I can't tell you the science behind it, but do know that that is how it
works. You are not permitted to reapply because it has such a long residual.
When I used to spray Dursban and Diazinon and had spraymix left over the
next day I would just count it as water. The 1/2 life on that stuff is very
short, depending upon water ph, sunlight exposure etc. Merit is different.
It hangs in there.

Peter H




"Peter" wrote in message
...

Fasinating. How does it prevent the new grubs from feeding? Why is it
prohibited to reapply Merit twice in one year? What is the harm in it?

Thanks

Peter


Merit has a very long residual. It hangs around for about 3 months. This
is
why they don't permit a second application in a season here. You may as
well
just double the application rate initially 'cause the first application
is
still there.

Merit works to prevent the new, young grubs from feeding. They ingest it
in
very small quantities and then can't feed again which causes them to
starve
to death. I have found it to be virtually 100% effective even when the
application is not perfect. Unfortunately the adult grubs are just too
big
and strong to be effected. Fortunately they will pupate into June Bugs
and
fly off and bother someone else in the next spring, or following one.
Merit
should eliminate your grub problem, but you have to be patient.

You are right when you say now is the right time to apply it.

Peter H



"Peter" wrote in message
...
Thanks Peter -

But why won't it do anything for existing grubs? I read that it kills
grubs. Also, the new infestation is under way, the beetle population
peaked
last week and the eggs shouls start hatching grubs any day now. What
I
understand, now is the best time to apply Merit.

I also understand Merit is not harmful to people and pets, so
overapplication doesn't have any *real* adverse effects.

Thanks

Peter

"Peter H" wrote in message
.cable.rogers.com...

"Steveo" wrote in message
...
No, it won't hurt anything but your wallet.

"Peter" wrote:
Thanks for you reply Steveo.

Will it hurt my lawn to reapply? I *really* need to wack the
grubs
bad.
They got me the last two years before I realized what was going
on.
I
want the mothers dead.

Peter

"
Peter wrote:
I spread a 14 pound bag of Bayer Merit granulated on my
yard
last
night, and watered the lawn afterward with between 0.25
and
0.5
inches of water to wash it in. I'm attempting to kill
Japanese
beetle
grubs -
have had a bad problem for the last tow years. I applied
the
Merit
at
a
heavier rate than recommended. The recommended rate is
2.8
lbs/1000,
I
used 3.8 lbs/1000. My soil is clay and perculates a
little
slow.

Tonight we had a heavy thunderstorm and heavy rain. We
got
about
1
inch of rain in about 15 minutes.

My question is; did all of my Merit wash away? Should I
reapply?

Thanks

Peter


It doesn't matter. The grubs have become Japanese beetles
and
are
flying around now. Reapply before July 4 next year.

Heh, what do you think those beetles are doing when they're
not
feeding?... That's right, laying eggs for the next generation.

The Merit will protect Peter's lawn from grub damage this fall
and consequently next spring too.

I really doubt it has washed away, Peter. It clings to organic
material real well.

Here in Ontario you are not permitted to reapply. Merit has a very
long
residual... and you have already admitted to applying above the
recommended
application rate. You should leave it alone.

Keep in mind that the application will not do anything about the
existing
grubs in your lawn. Merit will only prevent a new infestation. I
have
applied it many times and have seen it watered in, not watered in
and
drenched. It has still been effective in preventing a new
infestation
every
time.

Peter H