Here is the latest info (from an email from Josh Spence) about HVX:
----------------------------
At the AHS National Hosta Convention last month in Minnesota, Dr. Lockhart
gave the keynote speech on his most current research. This research was
sponsored by the AHS and on behalf of Rob Mortko (American Hosta Society
Vice President, Genus Hosta), I am posting the following...
Key takeaways from the most recent HVX research include:
-- There are no hosta cultivars that are more (or less) resistant to HVX
as had been previously reported. Hosta exposed to HVX while actively
growing will likely become infected. However infecting a healthy hosta
with HVX in the fall is very difficult as it is approaching dormancy. This
would imply that hosta division would be better undertaken in the fall
rather than in the spring.
-- HVX is spread by sap via cutting tools. Dishwashing detergent, 70%
alcohol or a 10% solution of household bleach (1 part bleach and 9 parts
water) are all effective in cleaning and disinfecting cutting tools.
However simply dipping the tool in the solution is not sufficient.
Thorough scrubbing is required.
-- After removing an HVX infected plant, a healthy hosta planted in the
same location can be infected up to two years later. (Note that two years
was the duration of this research project.) No one was more surprised by
this finding than Dr. Lockhart. Previously the general recommendation was
to allow 4 to 6 weeks after removing a virused hosta before replanting.
Based on this research another hosta should not be replanted in the same
location.
This research was funded entirely by interested individuals, local and
regional hosta societies, and hosta growers on behalf of the American
Hosta Society. The research findings beg answers to new questions. As a
result, it is intent of the AHS to embark on a second phase of HVX
research. Individuals, local and regional hosta societies, and hosta
growers are requested to consider a generous contribution to this project.
More information (including a printable pamphlet of the research findings)
is available on the AHS web site:
http://www.americanhostasociet...
Josh
In The Country Garden & Gifts
Specializing in Hostas and Water Gardens
http://www.inthecountrygardena...
