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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Kelly, S. T.;
Coats, G. E. |
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| Author Affiliation: | Department of Plant Pathology and Weed Science, Mississippi State University, Mississippi State, MS |
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| Title: | Winter weed control in southern turfgrasses |
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| Meeting Info.: | Little Rock, AR; January 21-22, 1992 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 45, January 1992, p. 132. |
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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: Weed control; Turfgrasses; Herbicides; Poa annua
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| Abstract/Contents: | "Experiments were conducted in 1990 and 1991 to evaluate herbicides for winter weed control. Experiment 1 was conducted at Jackson and Louisville, MS to evaluate herbicides for annual bluegrass ( Poa annua L.) control. In late January, there were no differences between October or November applications of 560 to 2240 g ai ha-1 simazine, 2240 g ai ha-1 atrazine, 1120 g ai ha-1 isoxaben, 3360 g ai ha-1 oryzalin, 1120 + 3360 g ha-1 isoxaben + oryzalin, 560 + 3360 g ai ha-1 simazine + pendimethalin (Pre-M r), 280 or 560 g ai ha-1 imazaquin, 3360 g ha-1 pendimethalin (Stomp r) or 280 + 1590 or 560 + 3360 g ha-1 imazaquin + pendimethalin (pre-package mix, Reflect r). Treatments, except less than or equal to 1120 g ha-1 simazine or 280 g ha-1 imazaquin, controlled annual bluegrass greater than or equal to 80%. By late February, only isoxaben + oryzalin provided greater than or equal to 80% annual bluegrass control at both locations. Experiment 2 was initiated to evaluate three pyridine herbicides for POST winter broadleaf weed control. Pyridine herbicides included 28 to 450 g ae ha-1 clopyralid or fluroxypyr or 28 to 227 g ae ha-1 triclopyr ester or amine. A pre-package mixture of 850 + 450 + 90 g ae ha-1 2, 4-D + mecoprop + dicamba was used for comparison. No treatment maintained greater than or equal to 70% control of henbit (Lamium amplexicaule L.), common chickweed [Stellaria media (L.) Cyrillo.], or Carolina geranium (Geranium carolinianum L.). Clopyralid at greater than or equal to 56 g ha-1 maintained control of dandelion (Taraxacum officinale Weber in Wiggers) comparable to 2, 4-D + mecoprop + dicamba. Experiment 3 was conducted to evaluate 840 + 840 to 1120 + 1120 g ai ha-1 bentazon + atrazine for broadleaf weed control compared to 1680 g ha-1 atrazine. Carolina geranium and mouseear chickweed (Cerastium vulgatum L.) control was > 80% regardless of herbicide, rate, or evaluation date. White clover (Trifolium repens L.) control was greater than or equal to 78% at 20 d after treatment, but declined to less than or equal to 68% by 65 d after treatment. From 37 to 65 d after treatment, lawn burweed [Soliva pterosperma (Juss) Less.] control was > 80%." |
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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):
Kelly, S. T., and G. E. Coats. 1992. Winter weed control in southern turfgrasses. South. Weed Sci. Soc. Proc. 45:p. 132. |
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MSU catalog number: SB 611 .S6 |
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