#2: Re: Brown / black spots on Rudebeckia
Posted on 2006-06-14 02:56:10 by JoeSpareBedroom
"R. Kannan" <rkannan@peoplepcnospam.com> wrote in message
news:BHHjg.44311$fb2.20907@newssvr27.news.prodigy.net...
> Hi,
>
> Every year I get black spots on the leaves of Rudebeckia plants. Some of
> the
> leaves are turning yellow. I am presuming that these are effects of
> insects/fungi and I have been spraying them with 'Ortho Insect and disease
> control - Formula III'. I am not too sure if it is very effective. The
> plants seem to thrive and flower every year though the leaves turn yellow
> and eventually dark brown. Is there something else that can be done? I
> ggogle and found someone else had the samne problem
>
> http://www.icangarden.ca/forum.cfm?task=viewthread&chatt hreadid=6470
>
> but did not see any solutions posted.
>
> TIA for any advice
It's just something that happens to Rudbeckia. Worse in some years than
others. It only upsets people, but doesn't kill the plant. Stop spraying
chemicals on them without having any idea what the cause is. Those chemicals
have never been, and never will be proven to be safe.
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