dc.contributor.author	McDonald, Sharon Angella	en
dc.contributor.committeecochair	Tolin, Sue A.	en
dc.contributor.committeecochair	Nault, Brian A.	en
dc.contributor.committeemember	Pfeiffer, Douglas G.	en
dc.contributor.committeemember	Mack, Timothy P.	en
dc.contributor.committeemember	Nault, Lowell R.	en
dc.contributor.department	Entomology	en
dc.date.accessioned	2014-03-14T20:08:20Z	en
dc.date.adate	2001-03-22	en
dc.date.available	2014-03-14T20:08:20Z	en
dc.date.issued	2001-02-22	en
dc.date.rdate	2002-03-22	en
dc.date.sdate	2001-03-21	en
dc.description.abstract	Production of hot peppers, Capsicum spp., in Jamaica is constrained by the aphid-transmitted potyviruses, tobacco etch virus (TEV) and potato virus Y (PVY). The virus epidemiology was not understood and no effective virus management system existed for these viruses. This study sought to identify possible management strategies for aphid-transmitted viruses of hot peppers in Jamaica, using TEV and Capsicum chinense, var. 'Scotch Bonnet' and 'West Indian Red', as models. Field spread of TEV to pepper was mainly by secondary spread from primary infections. Secondary infections were spatially correlated to primary infections for up to 25 meters. Natural infections of TEV were associated with aphid flight activity. Over 30 species of aphids were collected on pepper farms in St. Catherine parish. These aphids included five known vectors of TEV, Aphis gossypii Glover, A. craccivora Koch, A. spiraecola Patch, Lipaphis erysimi Hille Ris Lambers and M. persicae (Sulzer), and 12 new records for Jamaica, Aphis amaranthi Holman, Brachycaudus helichrysi (Kaltenbach),Capitophorus hippophaes (Walker), Geopemphigus floccosus (Moreira), Hysteroneura setariae (Thomas), Lipaphis erysimi Hille Ris Lambers, Rhopalosiphum padi (Linnaeus), Schizaphis graminum (Rondani), Schizaphis rotundiventris (Signoret), Trichosiphonaphis poligoni (van der Goot), Uroleucon ambrosiae complex (Thomas) and Uroleucon pseudoambrosiae (Olive). A. amaranthi and U. ambrosiae were associated with TEV spread. Weeds on and near farms influenced the abundance and species of aphids captured. West Indian Red pepper showed tolerance to TEV. Scotch Bonnet pepper yield reduction was greater if plants were infected with TEV during the vegetative stage through flower initiation rather than after the start of fruit set. Stylet oil and reflective mulch used together delayed the incidence of TEV in pepper plots for over two months. TEV management programs should aim to delay the virus from infecting peppers during the first two months after transplanting. A risk analysis is proposed for management of TEV and other aphid-borne viruses.	en
dc.description.degree	Ph. D.	en
dc.identifier.other	etd-03212001-144228	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-03212001-144228/	en
dc.identifier.uri	http://hdl.handle.net/10919/26468	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	CHAPTER_3.pdf	en
dc.relation.haspart	CHAPTER_1.pdf	en
dc.relation.haspart	CHAPTER_2.pdf	en
dc.relation.haspart	VITA.pdf	en
dc.relation.haspart	CHAPTER_6.pdf	en
dc.relation.haspart	CHAPTER_5.pdf	en
dc.relation.haspart	CHAPTER_4.pdf	en
dc.relation.haspart	FRONT_MATTER.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	seasonal abundance	en
dc.subject	yield	en
dc.subject	reflective mulch	en
dc.subject	geostatistics	en
dc.subject	stylet oil	en
dc.subject	time of infection	en
dc.title	Epidemiology, Aphid Vectors, Impact and Management of Tobacco Etch Potyvirus in Hot Peppers in Jamaica	en
dc.type	Dissertation	en
thesis.degree.discipline	Entomology	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	doctoral	en
thesis.degree.name	Ph. D.	en

Epidemiology, Aphid Vectors, Impact and Management of Tobacco Etch Potyvirus in Hot Peppers in Jamaica

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