A ProMED-mail post <http://www.promedmail.org>
ProMED-mail is a program of the International Society for Infectious Diseases <http://www.isid.org>
Date: Thu 13 Jul 2017
Source: The Argus Observer [edited]
<http://www.argusobserver.com/news/onion-disease-stymies-researchers/article_696107e0-67ed-11e7-b2a7-6b69289da343.html>
[A] disease issue being tackled is an onion rot, which starts at the top of the bulb. Eric Feibert, Malheur Experiment Station [Oregon State University] said the source of the problem is not known. Also unknown is when the rot starts to happen. The rot prevents onions from being fully developed. The disease can develop in the field or in storage.
Feibert is leading research on 2 varieties of onions and said those onions are checked on a weekly basis to try and see when the disease shows up. In another trial some [of] the research is focusing on whether heat may be a cause or partly a cause of the rot.
[Byline: Larry Meyer]
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Communicated by: ProMED-mail <promed@promedmail.org>
[It appears that a causal pathogen of the rot may not have been diagnosed as yet. Identification of a potential infectious pathogen would be essential before being able to assess whether external factors, such as heat mentioned above, may favour disease development.
Maps
USA (with states):
<http://www.mapsofworld.com/usa/usa-state-and-capital-map.html> and <http://healthmap.org/promed/p/239>
Pictures
Photo gallery of onion diseases:
<http://www.ipmimages.org/browse/AreaSubs.cfm?area=86>
Links
List of major diseases and pathogens of onion (and garlic):
<http://www.apsnet.org/publications/commonnames/Pages/OnionandGarlic.aspx>
Information on some onion diseases:
<http://www.omafra.gov.on.ca/english/crops/facts/95-063.htm> and <http://vegetablemdonline.ppath.cornell.edu/factsheets/Onions_List.htm>
Malheur Experiment Station:
<http://www.cropinfo.net/>
- Mod.DHA]
[See Also:
2016
----
Anthracnose & purple blotch, onion - Philippines: (IN)
http://promedmail.org/post/20160729.4378522
Stemphylium blight, onion - Kenya: (KB)
http://promedmail.org/post/20160104.3910614
2013
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Purple blotch, onion - Kenya: (RV) susp.
http://promedmail.org/post/20130307.1574551
2011
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Undiagnosed disease, onion - Mexico: (BN)
http://promedmail.org/post/20111031.3232
Undiagnosed disease, onion - Nigeria: (KE), RFI
http://promedmail.org/post/20110117.0196
Purple blotch & anthracnose, onion - India: (MH)
http://promedmail.org/post/20110103.0024
2010
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Bacterial blight, onion - Argentina
http://promedmail.org/post/20100709.2288
Undiagnosed disease, onion - Mexico: (MR), RFI
http://promedmail.org/post/20100213.0509
and additional items on onion diseases in the archives]
Topics
Species
