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CULT: Bt and Iris Borers

  • Subject: CULT: Bt and Iris Borers
  • From: judyhunt1@aol.com
  • Date: Wed, 8 Aug 2001 19:43:17 EDT

A nursery owner who knows we grow irises showed me a post card he had 
received with the same ad that appears in the AIS Journal for the borer 
spray.  I told him that from what I hear, it is probably not effective.  He 
asked me about Bt - bacillus thuringensis (not sure of the spelling) for iris 
borers.  I have never heard of its being used for this pest.  I checked the 
archives and found nothing there.  Has anyone ever used Bt for this?  I am 
sure that if it worked it would be common knowledge among irisarians, but I 
told him I would ask the experts.

Judy Hunt in Louisville, KY, Zone 6, who is glad to get the latest report on 
Larry Harder.  Thanks, Mary.

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