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

I would not recommend using both as there is no information on possible
synergistic effects. The phyto toxic effects (killing of plant being
treated) of each chemical is known only in isolation. Using both alternately
is a possibility. I have designed pesticide facilities for Bayer in my
younger days and currently have a commercial iris nursery.

Harold Peters
Beautiful View Iris Garden
2048 Hickok Road
El Dorado Hills, CA 95762
harold@directcon.net <h*@directcon.net>
www.beautiful-view-iris.com


-----Original Message-----
From: owner-iris@hort.net [o*@hort.net]On Behalf Of Char
Holte
Sent: Wednesday, August 18, 2004 5:00 AM
To: iris@hort.net
Subject: Re: [iris] Merit/Cygon (was CULT: Anne-Lise)


Hi,

My understanding they are both systemic.  Just different chemicals.
Overkill perhaps?

Char
----- Original Message -----
From: "Patrick Orr" <irisdude@msn.com>
To: <iris@hort.net>
Sent: Tuesday, August 17, 2004 9:55 PM
Subject: Re: [iris] Merit/Cygon (was CULT: Anne-Lise)


> why couldn't you use both?
>
>   ----- Original Message -----
>   From: Christopher Darlington<c*@sympatico.ca>
>   To: iris@hort.net<i*@hort.net>
>   Sent: Tuesday, August 17, 2004 6:29 PM
>   Subject: Re: [iris] Merit/Cygon (was CULT: Anne-Lise)
>
>
>   John,
>
>   Thanks you kindly for your response.  Seems to me that Cygon is the
>   route for me to follow, expecially for my first  attempts to deal with
>   these pests.
>
>   I'd also love to see it effective against the smaller borers that eat
>   into the spathes and destroy the flower before it has a chance to open.
>
>   Regards
>   Chris
>   Lafontaine, Quebec, 4b
>
>   John Bruce wrote:
>   >
>   > Chris-
>   >
>   > I will field a reply to this from the heart of borer country.
>   >
>   > Cygon is systemic, absorbed into the plant tissue. It stays there for
> about
>   > two weeks. I assume the plant breaks it down and it needs to be
> reapplied.
>   > Merit is longer lasting, but in my opinion is not as effective as
Cygon.
> We
>   > have
>   > tried Merit (imidacloprid) for two seasons. We have applied as
directed.
> In
>   > the first year is was not as effective, so we doubled the recommended
> dosage
>   > and still had borers. Since Merit is supposed to last for 6 months, we
>   > applied
>   > it well before temps were warm enough to trigger fan growth or borer
egg
>   > hatching. Areas treated with Cygon had far fewer borers than those
> treated
>   > with Merit. I still hear much praise for Merit, and it is safer than
> Cygon,
>   > but the
>   > jury in my court remains in deliberation.
>   >
>   > John Bruce
>   > Hidden Acres Iris Gardens
>   >
>   > ----- Original Message -----
>   > From: "Christopher Darlington"
> <chris.darlington@sympatico.ca<c*@sympatico.ca>>
>   > To: <iris@hort.net<i*@hort.net>>
>   > Sent: Tuesday, August 17, 2004 8:38 PM
>   > Subject: Re: [iris] Merit/Cygon (was CULT: Anne-Lise)
>   >
>   > > Hi Char,
>   > >
>   > > Thanks for the information.  I wonder when Merit will become
available
>   > > up here ?
>   > >
>   > > BTW, does anybody know if Cygon 2E works the way Merit does ?  I
read
>   > > that Merit gets absorbed through the plants root system and makes
the
>   > > plant toxic to eat.  Does Cygon 2E work this way as well or is it
used
>   > > to treat the exterior of the fans and ground only ?  I have found
that
>   > > anything that I spray fans with, it never really appears to stick.
>   > > Should I add soap to the solution ?
>   > >
>   > > Chris
>   > >
>   >
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