Hymenopterous parasites of lps spp. bark beetles (Coleoptera:Scolytidae) in Virginia

Simple item page
dc.contributor.authorBerisford, C. Wayneen
dc.contributor.committeechairHeikkenen, Herman Johnen
dc.contributor.committeechairMadgwick, H. A. I.en
dc.contributor.committeememberGrayson, James McD.en
dc.contributor.committeememberPienkowski, Robert L.en
dc.contributor.committeememberTurner, E. Craig Jr.en
dc.contributor.committeememberNeff, Stewart E.en
dc.contributor.departmentEntomologyen
dc.date.accessioned2014-03-14T21:22:39Zen
dc.date.adate2008-10-30en
dc.date.available2014-03-14T21:22:39Zen
dc.date.issued1968-06-19en
dc.date.rdate2008-10-30en
dc.date.sdate2008-10-30en
dc.description.abstractThe pine engraver beetles (~ spp.:Coleoptera:Scolytidae) may be serious pests depending on certain prerequisite conditions. In their secondary or "normal" role they breed in slash and damaged, dying, and dead trees. The broods emerging from these sources normally attack similar material. When such material is scarce due to cessation of cutting operations in mid-season or when conditions are especially favorable for brood development, an excess of beetles is often produced which, due to the lack of more suitable material, attack healthy trees. Repeated attacks cause these trees to succumb and die. When normally healthy trees are weakened by fire, flood, defoliation, drought, stagnation, etc., then they become more acceptable host material for successful engraver attacks. When the production of a very large number of beetles in "normal" breeding material coincides with physiological stress in "healthy" trees, then population explosions can occur. When large numbers of beetles and low host vigor do not coincide, spot kills cornnon1y occur. According to Thatcher (32), spot kills, although not conspicuous, add up to large volumes of timber loss each year.en
dc.description.degreePh. D.en
dc.format.extent117 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10302008-120438en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10302008-120438/en
dc.identifier.urihttp://hdl.handle.net/10919/40271en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1968.B4.pdfen
dc.relation.isformatofOCLC# 20731947en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1968.B4en
dc.subject.lcshBark beetles -- Virginiaen
dc.subject.lcshPine -- Diseases and pestsen
dc.titleHymenopterous parasites of lps spp. bark beetles (Coleoptera:Scolytidae) in Virginiaen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineEntomologyen
thesis.degree.grantorVirginia Polytechnic Instituteen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V856_1968.B4.pdf
Size:
3.73 MB
Format:
Adobe Portable Document Format
Download

Collections

Doctoral Dissertations