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Welcome to Alliumnet!

We are an organization focused on the production of allium species in the United States.

On our website, you will find information on the latest research, resources for diagnosing diseases and problems, links to regional extension resources, and grower associations’ notices about upcoming scientific meetings and archives of prior research meetings.

About Onions in the USA

Onion, Allium cepa L., is the third most consumed vegetable in the U.S.A, behind tomato and potato. The per capita consumption of onions in the U.S. is about 20 pounds per year, which has increased 70% over the… read more

About Alliumnet

Alliumnet is a collaborative effort focused on supporting the production of allium species in the United States.

Find information resources for researchers, extension staff, and producers on… read more

News and Recently Added Content

Novel species of pathogenic bacteria of onion identified in Texas

We’re sad to announce the passing of our colleague Steve Beer, Professor Emeritus at Cornell University. Please see the obituary here.

Stop the Rot researchers recently published several new Plant Disease Management Reports on the results of field trials in the first season of work. Reports are now available from three participating states (GA, WA, NY). Click Here to see the most current version of the Plant Disease Management Reports list.

Washington State Extension – WSU Onion Alerts, 2021: Issue 3

MacKay, H., and du Toit, L. 2021. Progress report. Stop the Rot: A national collaboration to research, combat bacterial diseases of onion. Onion World, May/June 2021:12-14. https://issuu.com/columbiamediagroup/docs/onion_world_may_june_2021/12

du Toit, L., and Waters, T. 2021. To disinfect or not? Can postharvest applications of disinfectants reduce bacterial bulb rots in storage? Onion World, July/August 2021:6-9. Onion World Magazine July/August 2021

du Toit, L.J., Waters, T., Derie, M., and Darner, J. 2020. Battling onion bacterial diseases with bactericides. Onion World, December 2020:6-11. https://issuu.com/columbiamediagroup/docs/onion_world_december_2020

Resources

Scientific journal articles

Agarwal Gaurav, Choudhary Divya, Stice Shaun P., Myers Brendon K., Gitaitis Ronald D., Venter Stephanus N., Kvitko Brian H., Dutta Bhabesh (2021). Pan-Genome-Wide Analysis of Pantoea ananatis Identified Genes Linked to Pathogenicity in Onion. Frontiers in Microbiology vol 12:2381

Koirala, Santosh & Zhao, Mei & Agarwal, Gaurav & Stice, Shaun & Gitaitis, Ronald & Kvitko, Brian & Dutta, Bhabesh. 2021. Identification of two novel pathovars of Pantoea stewartii subsp. indologenes affecting Allium sp. and millets. Phytopathology. 10.1094/PHYTO-11-20-0508-R.

Stumpf S, Leach L, Srinivasan R, Coolong T, Gitaitis R, Dutta B. Foliar Chemical Protection Against Pantoea ananatis in Onion Is Negated by Thrips Feeding. Phytopathology. 2021 Feb;111(2):258-267. doi: 10.1094/PHYTO-05-20-0163-R. Epub 2021 Jan 13. PMID: 32748732.

Learning resources

A new publication from the UGA team on bacterial streak and bulb rot of onion: bacterial streak and bulb rot of onion has been a problem in onion-growing regions of Georgia, USA since 1990. This disease can be a major limiting factor in onion production in other parts of the world. Weed species have been shown to serve as important inoculum sources for P. viridiflava (Gitaitis et al. 1998).

Explore other allium resources, information sources, and diagnostic resources here

Meetings

2022 Annual Onion Research Meetings in Denver, CO

Please join us on February 28^th and March 1^st 2022, for a joint meeting of the W3008 Multistate Onion Research Project, the National Allium Research Conference, and the ‘Stop the Rot’ SCRI onion bacteria research project.

See the meeting page for more information and registration links.

NOA Winter Meeting in Puerto Rico, December 1-4, 2021.
More information

NARC (National Allium Research Conference)
February 28, 2022, in Denver CO., Save the date!

W3008 Multistate Research Project annual meeting
February 28, 2022, in Denver CO. More information coming soon.

More items on the Calendar

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