Widely Prevalent Plant Pathogen Status – This map is based on data from the Widely Prevalent Fungi Project, a collabaration between USDA APHIS PPQ and . Twenty seven (27) isolates of Alternaria porri were isolated from diseased leaf samples collected from different onion growing regions of Bangladesh and. PDF | Effect of different culture media, pH levels and natural substrates on mycelial growth and sporulation of Alternaria porri and Stemphylium.

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altfrnaria Sanctioned by Sanctioning name Validated by Type specimen or ex type More specimens Human pathogenicity code Plant pathogenicity code Code toxicity. Catalogue of Life CoL. Specimens and strains links: Purple blotch is caused by the fungus Alternaria porri.

Discussion View source History. Avoid dense plantings of late maturing varieties. Alternaria porri Ellis Cif.

Alternaria porri

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Storage symptoms appear as a dark yellow to wine-red spongy rot of outer or inner scales of bulbs. Matches exactly Value is altrnaria. You may be, however, able to change your browser settings to cause your browser to refuse cookies in general, block third party cookies or to indicate when a cookie is being sent.

Phytopathological survey of Santo Domingo, Alternaria porri Ellis Cif.

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Using Google Analytics, we can see what content is popular on our websites. Current name Classification Type name Basionym Obligate or homotypic synonyms Anamorph synonyms Teleomorph synonyms Facultative or heterotypic synonyms Type of altfrnaria. The information is depersonalized and is displayed as numbers, meaning it cannot be traced back to individuals.

Copper fungicides are registered for control altfrnaria purple blotch, but are not highly effective. This Add-on is available at http: Pairwise identification Polyphasic identification.

Contact our curators Dr. Lily Eurwilaichitr and Dr. See below for more information. Encyclopedia of Life EOL. Reduce over- wintering and survival of the pathogens by eliminating culls, onion debris, and volunteers. Lesions are elongate, small, sunken and whitish with a purple center. Google Wikimedia Wikipedia Wikispecies. Concentric light and dark zones later appear over part or all of the purple area.

More Spanish version Dr. Contact your local extension service for the recommendations that are appropriate to your state. Common Names and Diseases. This page was last modified Privacy policy About Bugwoodwiki Disclaimers.


Practice a three-year or longer rotations to non-hosts such as small grains and corn. Plant high quality seed and transplants free from the purple blotch pathogen. Open the calendar popup. Apply adequate but not excessive nitrogen fertilizer before bulb initiation. Cookies are small text files that contain a string of characters and uniquely identifies a browser. Any condition s All condition s.

If you would like to know more about cookies and how they work, please visit www. For practical reasons we have decided not to translate all pages in several languages anymore because it was too heavy to maintain but some of the labels of the basic and advanced query pages are still available.

Run Zhang 1 and Dr. They are sent to a computer by website operators or third parties. Retrieved from ” http: The fungus is disseminated within and among fields by splashing water and wind, and overwinters in and on infested crop debris.

Undercut onion roots and harvest at full maturity when intact necks top over naturally, ideally during dry weather.