Re: Merit active ingredient

Hi All,

I think Laurie did over due the treatment of the Merit.

The directions on the bag for 'Advantage White Grub Control' suggest two (2)
Tablespoons per 10 Sq feet.  I use a hand seeder from Scots.  I marked out a
5 x 2 section on my drive and tried the spreader until I got about that
coverage.  I am intent on finding the right amount and used just a tad more
this year as I did have a little Borer damage last year.  Taking into
consideration I was unable to purchase the product until after the three
days of 70 degree weather.  I also made a late application on the Iris beds,
just before the snow flew last fall.

My problem this year is green caterpillars!  Anyone?

Char, New Berlin, WI
----- Original Message ----- 
From: "laurief" <laurief@paulbunyan.net>
To: <iris@hort.net>
Sent: Wednesday, May 26, 2004 10:30 AM
Subject: Re: [iris] Merit active ingredient


> >Laurie in her post gave the name of the Bayer product present in Merit.
I
> >can't quote it exactly, but it is on the order of "imidipropan" or
something
> >close to that..
>
> Close, Neil.  It's imidacloprid, the same active ingredient found in
> Advantage pet flea control products
>
> The granular product is named something like "Bayer Advanced Lawn White
> Grub Control" and should contain only imidacloprid as the active
> ingredient.  I believe there may be formulas with Merit mixed with
> fertilizers, but I would recommend using a product containing Merit alone.
>
> >It is long lasting.
>
> The Bayer rep with whom I spoke a couple years ago said one application
> would last all season.
> >
> >In the future I plan to use the Bayer product and also
> >could use some application rate information which, as I recall, is in
Laurie
> >F's post.
>
> The Bayer rep was *very* reluctant to speak to me about Merit at all,
> since it is not labeled for use with irises.  After I assured him I would
> NOT sue either him or Bayer for any damage to my irises potentially
> caused by Merit, he finally did "guesstimate" an application rate of 1
> tsp/clump.  That's what I used last year to wonderful effect.
>
> This year, however, I *may* be seeing some Merit damage that I did NOT
> see last year.  I dug and divided just about all my irises last summer,
> so the mature clumps I treated with Merit last spring are now mostly
> individual rzs this spring.  Four-six weeks ago, I sprinkled 1 tsp of
> Merit around each of last summer's transplanted divisions, but I'm afraid
> that may have been too much - esp for the MDBs and SDBs.  Some of the
> divisions have now dried up and disappeared.  It may not have had
> anything at all to do with the Merit, though.  Until this last week, our
> spring has been absolutely bone dry.  It's certainly possible the drought
> conditions killed off some of the littleuns that didn't have a chance to
> develop much of a root system after division last summer.  I haven't seen
> the same sort of problems occurring with the larger medians and TBs, all
> of which were also divided and replanted as single rzs last summer and
> treated with 1 tsp. each of Merit this spring.
>
> Sometimes it's just not easy to figure out what's causing what in a
> garden.
>
> Laurie
>
>
> -----------------
> laurief@paulbunyan.net
> http://www.geocities.com/lfandjg/
> http://www.angelfire.com/mn3/shadowood/irisintro.html
> USDA zone 3b, AHS zone 4 - northern MN
> normal annual precipitation 26-27"
> slightly acid clay soil
>
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