Re: CULT: Iris Borer Control

Merit is not just a contact spray.  It is a sytemic insecticide as is Cyfluthrin in another Bayer Advanced Lawn Treatment line.  However it has the same precautions for bees and waterlife.

Paul Archer
Raleigh, NC Zone 8

-----Original Message-----
>From: DWiris@aol.com
>Sent: Mar 16, 2008 10:11 PM
>To: iris@hort.net
>Subject: Re: [iris] CULT: Iris Borer Control
>
>Contact sprays only kill borers for the few hours they may be on the  outside 
>of the iris leaves. Since they hatch at various times, it is almost  
>impossible to kill borers that way.
> 
>Controlled burning is normally done in the fall. Spring burning could  damage 
>new shoots coming up. We don't use burning because it would destroy our  
>plastic labels. Cleaning up all dried leaves, weeds and other debris in the fall  
>will cut down on the amount of borer eggs left to hatch in the spring.
> 
>Dorothy Willott in Northeast Ohio
> 
>
>
>
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