Skip to Content.
Sympa Menu

nafex - [nafex] Fwd: PAECILOMYCES ROT, APPLE

nafex@lists.ibiblio.org

Subject: North American Fruit Explorers mailing list at ibiblio

List archive

Chronological Thread  
  • From: Elizabeth Hilborn <ehilborn@mebtel.net>
  • To: North American Fruit Explorers <nafex@lists.ibiblio.org>
  • Subject: [nafex] Fwd: PAECILOMYCES ROT, APPLE
  • Date: Fri, 6 Apr 2018 19:18:05 -0400

FYI from ProMed mail

PAECILOMYCES ROT, APPLE - USA: (NEW YORK), NEW DISEASE
******************************************************
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: Mon 2 Apr 2018
Source: WHCU News Talk Radio [edited]
<http://whcuradio.com/news/025520-apple-mold-confounds/>


A mold found in more than a 3rd of the soil samples from New York State apple
orchards is causing a new disease, spoiling apples, even after heat
pasteurization. The state is the top producer of processed apple products and
they all rely on pasteurization.

Cornell's Kathie Hodge and Megan Biango-Daniels investigated the origins of a
newly discovered apple disease called Paecilomyces Rot, caused by the common
fungus found in 34 per cent of state orchards.
Previously, scientists believed the fungus was coming from soil
contamination, but Hodge and Biango-Daniels believe other infected apples are
the primary source.

Since this new apple disease appears similar in appearance to others, the
scientists suggest apple producers isolate any of the fruit with wounds or
bruising in order to avoid the spread of Paecilomyces Rot.

--
Communicated by:
ProMED-mail
<promed@promedmail.org>

[The fungus causing this new disease has been identified as _Byssochlamys
lagunculariae_ (previously _Paecilomyces niveus_; see source link below). The
external fruit rot develops mainly in storage after harvest and symptoms
appear to be similar to fruit rots due to other fungi. Susceptibility may
vary somewhat between apple cultivars.
The fungus survives in orchard soils and on decaying plant material.

The significance of this report is stated as (1) the production of a
mycotoxin, and (2) the fungus remaining infectious after commercial
pasteurisation. Spores are reported to be tolerant of temperatures of up to
90 degrees Celsius [194 F] and are suspected to be the cause of spoilage of
canned products, leading to severe economic losses for the affected apple
producers. This pathogen also appears to facilitate secondary infections by
other fungi.

Other species in the genus _Byssochlamys_ are also known to produce
mycotoxins and form heat resistant ascospores. They have been reported from
soils in many areas and can cause problems, for example, in grapevine and
tomato products.

Maps
USA:
<http://www.mapsofworld.com/usa/>
Individual states via:
<http://www.mapsofworld.com/usa/states/>

Pictures
Apple with paecilomyces rot:
<http://news.cornell.edu/sites/default/files/styles/breakout/public/2018-03/0329_apple.jpg>
_B. lagunculariae_, microscopy:
<https://www.researchgate.net/profile/Jos_Houbraken/publication/41669957/figure/fig4/AS:202806704250901@1425364295000/Byssochlamys-lagunculariae-a-d-Conidiophores-e-conidia-f-asci-and-ascospores-Bys.png>

Links
Additional news story and source study (accepted for publication):
<http://news.cornell.edu/stories/2018/03/new-apple-disease-spoils-even-
pasteurized-foods> (thanks to G. Jackson, Pestnet) and
<https://apsjournals.apsnet.org/doi/10.1094/PDIS-12-17-1896-RE>
Information on genus _Byssochlamys_ and associated diseases:
<https://www.ncbi.nlm.nih.gov/pmc/articles/PMC243237/>,
<https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2789542/> and via
<https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/byssochlamys>
_B. lagunculariae_ taxonomy and synonyms:
<http://www.speciesfungorum.org/GSD/GSDspecies.asp?RecordID=512557>
and
<http://www.speciesfungorum.org/Names/SynSpecies.asp?RecordID=512557>.
- Mod.DHA]

[See Also:
2017
----
Crown & root rot, apple - USA: (eastern)
http://promedmail.org/post/20170821.5263568
2012
----
Fungal diseases, apple - USA: (NY, MI)
http://promedmail.org/post/20120906.1282861
2005
----
Canker and twig dieback, apple, pear - USA (WA)
http://promedmail.org/post/20051015.3001]
.................................................sb/dha/ec/dk




  • [nafex] Fwd: PAECILOMYCES ROT, APPLE, Elizabeth Hilborn, 04/06/2018

Archive powered by MHonArc 2.6.24.

Top of Page