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Questions tagged [herbicide]

Herbicides are chemicals used to kill plants. Use this tag with questions about how to choose and use herbicides on different plants.

A chemical used to kill plants. These can vary from "kill everything" types through to selective types (e.g. broadleaf lawn weedkillers).

Herbicides are usually applied with water soluble sprays, but they can also be granular salts (eg. lawn "weed & feed" mixes; and copper sulphate) or solid (native copper can be an effective tree-killer).

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How long for glyphosate to penetrate plant

How long between spraying Glyphosate and the Glyphosate "getting in place" to kill the plant. My issue is this - I want to make productive use of an area overrun by very well established weeds - and only have 3 days in which to prepare the area and…
davidgo
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Is it safe to use herbicide without clear withholding period?

This year I would like to get rid of weed around wire fence and I'm considering using herbicide. As much as I can see all non-selective (glyphosate) herbicides available at local stores have no information about withholding period (after what…
False Identity
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Should I use Roundup in irrigation ditches?

If I use Roundup to keep weeds and grass out of the irrigation ditches that bring water to my vegetable garden, will it end up washing downstream and killing my vegetables? Also, will it harm my vegetables if I use Roundup on weeds growing in the…
jdickson
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Will glyphosate based herbicide work with a food thickener?

I would like to thicken some Roundup to form a drip-free paint for targeting weeds in groundcover beds. If I use Thick-It starch based food thickener, will I get the result I want? I would be watering down the Roundup 4-5 times normal, because of…
J. Musser
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Will the yellow stain from prodiamine come off of white landscape stone?

I hired landscapers to do a ton of work at my house and one part was to fill a very large area with white landscape stone. Contract stated they would put paper under it then the stone. They did not put the paper down and with one storm weeds came up…
Susan Beth RB
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Targeted Glyphosate use on hardy nettles

We're about to begin our vegetable garden, and we have had some trouble in the past with a nettle that is particularly nasty. Our plan is to apply glyphosate based herbicide directly to the freshly gut green stalk of this nettle to attempt to kill…
David Wilkins
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Using Roundup to Kill Weeds

I sprayed Roundup 2-3 days ago on some tall, tough weeds. If I mow those same weeds down, will the Roundup still kill them?
Carol Myers
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