Interaction Between Insects and Apple (Malus X Domestica Borkh.): Insect Behavior, Genotypic Preference, and Plant Phenolics With Emphasis on Japanese Beetle (Popillia Japonica Newman)

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dc.contributor.authorTeparkum, Sirasaken
dc.contributor.committeechairMarini, Richard P.en
dc.contributor.committeememberKok, Loke T.en
dc.contributor.committeememberVeilleux, Richard E.en
dc.contributor.committeememberBarden, John A.en
dc.contributor.committeememberPfeiffer, Douglas G.en
dc.contributor.departmentHorticultureen
dc.date.accessioned2014-03-14T20:12:39Zen
dc.date.adate2000-06-05en
dc.date.available2014-03-14T20:12:39Zen
dc.date.issued2000-05-02en
dc.date.rdate2001-06-05en
dc.date.sdate2000-05-31en
dc.description.abstractLeaves and fruit of nine apple (Malus x domestica Borkh.) genotypes were evaluated for insect injury in 1998 and 1999. Foliar and fruit injury from 12 insect species was inconsistently affected by genotype. Spraying trees with oil affected neither fruit insect injury nor fruit phytotoxicity. In choice feeding assays, incidence of Japanese beetle (JB) feeding and leaf area consumed was greater for 'Liberty' than for 'York.' Genotypes did not differ in no-choice feeding assays. Choice and no-choice feeding assays between apple and oak indicated that JB could distinguish host plants in an artificial environment. Trichome density appeared different among three genotypes. 'York', the non-preferred genotype, had highest specific leaf weight and concentration of phloridzin, a feeding repellent. 'Liberty' the preferred genotype, had the lowest specific leaf weight, and had the highest concentration of quercitrin, a feeding stimulant. Olfactory stimuli of JB was evaluated with a Y-tube olfactometer. Beetles preferred the side of the Y-tube containing leaf tissue of apple or Virginia creeper over the side with no leaf. Beetles did not choose one plant species over the other. Bias test of beetle orientation in the Y-tube olfactometer indicated that in the morning, but not the afternoon, beetles preferentially moved into the left side of the Y-tube. Humidity did not affect beetle orientation. In darkness JB preferred a leaf disc over a paper disc and beetles tended to remain on the leaf.en
dc.description.degreePh. D.en
dc.identifier.otheretd-05312000-23280030en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05312000-23280030/en
dc.identifier.urihttp://hdl.handle.net/10919/27920en
dc.publisherVirginia Techen
dc.relation.hasparttony3.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectMalus domesticaen
dc.subjectTrichomeen
dc.subjectRefined oilen
dc.subjectJapanese beetleen
dc.subjectY-tube olfactometeren
dc.titleInteraction Between Insects and Apple (Malus X Domestica Borkh.): Insect Behavior, Genotypic Preference, and Plant Phenolics With Emphasis on Japanese Beetle (Popillia Japonica Newman)en
dc.typeDissertationen
thesis.degree.disciplineHorticultureen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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