Re-evaluation of Seed Transmission of Clavibacter michiganensis subsp. nebraskensis in Zea mays Robertson, Alison Block, Charles Shepherd, Lisa Mbofung-Curtis, Gladys Sernett, Jeff Robertson, Alison
dc.contributor.department Plant Pathology and Microbiology
dc.contributor.department Seed Science Center 2022-01-14T23:02:14.000 2022-01-19T07:04:49Z 2022-01-19T07:04:49Z Mon Jan 01 00:00:00 UTC 2018 2019-11-09 2018-11-09
dc.description.abstract <p>The spread of Goss's bacterial wilt and leaf blight of corn (<em>Zea mays</em>), caused by <em>Clavibacter michiganensis</em> subsp. <em>nebraskensis</em>, to a wider geographic range in the early 2000s compared with the late 1960s has generated concern about the possible role of seed transmission in long-distance spread. The objectives of this research were: (1) to determine the percentage of seed infection found in seed harvested from inoculated and noninoculated plants of hybrids that varied in resistance to Goss's wilt; and (2) to estimate the seed transmission rate from these infected seed lots. The greatest percent seed infection was detected in seed from inoculated plants of the most susceptible hybrid and the least in seed from the most resistant hybrid. Seed lots with seed infection that ranged from 3.6 to 37.0% were planted in three field and three greenhouse trials. A total of 12 seed transmission events (Goss's wilt symptomatic seedlings) were identified among 241,850 plants examined, for a seed transmission rate of 0.005%. When the seed transmission rate was recalculated to consider only the infected seed portion of each seed lot, the rate increased to 0.040% (12 events from 30,088 potentially infected plants). Based on the low seed transmission rate observed and previous research on disease spread from a point source, it seems unlikely that seed transmission could introduce enough inoculum to create a serious disease outbreak in a single growing season. However, risk of seed transmission is relevant for phytosanitary restrictions and preventing the introduction of the pathogen to new areas. To date, Goss's wilt has not been detected outside North America, and while the risk of seed transmission is very low, the risk is not zero. Fortunately, the presence of <em>C. michiganensis</em> subsp. <em>nebraskensis</em> in corn seed is readily detectable by established seed health testing methods.</p>
dc.description.comments <p>This article is published as Block, Charles C., Lisa M. Shepherd, Gladys C. Mbofung-Curtis, Jeff M. Sernett, and Alison E. Robertson. "Re-evaluation of Seed Transmission of Clavibacter michiganensis subsp. nebraskensis in Zea mays." <em>Plant Disease</em> (2018). doi: <a href="">10.1094/PDIS-02-18-0292-RE</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 1262
dc.identifier.contextkey 13318555
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath plantpath_pubs/261
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 23:02:13 UTC 2022
dc.source.bitstream archive/|||Fri Jan 14 23:02:14 UTC 2022
dc.source.uri 10.1094/PDIS-02-18-0292-RE
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Plant Pathology
dc.title Re-evaluation of Seed Transmission of Clavibacter michiganensis subsp. nebraskensis in Zea mays
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 3af53836-8d87-4424-a6ca-b087069a2945