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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1996/Environmental/47084,%20U%20Florida,%20Snyder.PDF
Last checked: 11/05/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Snyder, George H.; Cisar, John L. |
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| Author Affiliation: | Snyder: University of Florida, IFAS, Everglades Research and Education Center, Belle Glade, FL; and Cisar: University of Florida, IFAS, Ft. Lauderdale Research and Education Center, Ft. Lauderdale, FL |
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| Monograph Title: | Mobility and Persistence of Turfgrass Pesticides in a USGA Green: [1996 Annual Research Report], 1996. |
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| Publishing Information: | [Gainesville, Florida]: University of Florida, IFAS |
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| # of Pages: | 32 |
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| Collation: | [1], 21, [10] pp. |
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| Abstract/Contents: | "The use of reduced irrigation for one week following fenamiphos application was studied as a means of reducing fenamiphos/metabolite leaching in a USGA green in south Florida. Leaching was reduced during the period of limited irrigation, but total leaching was equivalent for low and high irrigation treatments over a longer period that included plentiful irrigation and rainfall. It appeared that the fenamiphos and its metabolites that were not leached when irrigation was restricted eventually leached when excessive irrigation and rainfall occurred. The percolate collection system in the USGA green at the Ft. Lauderdale Research and Education Center was expanded to include twelve lysimeters. This will permit greater numbers of replications in studies involving two or more treatments, which is very important for pesticide studies. During excavation it was noted that 7 cm of topdressing had accumulated on the green since the lysimeters were first installed. This layer appeared to hold more water than the underlying media. It contained somewhat higher percentages of the finer sand sizes. It also had considerable [considerably] more organic matter than either the original rooting mix or than the topdressing material. No movement of rootzone into the coarse sand layer, or of coarse sand into the underlying gravel was observed during excavation for the newly-added lysimeters. Volatilization of the organophosphate pesticides isazofos, chlorpyrifos, and fenamiphos was measured in two studies using the Theoretical Profile Shape technique. Volatilization was greatest for chlorpyrifos, and least for fenamiphos. It was less for an application that was followed by the rainfall than for one followed by dry weather. Isazofos volatilization amounted to 1 and 9% of that applied for the two rainfall situations, respectively. Fenamiphos and fenamiphos metabolite adsorption by a stabilized organic polymer (SOP) was investigated in the laboratory. It was determined that when mixed with sand at the rate of 15% by volume, SOP could retain an amount of metabolite equivalent to the recommended rate of fenamiphos. Sufficient SOP of has been prepared for field studies on the USGA green. The principal investigators each spent approximately 40% of their time on the project, and other University personnel contributed approximately 2.5 full-time equivalents. Grant funds were utilized as 73% for labor, 13% for supplies, and 14% for university-withheld overhead." |
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| Language: | English |
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| References: | 8 |
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| See Also: | See also related summary article "Mobility and persistence of turfgrass pesticides in a USGA green" 1996 Turfgrass and Environmental Research Summary, 1996. pp. 64-65, R=47084. R=47084 |
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| Note: | Also appears as pp. 00109-00140 in the USGA Turfgrass Research Committee Reporting Binders for 1996.
"Annual Report - November 1, 1996"
Includes "Appendix"; pp. 21-[10]
Figures
Tables
Graphs |
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Last checked: 11/05/2013
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