The roles of Verticillium dahliae, Colletotrichum atramentarium, Erwinia carotovora subsp. carotovora and E. carotovora subsp. atroseptica in "early dying" disease of potatoes Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/c534fs708

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • The primary cause of "early dying" disease of potatoes in Oregon is Verticillium dahliae; however, Colletotrichum atramentarium, Erwinia carotovora subsp. carotovora (Ecc) and E. carotovora subsp. atroseptica (Eca) are also commonly isolated from diseased plants. Therefore, field and greenhouse studies were initiated to determine the relative involvement of each pathogen, directly and/or interactively with V. dahliae in the disease. Pathogenicity studies with 'Russet Burbank' potatoes were carried out in greenhouse pot culture to determine if C. atramentarium, Ecc and Eca can cause "early dying" disease similar to that caused by V. dahliae. Fifty-three days after root-dip inoculation, plants inoculated with Ecc, Eca or V. dahliae exhibited typical "early dying"disease symptoms, whereas those inoculated with C. atramentarium did not. Symptoms caused by V. dahliae were more severe than those caused by Ecc or Eca. In field studies with 'Norgold Russet' potatoes in 1980 (Columbia Basin and Klamath Basin) and in 1981 (Columbia Basin and Wallowa Valley), plant infection by V. dahliae was most strongly associated with symptom expression in plots previously cropped several times to potatoes; whereas plant infection by Ecc or Eca was most strongly associated with symptom expression in plots previously cropped one year or less to potatoes. In basal stem isolations made late in "early dying" disease epidemics, reductions were observed in the recovery of Eca and of V. dahliae. Decreases in Eca recovery were linked to plant infection by V. dahliae, whereas decreases in V. dahliae recovery were caused by basal plant infection by C. atramentarium. In co-inoculation studies the severity of symptom expression in V. dahliae inoculated 'Russet Burbank' was increased by Eca or Ecc, but was not influenced by C. atramentarium. The effect of V. dahliae and Eca, or V. dahliae and Ecc, on symptom expression was additive, rather than synergistic, and was due to an enhancement of stem colonization by V. dahliae.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Submitted by Katy Davis (kdscannerosu@gmail.com) on 2013-10-02T20:48:33Z No. of bitstreams: 1 KirklandMarjorieL1983.pdf: 517217 bytes, checksum: e872e93389ffc4bfe2e4bfdfaa73ef6b (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-10-03T15:42:30Z (GMT) No. of bitstreams: 1 KirklandMarjorieL1983.pdf: 517217 bytes, checksum: e872e93389ffc4bfe2e4bfdfaa73ef6b (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-10-02T21:19:00Z (GMT) No. of bitstreams: 1 KirklandMarjorieL1983.pdf: 517217 bytes, checksum: e872e93389ffc4bfe2e4bfdfaa73ef6b (MD5)
  • description.provenance : Made available in DSpace on 2013-10-03T15:42:30Z (GMT). No. of bitstreams: 1 KirklandMarjorieL1983.pdf: 517217 bytes, checksum: e872e93389ffc4bfe2e4bfdfaa73ef6b (MD5) Previous issue date: 1982-06-17

Relationships

In Administrative Set:
Last modified: 08/23/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items