Re: Leaf spot/insect control
In a message dated 97-02-10 12:53:24 EST, you write:
>We feel that the leaf spot is spread by insects. The japanese beetles
>spread it on roses and the aphids seem to spread it on the irises. Even
>garden tools can spread it. We have found that by keeping down the aphid
>populations we have far fewer leaf spot problems. Also, June bugs spread
>soft rot. Don has examined their mouths under the microscope and they had
>Erwinia carotovora (soft rot) in them. Possibly they inject it into other
>plants then after the soft rot breaks down the rhizome they eat them.
A local grower who regularly buys new intros from Schreiners is a great
believer in SEVIN for her iris. I have never seen any sign of leaf spot or
rot in her garden. She fertilizes, douses with SEVIN regularly, and
cultivates constantly, but does not use a fungicide. The insect control
seems to really work for her.
Linda Mann east Tennessee USA