dc.contributor.author	Rideout, Steven L.	en
dc.contributor.committeecochair	Eisenback, Jonathan D.	en
dc.contributor.committeecochair	Johnson, Charles S.	en
dc.contributor.committeemember	Wilkinson, Carol A.	en
dc.contributor.committeemember	Reed, T. David	en
dc.contributor.department	Plant Pathology, Physiology, and Weed Science	en
dc.date.accessioned	2014-03-14T20:49:17Z	en
dc.date.adate	1998-12-16	en
dc.date.available	2014-03-14T20:49:17Z	en
dc.date.issued	1998-12-02	en
dc.date.rdate	2012-04-12	en
dc.date.sdate	1998-12-10	en
dc.description.abstract	Tobacco cyst nematodes (TCN), Globodera tabacum solanacearum, are one of the most serious pests for Virginia flue-cured tobacco (Nicotiana tabacum L.) farmers. These nematodes continue to spread to new farms every year and are now reported in 11 Virginia counties, seven North Carolina counties, and one farm in Maryland. The objectives of this study were to determine the ability of different populations of TCN to reproduce upon both a susceptible (K326) and resistant (NC567) cultivar, to compare TCN reproduction in non-infested soils with currently TCN-infested soils, and to examine reproduction and pathogenicity of TCN on other solanaceous crops. Tobacco cyst nematode reproduction on the TCN-resistant cultivar NC567 was significantly reduced when compared to the TCN-susceptible cultivar K326. Although significant differences among the populations were detected on both cultivars, the differences were not consistent across experiments. Results indicate similar pathogenicity among TCN populations on resistant and susceptible flue-cured tobacco cultivars. Plant breeders may use one population of the tobacco cyst nematode to screen tobacco germplasms for TCN resistance. Significant differences were noted in TCN reproduction among the various soils used in this study. However, the differences were inconsistent, making correlations between TCN reproduction and soil edaphic characteristics unreliable. Sterilizing the soils did not increase TCN reproduction. Reproduction in non-infested soils indicates that TCN will continue to spread throughout tobacco producing regions. Although traditionally an exclusive pest of tobacco, TCN's spread may threaten production of other solanaceous crops. Eggplant (Solanum melongena L.), pepper (Capsicum spp. L.), and tomato (Lycopersicon spp. L.) were confirmed to be hosts of TCN under field conditions. Eggplant was highly susceptible to TCN reproduction and yield suppression, exhibiting a 64% yield reduction in plots not treated with a nematicide compared to fumigated plots. Tomato allowed high rates of TCN reproduction but did not suffer yield loss. Tobacco cyst nematode reproduction was suppressed on pepper compared to the other two crops. No crop loss was noted in nontreated pepper plots compared to plots treated with a nematicide. Results would indicate that tobacco rotations including tomato or eggplant would be unacceptable due to high TCN reproduction rates. The tobacco cyst nematode does not seem to jeopardize the production of tomato and pepper in the southeastern United States, but does threaten profitability of eggplant production in this area.	en
dc.description.degree	Master of Science	en
dc.identifier.other	etd-121098-121011	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-121098-121011/	en
dc.identifier.uri	http://hdl.handle.net/10919/36056	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	Vita.pdf	en
dc.relation.haspart	Ch1Lit.pdf	en
dc.relation.haspart	Ch4Host.pdf	en
dc.relation.haspart	Ch3Soil.pdf	en
dc.relation.haspart	Front.pdf	en
dc.relation.haspart	Ch2Pops.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	tobacco	en
dc.subject	epidemiology	en
dc.subject	resistance	en
dc.subject	Globodera tabacum solanacearum	en
dc.title	The Effect of Nematode Isolate and Soil Environment on the Tobacco cyst Nematode (Globodera tabacum solanacearum), a Pathogen of Flue-cured Tobacco and Other Solanaceous Crops	en
dc.type	Thesis	en
thesis.degree.discipline	Plant Pathology, Physiology, and Weed Science	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

The Effect of Nematode Isolate and Soil Environment on the Tobacco cyst Nematode (Globodera tabacum solanacearum), a Pathogen of Flue-cured Tobacco and Other Solanaceous Crops

Files

Original bundle

Collections