Ophiostomatales isolated from two European bark beetles, <i>Hylurgus ligniperda</i> and <i>Orthotomicus erosus</i>, in California

dc.contributor.advisor Harrington C. Thomas
dc.contributor.author Kim, Sujin
dc.contributor.department Plant Pathology and Microbiology
dc.date 2018-08-11T16:51:46.000
dc.date.accessioned 2020-06-30T02:38:34Z
dc.date.available 2020-06-30T02:38:34Z
dc.date.copyright Fri Jan 01 00:00:00 UTC 2010
dc.date.embargo 2013-06-05
dc.date.issued 2010-01-01
dc.description.abstract <p>Two European pine-infesting bark beetles, <i>Hylurgus ligniperda</i> and <i>Orthotomicus erosus</i>, were first detected in July 2003 in Los Angeles, California and in May 2004 in the Central Valley of California, respectively. These bark beetles (Coleoptera: Curculionidae: Scolytinae) are common vectors of fungi in the Ophiostomatales, some of which are tree pathogens or causal agents of blue stain of conifer sapwood. Ophiostomatales were isolated on a cycloheximide-amended medium, which is semi-selective for the growth of <i>Ophiostoma</i> and related genera. In total, eight identified species and seven unidentified species of Ophiostomatales were isolated from 118 adults of <i>H. ligniperda</i> collected from infested pine logs at two sites in California. In the case of <i>H. ligniperda</i>, <i>Ophiostoma ips</i> and <i>Grosmannia galeiforme</i> were isolated from 31% and 23% of the 118 beetles, respectively. The other species isolated included <i>O. piceae</i> (isolated from 9% of the beetles), <i>O. querci</i> (8%), and a new species that will be described as <i>Leptographium tereforme</i> (6%). <i>Grosmannia huntii</i>, <i>L. serpens</i>, three <i>Sporothrix</i> spp., <i>O. floccosum</i>, <i>O. stenoceras</i>, two unidentified <i>Hyalorhinocladiella</i> spp., and a sterile fungus were each isolated from less than 5% of the beetles. In contrast, one identified species and four unidentified species of Ophiostomatales were isolated from 202 adults of <i>O. erosus</i> collected from infested pines at four sits in California. <i>Ophiostoma ips</i> was isolated from 85% of the 202 adults of <i>O. erosus</i>. Beside <i>O. ips</i>, a sterile fungus was isolated with 16% frequency, and two <i>Sporothrix</i> spp. and a species of <i>Hyalorhinocladiella</i> were isolated with fewer than 3% of the <i>O. erosus</i>. Most of the identified species were previously known in the USA and have been found in association with <i>H. ligniperda</i> or <i>O. erosus</i> in other countries. However, the new species, tentatively named <i>L. tereforme</i>, and <i>G. galeiforme</i> were recorded from the USA for the first time, and this is the first report of <i>L. serpens</i> from western North America.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/11842/
dc.identifier.articleid 2861
dc.identifier.contextkey 2808059
dc.identifier.doi https://doi.org/10.31274/etd-180810-2015
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/11842
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/26048
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/11842/Kim_iastate_0097M_10987.pdf|||Fri Jan 14 18:59:38 UTC 2022
dc.subject.disciplines Plant Pathology
dc.subject.keywords European bark beetle
dc.subject.keywords Grosmannia galeiforme
dc.subject.keywords Leptographium serpens
dc.subject.keywords Leptographium tereforme
dc.subject.keywords Ophiostomatales
dc.title Ophiostomatales isolated from two European bark beetles, <i>Hylurgus ligniperda</i> and <i>Orthotomicus erosus</i>, in California
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication a26b5928-54bb-4a0b-a973-95d649d1ad83
thesis.degree.level thesis
thesis.degree.name Master of Science
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