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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Nash, D. L.;
Kay, S. H.;
DiPaola, J. M. |
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| Author Affiliation: | Crop Science Department, North Carolina State University, Raleigh, NC |
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| Title: | Effects of fluridone in irrigation water on four warm-season 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. 137. |
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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: Irrigation; Fluridone; Warm season turfgrasses
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| Abstract/Contents: | "Floating aquatic weeds such as watermeal (Wolffia columbiana Karst.) are serious problems in many golf course irrigation ponds in North Carolina. These weeds interfere with irrigation operations by clogging intake screens and irrigation heads. Presently, fluridone is the only effective control for this weed in irrigation ponds. However, very little is known about the influence of fluridone in irrigation water on turfgrasses. Plots (1'*3') of Tifgreen Bermudagrass [(Cynodon dactylon (L.) Pers.* C. transvaalensis, Burtt-Davy)], Tifway Bermudagrass [(Cynodon dactylon (L.) Pers.* C. transvaalensis, Burtt-Davy)], Vamont Bermudagrass (Cynodon dactylon), and Meyers Zoysiagrass (Zoysia japonica) were established from sod laid on Enon fine sandy loam soil. Root frames (1'*1') were installed in the center of each plot prior to sod placement. An irrigation pond adjacent to the plots was treated at the maximum labelled rate of 150 micrograms/liter of fluridone to control watermeal. Six irrigation series, beginning with series 0 on the same day the pond was treated with fluridone (day 0), were initiated. Series 1, 2, 3, 4, and 6 were scheduled to begin at 7, 14, 21, 28, and 42 days respectively after pond treatment. Untreated pond water, taken from the pond prior to treatment, was stored in wading pools and used to irrigate control plots. Treated and control plots were hand watered on the same day at a rate of 0.25" per plot. Plots were watered every two days unless the soil was saturated due to rainfall. Water from the pond was collected beginning on the day of treatment and then at weekly intervals for later analysis to determine fluridone content. Plots were mowed at a two inch cutting height every five to seven days. All plots were rated weekly for turf quality and color. A scale of 1 to 10 was used with 10 indicating excellent quality and/or color and 5 indicating minimumly acceptable quality and/or color. Any fluridone symptoms on the turf, or on weeds present in the plots, were noted. Eight weeks after an irrigation series had begun, the root frames for that series were pulled using an electric hoist attached to the root frame. Measurements for root development, root length, and total root plug weight were recorded. Root plugs were placed back in the same hole and allowed to re-establish. This study indicated that color, quality, root development, and root length for the four turfgrasses tested were not significantly influenced by irrigation water treated with fluridone when grown on the soil type, and under the conditions, of this study. No significant differences occurred between irrigation series. Differences between turfgrass varieties were significant, but this was expected. Further testing is planned to determine if other soil types will produce results different from those found in this study." |
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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):
Nash, D. L., S. H. Kay, and J. M. DiPaola. 1992. Effects of fluridone in irrigation water on four warm-season turfgrasses. South. Weed Sci. Soc. Proc. 45:p. 137. |
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MSU catalog number: SB 611 .S6 |
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