Re: leaf spots
- To: Multiple recipients of list <i*@rt66.com>
- Subject: Re: leaf spots
- From: a* <a*@gv.net>
- Date: Sun, 29 Mar 1998 17:18:05 -0700 (MST)
Rick Tasco/Roger Duncan wrote:
> Bill Shear wrote:
> >
> > Treatment and Prevention
> > In areas with dry summers, fungal leaf spot comes on with the autumn rains.
> > For the sake of appearances, badly spotted leaves can be removed. Even
> > more so than with other diseases, fungal leaf spot can be prevented by
> > avoiding crowding (the disease spreads from plant to plant) and by cleaning
> > up dead foliage thoroughly in the fall and burning it.
>
> After solarizing all my beds for the past two years I can attest to the
> fact that this process reduces leaf spot to negligibe levels. This year
> I have nearly none in the field. My theory is that solarizing kills the
> spores in the soil. The small amount that has flared up I believe was
> probably present on the plants. Another reason for solarizing your
> beds.
>
> Rick Tasco
> Superstition Iris Gardens
> Central California
> Zone 8
We had Robert Baake (think I spelled his name wrong) talk to our society last
month. He is "Professor Emeritus" and still retains the title of Professor of
Plant Pathology at UC Berkley. I was always under the impression as you that the
spores are in or on the ground. He said no, only on the fans and are air borne.
Interesting. He also contented that if you don't overhead water (including rain)
that you shouldn't have problems with fungal leaf spot. Of course it always rains
and I sure picked up a bad case of it last fall.
Art Bern art@gv.net
Grass Valley, CA
