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]
|
|