Re: Leaf spot
- To: Multiple recipients of list <i*@rt66.com>
- Subject: Re: Leaf spot
- From: R* T* D* <r*@sierratel.com>
- Date: Mon, 10 Feb 1997 18:50:48 -0700 (MST)
Bill Shear wrote:
>
> I still have difficulty seeing how fungal leaf spot can be spread by
> aphids. Without confirmation I think I'll stick to the traditional view
> that the spores are airborne and splashed from plant to plant by rain.
>
> Best wishes, Bill
> ___________________
> William A. Shear
> Department of Biology
> Hampden-Sydney College
> Hampden-Sydney VA 23943 USA
> phone (804) 223-6172
> FAX (804) 223-6374
Bill,
I too doubt the aphid theory. the World of Iris states that spores can
be blown by wind, splashed by rain, or carried on clothing to healthy
leaves. Another reason I don't believe this is that I have virtually no
aphids here. The foothills of the Seirra Nevada's in California are a
primary collection area for Lady bug beatles. Companys who sell these
commercially come here in the spring and collect. They are here by the
millions in the spring. However, like I mentioned in a previous
message, I can get leafspot throughout the winter. I alternately spray
two fungicides twice a month.
Rick Tasco
Central California
Zone 8
