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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | King, J. W.;
Crawley, R. D. |
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| Author Affiliation: | Dept. of Agronomy, University of Arkansas, Fayetteville, AR. |
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| Title: | Efficiacy and Phytotoxicity of Fenoxaprop-Ethyl in the Mid-South. |
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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. 123. |
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| Publishing Information: | Nashville, TN: Southern Weed Science Society. |
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| Keywords: | TIC Keywords: Phytotoxicity; Fenoxaprop-ethyl; Festuca arundinacea; Digitaria sanguinalis; Application rates; Pendimethalin; 2,4-D + Mecoprop + Dicamba; Eleusine indica; Cynodon dactylon; Zoysia; MSMA; Injuries; Overseeding
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| Abstract/Contents: | "Rebel tall fescue turf, overseeded with crabgrass at 30 g/m2 or goosegrass at 15 g/m2 and located in sunny and shaded areas was used for five field tests. Fenoxaprop (Acclaim 1 EC) rates of 134, 202, and 280 g ai/ha (0.12, 0.18, and 0.25 lb/A) were compared to pendimethalin (Pre-M) at 3362 g/ha (3 lb/A) or MSMA at 2802 g/ha (2.5 lb/A) alone or in combination with pendimethalin or 2,4-D + mecoprop + dicamba (Trimec) at 1121 g/ha (1 lb/A 2,4-D). Herbicides were sprayed at 300 L/ha with 8003 nozzles on 1.5 x 1.5 m plots. The timing of spraying in relation to developmental stage of crabgrass and goosegrass seedlings or seasonal maturity of common bermuda or common zoysia was a major determinate of efficiacy or injury. In 1986, 1-3 leaf stage crabgrass sprayed once on 20 May was controlled excellently initially (3 June) by all rates of fenoxaprop and pendimethalin (But not MSMA) alone, however, fenoxaprop plots had 30 to 50% crabgrass cover by 9 July while pendimethalin preventyed further crabgrass well. Waiting until 30 June to spray 5 leaf to 3 tiller crabgrass resulted in no crabgrass control. Sun and shade results were similar. Spraying 5 leaf to 1 tiller crabgrass on 26 June, 1987, resulted in only about 75% initial control by fenoxaprop or fenoxaprop + pendimethalin and pendimethalin alone or with MSMA gave little control. Results were a little better in the shade because of smaller seedlings. Applying fenoxaprop to 2-3 leaf goosegrass on 30 June, 1986, and again on 19 July gave excellent goosegrass and crabgrass (not overseeded so slight infestation) control through mid August. Adding Trimec to fenoxaprop (280 g/ha) stopped crabgrass but not goosegrass, control ( and controlled spurge). Fenoxaprop applied to 2 to 3 tiller goosegrass on 19 July failed to give control. Only slight injury to tall fescue was observed. Injury to common bermudagrass of 5-6 on a 1-9 dead visual scale occurred after 20 May, 1986, fenoxaprop application, but 30 June and 21 July applications resulted in only slight injury (or crabgrass control). Fenoxaprop applied 26 July, 1987, produced 3-4 level of bermuda injury, but only slight injury to common zoysiagrass. Ranking of injury was common bermuda (~6) > Tifway bermuda (~5) >> Meyer zoysia (~2.5) > common zoysia (~1.2) when 125, 250, and 500 g/ha of fenoxaprop were applied to sod plugs grown in the greenhouse in late fall 1987; topgrowth and root production were reduced similarly. Careful applications might suppress bermuda in zoysia or cool-season turfs." |
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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):
King, J. W., and R. D. Crawley. 1988. Efficiacy and Phytotoxicity of Fenoxaprop-Ethyl in the Mid-South.. South. Weed Sci. Soc. Proc. 41:p. 123. |
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MSU catalog number: SB 611 .S6 |
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