"Stephen Henning" wrote in message
news
"RichToyBox" wrote:

The following site says that roundup can be used to control the poison
ivy.
http://www.conservation.state.mo.us/...e/flora/poivy/

Roundup does work on poison ivy. I have been using it for many years.
You need to use a strong mixture and add a spreader/sticker and may need
to reapply. Roundup works best on mature plants that are sending sap to
the roots, since it works by killing the roots. On very tall vines of
poison ivy, cut the ivy off about chest high and spray the lower part.
Poison ivy spreads by the rhizomatous roots and the seeds which birds
spread in their guano.

## And that's how we believe it keeps showing up on our property. :-( We
used RoundUp at 6 oz. per gallon and had about a 50% killrate for poison ivy
in the past. I held cardboard behind it to avoid it going into the ponds
and sprayed what's tangled in the net and net's support 3 weeks ago. It
turned yellow and kept right on growing. Is it possible plants can develop
immunity to weed killers like bacteria develop immunity to antibiotics?

The botanist for the National Botanical Gardens in Washington DC said at
a
meeting several years ago, that Roundup can be used to control weeds in
natural ponds without affecting the fish and other animals. It is
apparently neutralized on contact with water.

It is not neutralized on contact with water since it is an aqueous
solution. It is neutralized with water which contains clay particles.
It is the clay that neutralizes it. It is best to apply with a brush or
a cotton glove over a plastic glove so there is not over-spray that gets
into the pond or hits plants you don't want to kill.

## This way sounds much safer around our fish... thanks! :-)

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"Koi-minator" invalid@invalid wrote:

Roundup does work on poison ivy. I have been using it for many years.
You need to use a strong mixture and add a spreader/sticker and may need
to reapply. Roundup works best on mature plants that are sending sap to
the roots, since it works by killing the roots. On very tall vines of
poison ivy, cut the ivy off about chest high and spray the lower part.
Poison ivy spreads by the rhizomatous roots and the seeds which birds
spread in their guano.

## And that's how we believe it keeps showing up on our property. :-( We
used RoundUp at 6 oz. per gallon and had about a 50% killrate for poison ivy
in the past.

I use Roundup at a rate of 4 oz per gallon and get 99% kill rate. I am
spraying new seedlings that have small roots. If you are spraying a
field with established rhizomes, then you will need to keep at it since
the rhizomes can extend many feet under ground. Unless you spray every
green leaf that comes out of the rhizome (which may extend over acres),
you won't effect a kill. If you cut a trench round the kill area about
a food deep, it will sever the rhizome around your kill area so you can
get a complete kill. If you plow a field of rhizomes, every piece will
form a new plant.

In large areas, mowing repeatedly may drain the rhizomes enough so that
spraying will be more effective or not even necessary.
--
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Cheers, Steve Henning in Reading, PA USA Zone 6

Stephen Henning wrote:

If you are spraying a
field with established rhizomes, then you will need to keep at it since
the rhizomes can extend many feet under ground.

I should have said many feet laterally under ground. They never go very
deep. When I plant Christmas trees, I pull out long poison ivy
rhizomes. They are usually never more than 3 or 4 inches below the
surface. I am allergic to poison ivy so I wear gloves, long sleeves and
wrist guards. When I come in I put my clothes in the wash and
immediately take a good shower with a strong soap. I seldom get much of
any rash.
--
Pardon my spam deterrent; send email to
18,000 gallon (17'x 47'x 2-4') lily pond garden in Zone 6
Cheers, Steve Henning in Reading, PA USA

"Stephen Henning" wrote in message
news
"Koi-minator" invalid@invalid wrote:

Roundup does work on poison ivy. I have been using it for many years.
You need to use a strong mixture and add a spreader/sticker and may
need
to reapply. Roundup works best on mature plants that are sending sap
to
the roots, since it works by killing the roots. On very tall vines of
poison ivy, cut the ivy off about chest high and spray the lower part.
Poison ivy spreads by the rhizomatous roots and the seeds which birds
spread in their guano.

## And that's how we believe it keeps showing up on our property.
:-( We
used RoundUp at 6 oz. per gallon and had about a 50% killrate for poison
ivy
in the past.

I use Roundup at a rate of 4 oz per gallon and get 99% kill rate. I am
spraying new seedlings that have small roots. If you are spraying a
field with established rhizomes, then you will need to keep at it since
the rhizomes can extend many feet under ground. Unless you spray every
green leaf that comes out of the rhizome (which may extend over acres),
you won't effect a kill. If you cut a trench round the kill area about
a food deep, it will sever the rhizome around your kill area so you can
get a complete kill. If you plow a field of rhizomes, every piece will
form a new plant.

$$ Thanks Stephen. No acres of the ivy. It's just a few large plants that
came up around the ponds rock necklace. I sprayed them again today (last of
the Round-Up) and made sure to cover all the leaves that I could see.
They're still a bit yellow from the last spraying. I'm so deadly allergic
to them I find it difficult to get to all the leaves since they are tangled
with the net in places, the English ivy, daylillies, hostas and the other
plants around the pond's berm. I will get the rash right through a long
sleeve shirt and sometimes jeans. :-(

In large areas, mowing repeatedly may drain the rhizomes enough so that
spraying will be more effective or not even necessary.

$$ When we redo the collapsing berm/sides my husband will grub it out by the
roots if possible, and we'll spray, spray, spray since the fish will be in a
1,500 gallon holding pool behind the house - far from the spray. I also
plan to use that landscape cloth to help hold down unwanted plants including
the poison ivy. I should never have taken the advice to make the sides
almost straight as now we have a problem with them collapsing or bellying
in.

--
McKoi.... the frugal ponder...
EVERYONE: "Please check people's headers for forgeries
before flushing." NAMES ARE BEING FORGED.
Do not feed the trolls.
~~~ }((((o ~~~ }{{{{o ~~~ }(((((o