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Re: Rust fungus

> Greetings to all,
> Hope someone can advise me what to do now.I have a heavy infestation of
> fungus Rust on the undersides of my Malva Zebrina,its yellowing and I
> fear the spread to other plantings as well as my vegetable garden.What
> to do now is my question.

Hi Connie,

   First, confirm that it actually is a true rust -- it should have 
   reddist-brown or reddish-orange pustules of spores.  If it's simply
   discoloration of the tissue, then rust may not be present.  If
   the rust is of the cedar-apple rust variety, then the spores should
   have long gelatinous horns.  This latter type has no chemical control.

   That said, the best method of treatment is probobably an application
   of sulfur dust.  Other controls include zineb, macozeb, and ferbam.

Chris
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