Re: Wee killer question.

Posted by Tim B on September 21, 2003 at 20:38:42 from (216.195.16.171):

In Reply to: Wee killer question. posted by Fence on September 17, 2003 at 08:19:29:

Wow, that was alot of replys! If the stuff looks like poison ivy, I assume you are talking about a broad-leaf woody plant. I think getting rid of it will be alot easier than it sounds. Go by some Roundup concentrate (or generic glyphosate formulated for such plants), mix it according to the directions on the bottle for woody plants, and spray. BUT THE MOST IMPORTANT THING IS WHEN YOU SPRAY, AND THAT TIME IS PROBABLY NOW (depending on what latitude you are at). Spray the weeds just as the leaves are starting to turn from green to what ever color they turn to in the fall, or just before. I am in Massachusetts, the best time to spay is from now until about the first or second week in October.

This time of the year all of the translocation in the plant is from the leaves to the roots - the plant is breaking down the leaves to and absorbing what food it can into the shoot and roots for overwintering. It is much easier for the glyphosate to get to the roots and kill the whole plant. Also the leaves are "breaking down" so the waxy barrier on the upper surface of the leaves is not as healthy and therefore not as good at keeping liqids out. I've sprayed oodles of poison ivy and a fair amount of Phragmites reed this way - it kills 95% or more of the stuff every time.

Plus, glyphosate is essentially harmless to everything else in the environment, and does not travel well once in the soil. Note however that surfacants are very toxic to aquatic organisms - i.e., animals that live in water. Don't use Roundup other formulations intended for used on dry land in wetlands or near waterbodies.

(Sorry for another long post, when I started I thought it would be short.)

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