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The roundup I use is a vegetative killer and will kill
irises and it will distort the blooms if you get too close to the irises. Cygon
2E is the systemic insecticide I use at the rate of a tablespoon per gallon. Be
careful with it because it is a nerve poison and if you get too much on you it's
like a bad case of the flu. Atropine is the antidote, just like for nerve gases
used in wartime.
Jim Ennenga
----- Original Message -----
Sent: Friday, February 18, 2005 6:35
PM
Subject: [iris-photos] Re: CULT: borers
and winter foliage
Roundup is a systemic insecticide. It is absorbed by
the leaves and
then poisons what eats the leaves. It has no effect on eggs
and it
would not have its effect until after the boarers have hatched
and
started feeding. Dormant oil spray, such as used in fruit trees,
would
be a good early spray to use and apparently it can be quite
effective
with boarer. It works by covering the eggs with a thin film of
oil.
this stops the egg from getting fresh air and the egg smothers. It
is
one of the oldest method of killing garden pests and still
used
extensively. And relatively safe for everything else.
Chuck
Chapman
--- In iris-photos@yahoogroups.com, Linda Mann
<lmann@v...> wrote:
> Thanks Jim.
>
> Have you burned
yet? Do you burn more than once?
>
> I was planning on
burning after Roundup, but at the rate the wet weather
> & breezes
are going, may have to burn first.
>
> <The eggs are laid on
green folliage which usually dies back during the
>
winter.
>
They may then be on the soil. That is why torching
> and scorching the
surface of
the
>
ground is a good idea. ... Jim Ennenga>
>
> --
> Linda
Mann east Tennessee USA zone 7/8
> East Tennessee Iris Society <http://www.korrnet.org/etis>
>
American Iris Society web site <http://www.irises.org>
> talk
archives: <http://www.hort.net/lists/iris-talk/>
>
photos archives: <http://www.hort.net/lists/iris-photos/>
>
online R&I <http://www.irisregister.com>
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