduced grrain sorghum yields for both treatment dates while also increasing grain moisture when applied to 12-leaf grain sorghum. Sethoxydim caused yield reductions when applied to twelve leaf grain sorghum. At Perkins, the early postemergence application of sethoxydim, glyphosate, prepackaged glyphosate plus alachlor provided excellent large crabgrass control (92%) while glyphosate, paraquat, and glyphosate plus alachlor were the only late postemergence treatments which provided acceptable control. The early postemergence application of fluazifop reduced grain yield by 14%. There were no differences in grain moisture at the Perkins location." |
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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):
Castner, E. P., and D. S. Murray. 1988. Large Crabgrass Control and Grain Sorghum Response to Herbicides Applied With A Shielded Sprayer.. South. Weed Sci. Soc. Proc. 41:p. 98. |
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MSU catalog number: SB 611 .S6 |
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