ALTERNARIA PORRI PDF

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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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Lesions are elongate, small, sunken and whitish with a purple center. Bernard Jabas 1 and Dr. For more information, see the main Onion ipmPIPE website or the other resources provided in this wiki.

Initial symptoms appear on older leaves, usually late in the summer as spores are blown from infested debris.

Practice a three-year or longer rotations to non-hosts such as small grains and corn. Storage symptoms appear as a dark yellow to wine-red spongy rot of outer or inner alternaroa of bulbs. This page was last modified Journal of the Department of Agriculture of Porto Rico. Common Names and Diseases.

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Sanctioned by Sanctioning name Validated by Type specimen or ex type More specimens Human pathogenicity code Plant pathogenicity code Code toxicity.

Alternaria porri

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Encyclopedia of Life EOL. Privacy policy About Bugwoodwiki Disclaimers. Register new name species, genus, alhernaria, etc Register new type specimen of existing taxa epitype, neotype, etc.

Leaves wilt and die. Retrieved from ” http: Chemical controls are most effective when combined with sound cultural practices. Google Wikimedia Wikipedia Wikispecies.

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Contact your local extension service for the recommendations that are appropriate to your state. Discussion View source History. Cookies are small text files that contain a string of characters and uniquely identifies a browser. Purple blotch is caused by the fungus Alternaria porri.

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Alternaria porri Ellis Cif. Lily Eurwilaichitr and Dr.

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Avoid dense plantings of late maturing varieties. Undercut onion roots and harvest at full maturity when intact necks top over naturally, ideally during pori weather.

The pathogen may also be seed-borne. This Add-on is available at http: Pairwise identification Polyphasic identification. Plant high quality seed and transplants free from the purple blotch pathogen.

Alternaria porri

Contains Matches exactly Value is undefined. Copper fungicides are registered for control of purple blotch, but are not highly effective. Catalogue of Life CoL.