In 2011 and 2012, 100 residential lawns in the Baton Rouge, LA area were sampled to document the incidence of plant-parasitic nematodes, in addition four full-season microplot experiments and four 71-day duration greenhouse experiments were conducted to evaluate their pathogenicity on St. Augustine and centipede turfgrasses. Nematode genera associated with both turfgrasses included Criconemella, Helicotylenchus, Meloidogyne, Pratylenchus, Tylenchorynchus and Tylenchus spp. In microplot trials in 2012, nematodes did not cause significant damage to either turfgrass, but soil exhibited an effect on plant growth parameters. In 2013, when there was significant nematode related injury to both turfgrasses, there were no significant effects of soil on plant growth parameters. Greenhouse based pathogenicity trials were conducted separately with Meloidogyne incognita and Pratylenchus zeae. Across two levels of nematode infestation, reductions below controls for St. Augustine and centipede averaged 24% and 28% for M. incognita and 37.0% and 39.3% for P. zeae; indicating that overall, P. zeae was more damaging than M. incognita to both turfgrasses.
| Identifer | oai:union.ndltd.org:LSU/oai:etd.lsu.edu:etd-04142014-115743 |
| Date | 15 May 2014 |
| Creators | Plaisance, Addison Ray |
| Contributors | McGawley, Edward, Overstreet, Charles, Singh, Raghuwinder, Pontif, Michael, Beasley, Jeffrey |
| Publisher | LSU |
| Source Sets | Louisiana State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lsu.edu/docs/available/etd-04142014-115743/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached herein a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to LSU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below and in appropriate University policies, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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