On May 8, 5:19 pm, Jangchub wrote:
On Thu, 8 May 2008 15:52:16 -0700
wrote:



On May 8, 3:30 pm, Jangchub wrote:
On Thu, 8 May 2008 13:26:35 -0700
wrote:

Recently moved into a new neighborhood in the Berkeley Hills. There
isn't another California coast live oak for at least half a block, so
they must be transported by more than just gravity or wind. A neighbor
walking by saw me pulling a few and commented that sometimes birds
drop them. I think maybe squirrels might be redistributing them. I
found one under my deck (growing between a concrete tile crack), which
doesn't have any reasonable path for an acorn to travel unless it was
moved there. I'm pretty sure they're sprouting from the acorns, as
the few I've pulled usually have the shell of the acorn attached to
the root.

Not sure what to do other than pull them. I tried using 1% Roundup
from a spray bottle, but they seem resistant. I wasn't sure if maybe
the leaves had to be cut to improve absorption. Once I visited a
local botanical garden, and chatted with some of the gardening crew.
They commented that live oak acorns distribute everywhere, and lots of
their time is spent pulling saplings from the garden. I sometimes
hike on trails where the acorns are just everywhere.

We've been having a certain problem in Berkeley with a few planted
live oaks that are planned for removal on University of California
property.

Who told you to dilute glysophate to 1%? DID YOU READ THE LABEL? If
you did, you'd see that in order to work the foliage should be lush as
glyphosate is a systemic herbicide. Stop being lazy and just pull
the things up. How many could you possibly have...?
Whoa - what's with the harsh words? I know what it does. I've used
it in the past to kill poison oak growing in my folks' backyard. In
any case, I've read the label on the concentrated versions that says
that lower concentrations can be used for certain weeds.

In your post you said you didn't know if the "leaves had to be cut to
improve absorpion." That would indicate to me that you didn't know
how to use the product. Not harsh words, just frustrated with people
spraying everything to death to the point where we won't have any
water untainted left. I'm frustrated because people do not follow the
label.

No - I couldn't find anything specifically on the use of herbicides
for oaks. I did a small amount of research on the use of Roundup, and
in it I read some brush the concentrated version directly into split
branches for some resistant plants. I know the most common method is
as a diluted systemic herbicide with primary absorption through leaves
and no activity through roots or bark. I wasn't sure about the live
oaks, whether I sprayed at the wrong time or whether or not the
(rather shiny) leaves would be resistant to absorption.

Mostly I've been using it for the weeds that develop in cracks on my
driveway or concrete/brick. I've known from experience that many
weeds will regrow if the roots aren't killed and part of the root
breaks off.

I didn't have the bottle in my hand and was briefly looking up
information before I posted. I got confused because I saw the listing
for Roundup Poison Ivy & Tough Brush Killer which is 0.1% triclopyr
and 1% glyphosate. I'd rather not use that since I know triclopyr is
more persistent and toxic.

The bottle I used was actually 24oz "Ready to Use", which I understand
is 2% glyphosate. I've been using it on all the weeds that grow in
the cracks as well as assorted stuff that sprouts up everywhere.

I've got dozens of the suckers all over the front and back yards.
I've got a strip along the side where they've sprouted up around ivy.
I even saw one that came out in a group of tightly packed succulents.

Just pull them out. You cannot use glysophate on ivy or succulents.
Glysophate is indiscriminate. It generally kills everything except
nutsedge and possibly one or two other common weeds. If you don't
want to pull them out, get a colinear hoe and just cut them at the
soil level. Voila.

Well - I have been using them on some stray ivy that's been shooting
through. Not sure how they got where they did, as I don't think the
root system is going to transport it 4 yards away. In any case,
spraying 3 leaves isn't likely to kill a larger ivy network, but I
think it might get those leaves. And I did pull out the live oak
sprouting near the ivy and other plants I wanted to keep.