Elmo wrote:
On Sun, 25 Apr 2010 11:52:24 -0700 (PDT), ransley wrote:

dont the roundup instructions state to spray leaves,
then it must be left to do its jobs which takes maybe weeks

But what is the mechanism that makes leaves "intake" (absorb, adsorb,
injest, osmosis, etc.) the poison.
Osmosis.

Why would a leaf, which is an excretion organ of the plant for liquids
(transpiration) and gases (outgassing) ... why would that outgassing leaf
INTAKE the poison?

Leaves are excretion organs? Haven't heard of leaves taking in CO2?

Same reason your body would if you get it on your skin.

The water comes up the roots and out the leaves. Why would the leaves
intake the liquid poison?