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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Murphy, T. R. |
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| Author Affiliation: | The University of Georgia, Griffin, Georgia |
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| Title: | Seashore paspalum response to trinexapac-ethyl and paclobutrazol |
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| Section: | Weed management in turf, pasture, and rangeland
Other records with the "Weed management in turf, pasture, and rangeland" Section
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| Meeting Info.: | 55th Annual Meeting, Atlanta, GA: January 28-30, 2002 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 55, 2002, p. 68. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Seashore paspalum (Paspalum vaginatum Swartz) is a prostrate growing, salt tolerant grass that is indigenous to tropical and coastal areas worldwide. This grass can be irrigated with salt and brackish water and tolerates drought and low mowing heights. Traffic stress (wear) tolerance is similar to bermudagrass (Cynodon spp.). Because of these attributes improved cultivars of seashore paspalum have been recently released for use in the southern United States and tropical areas of the world. Various growth regulators are used commonly used on turfgrasses to reduce mowing requirements and/or problems with grass clippings. There is no published research on the response of seashore paspalum to turfgrass growth regulators commonly used in turfgrass management. Experiments were conducted in 2000 and 2001 at Griffin, GA to determine the tolerance of seashore paspalum (cv. `Sea Isle I') to summer applications of trinexapac-ethyl and paclobutrazol. Experiments were located on an established stand of seashore paspalum that was clipped at a mowing height of 0.75 and 0.625 inches in 2000 and 2001, respectively. Irrigation was applied as needed to prevent drought stress. Trinexapac-ethyl at at 0.09, 0.13, 0.17, 0.25 and 0.34 lbs. ai/acre, and paclobutrazol at 0.25, 0.37 and 0.5 lbs. ai/acre were applied in mid-July and followed by (fb) an application in mid-August of each year. Spray volume was 25 gpa. Plot size was 5 by 10 ft. Treatments were replicated 3 times and arranged in a randomized complete block design. Seashore paspalum injury and dry clipping weights were recorded at two wk intervals for up to 10 wks after the initial growth regulator application. The same plots were treated in both years. A repeated measures ANOVA showed no difference between years, thus data were combined for presentation. Paclobutrazol was essentially non-injurious to seashore paspalum and injury was < 5% at all evaluations. However, paclobutrazol did not effectively reduce seashore paspalum clipping weights. Trinexapac-ethyl at rates ā¤0.13 lbs. ai/acre injured seashore paspalum <20% at all evaluations. At rates of 0.17 and 0.25 lbs. ai/acre, trinexapac injured seashore paspalum > 20% at 2 of 5 evaluations. At the highest rate evaluated, 0.34 lbs. ai/acre, trinexapac-ethyl injured seashore paspalum > 20% at 3 of 5 evaluations. Trinexapac-ethyl was highly effective in reducing seashore paspalum clipping weights. Over the 10 wk evaluation period, two applications of trinexapac-ethyl at 0.09 lbs. ai/acre reduced seashoure paspalum dry clipping weights 57% compared to the untreated plot. The highest rate of trinexapac-ethyl, 0.34 lbs. ai/acre, applied twice, reduced clipping weights 90% over the same time period. This research showed that seashore paspalum vegetative growth can be effectively reduced over an extended time period with trinexapac-ethyl. However, on highly maintained seashore paspalum sites such as golf course fairways, rates of trinexapac-ethyl should be limited to no more than 0.13 lbs. ai/acre in order to avoid excessive injury (> 20%)." |
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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):
Murphy, T. R. 2002. Seashore paspalum response to trinexapac-ethyl and paclobutrazol. South. Weed Sci. Soc. Proc. 55:p. 68. |
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