Re: Merit/Cygon (was CULT: Anne-Lise)

Hi,

Cygon as I understand it is still on the market, but not Cygon 2E.

Char, New Berlin, WI
----- Original Message ----- 
From: <DFerguson@cabq.gov>
To: <iris@hort.net>
Sent: Monday, August 23, 2004 1:37 PM
Subject: Re: [iris] Merit/Cygon (was CULT: Anne-Lise)


> I'm a little late on this vein, but I thought I'd add the following
> observation.  It may or may not be relevant.  I have never had Iris borer
> except in a few imported plants; however, I do have serious problems with
> Yucca borers.  There are some differences though.  The Yucca borer is a
> large weevil larva, which is a beetle.  The Iris borer is a moth larva.
> Lepidoptera (moths) and Coleoptera (beetles) do not always respond the
same
> way to the same chemicals.  However, I have found that Merit is totally
> useless against Yucca borers, and Cygon is in fact the only chemical which
> I have had luck controlling them with so far.  The only other way to get
> rid of them is to dig them out of the plants (which usually kills the
> plants).  My understanding is that Cygon is not manufactured any more?  At
> least I can't seem to get it.  Too bad, another good chemical bites the
> dust.  It works best for Pine Tip Moth too, and that is a boring moth
> larva.  Merit works marginally on Pine tip moth, but usually needs
> reapplied several times to get decent results.  Cygon cleans them out the
> first time through.
>
>
> Dave
>
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