iris borer, what to do with soil

lotodig(z6Mid Tenn)May 20, 2010

I have dug up and disposed of a large clump of older Irises and of course when I did I found signs of Iris Bores.

here's my question, what do I need to do to the SOIL where the irises were planted that would make it safe to replant more Irises? I read here on this forum to pour dishwater on the spot but I don't understand what is in dishwater (beside soap)that may be effective or why not just mix up big buckets of soapy water and use that for treatment?

This fall I intend to use the blowtorch treatment and next spring I will use Merit earlier. I used it this spring but I must have waited too long for it to be effective

Thanks for any information

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lotodig(z6Mid Tenn)

I'll make a post so that this post will drop down.

    Bookmark   May 23, 2010 at 10:22PM
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I would really love an answer to this, as I'm in exactly the same situation. Can anyone out there help?

    Bookmark   May 28, 2010 at 1:26PM
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ken_adrian Adrian MI cold Z5

what does the soil have to do with the bug???

would not you just treat for the bug at the appropriate time of year?


    Bookmark   May 29, 2010 at 5:21PM
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Never heard of treating the soil? But I'm a newbie. My mom always just lifted the plant, squished the borer, dipped the corm in sulfer powder and replanted.
Her Iris are stunning!

    Bookmark   May 31, 2010 at 1:48AM
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