I've been using Roundup as part of my technique for getting rid of the
French broom that's threatening to take over my hillside. I paint it
on the lower stem and often abrade the lower stem to assure
absorption. I then wait about a week for the glyphosate to do its
dirty work on the root system, then pull the whole thing up with a
weed wrench. (I'm also careful to remove any seed pods from the broom
and dispose of it plastic bags.)
My question is about the concentration to use. I used the recommended
dilution in the directions, which gave me a concentration of less than
1% glyphosate. Using that, I didn't really see much dieback in the
broom plants after a week. I notice that Roundup that's sold for
direct application has a concentration closer to 2%. Is that the
concentration I should use? Perhaps stronger?
Let me know,
In article <13378f69.0308180048.2b5e7eb3
:) dilution in the directions, which gave me a concentration of less than
:) 1% glyphosate. Using that, I didn't really see much dieback in the
:) broom plants after a week. I notice that Roundup that's sold for
:) direct application has a concentration closer to 2%. Is that the
:) concentration I should use? Perhaps stronger?
Unless the label of the concentrate allows a mixture
higher than what you are mixing, you shouldn't make it
higher. Your concentrate and the pre mixed you saw on
the shelves probably have a bit different formulation
make up, giving the different percentage rates for the
finished product even though the end results will be
expected to be the same.
My Round Up instruction booklet says for general use against shrubs using a
hand held sprayer, use a 2% solution. Same against perennials. 1% against
There are specific percentages against specific species, but broom isn't
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