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Clarification re. New strain of downy mildew in cucurbits - Charleston County, South Carolina, USA

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A ProMED-mail post
ProMED-mail is a program of the International Society for Infectious Diseases

A ProMED-mail post
<http://www.promedmail.org>
ProMED-mail is a program of the
International Society for Infectious Diseases <http://www.isid.org>

October 23, 2007
Source: Jeff Dodson <jeff.dodson@seminis.com>

Re: New strain of downy mildew in cucurbits - Charleston County, South Carolina, USA
[Concerning the additional information in this post about gummy stem blight]

.....you mention that "The fungus is seed-borne" when, in fact, this fungus CAN be seed-borne, but its spores may also be airborne or water-borne. Insects can spread the spores as well as irrigation water. This pathogen [of gummy stem blight of watermelon, that is, the fungus _Didymella bryoniae_] can carry over from growing season to growing season in an over-wintering structure as well. Wild cucurbits or volunteer hosts from previous crops can also play roles in allowing the pathogen to live in an area that is free of an agronomic crop until new plantings of cucurbits become available.

[There are] seed producers who make every attempt to insure that this fungus is not transmitted by their product.

--
Jeff Dodson
Seminis Vegetable Seeds, Inc.
2700 Camino del Sol
Oxnard, CA 93030
USA
<jeff.dodson@seminis.com>

[ProMED-mail apologizes for the delay in posting this communication. Mod.DK]

[Thank you to Mr Dodson for the clarification and additional information on gummy stem blight. With respect to all crop diseases that can be seed-borne, it is important to use only certified seed from reliable sources. - Mod.DHA]

[see also in the archive:
Downy mildew, cucurbits - USA: (SC), new strain 20071023.3448]
 

 

THIS ARTICLES REFERS TO

October 15, 2007

New strain of downy mildew in cucurbits - Charleston County, South Carolina, USA

 

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