Herbicides are chemicals used to kill plants.

learn more… | top users | synonyms

5
votes
2answers
102 views

What are the uptake and decay rates for Spectracide® Weed Stop® for Lawns?

Once a lawn has been treated with Spectracide® Weed Stop® for Lawns how long are the active ingredients 'active'? Do some decay faster then others? Following the links from the Manufactures site ...
2
votes
1answer
57 views

Is Clopyralid or Dicamba more effective in the control of clover in lawns?

September's coming up, time to start getting ready for clover control. I have always used Clopyralid (3,6-dichloro-2-pyridinecarboxylic acid). The brand I use is Lontrel. My question is, how well ...
2
votes
2answers
64 views

Can I use herbicides in flood conditions without harming good plants?

In Arizona, USA, it is monsoon season, meaning that our dry, arid, and rainless state suddenly gets a lot of rain over the period of about two months. This sort of flooding is perfect for spreading ...
6
votes
1answer
134 views

Is it safe to eat dandelions previously treated with a selective iron herbicide?

Three years ago, I started trying to reduce the number of dandelions in my lawn with a household selective herbicide named Scotts® EcoSense® Weed B Gon® (MSDS and retailer product page). The ...
3
votes
2answers
98 views

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 ...
1
vote
2answers
46 views

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 ...
2
votes
3answers
143 views

Why is triclopyr not available in California?

I'm considering using a triclopyr based herbicide to defeat some clover in my lawn (dwarf fescue) in San Francisco, CA. For example, there is this product: ...
3
votes
2answers
62 views

How to eradicate Berberis growing in a Thuja hedge?

I have some Berberis shrubs growing inside a hedge of Thujas. They are very difficult to access. Is there any efficient chemical method of eradicating just those Berberis shrubs?
1
vote
1answer
60 views

Is adding a surfactant causing my herbicide to solidify?

I mixed Triplet SF with some non-ionic surfactant in a ratio of 3:1. The mixture coagulated and formed what looked like you might see gumming up the outlet of a soap pump dispenser. Is there ...
3
votes
2answers
3k views

Glyphosate (Roundup) effectiveness and rain

Yesterday I used around 3 litres of glyphosate (generic roundup) around my garden. It was in the evening around 6pm. This morning I woke to the sound of rain. Will the rain have diluted the ...
5
votes
1answer
578 views

Should I be using pre-emergent or post-emergent herbicide?

The air temperature is in the mid 60s, and already the weeds started to germinate. Is this a good time to spray a pre-emergent herbicide or is it too late? Should I apply a post-emergent herbicide ...
5
votes
1answer
202 views

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 ...
7
votes
2answers
303 views

How do I prepare and sow a lawn organically?

Sowing a lawn organically seems to have 2 problems that need solving: Killing the weeds prior to sowing Avoiding weed growth after sowing Once the soil is levelled, I'm considering trying the ...
6
votes
2answers
493 views

Natural herbicide to kill weeds in a hard landscape environment?

I've got some weeds growing up between the flagstones in our backyard -- is there something natural and okay environmentally that I can use to kill the weeds? Obviously, I don't want anything growing ...
9
votes
1answer
429 views

How to prevent regrowth of elm saplings from concrete foundation?

At the base of our old garage where the concrete foundation meets an asphalt slope down to the alley behind, we've had small elm tree saplings grow as weeds over the past three years. I've never ...
6
votes
1answer
1k views

Will over spray from Ortho Weed-B-Gon Max kill my flowers?

I was spraying some Ortho Weed-B-Gon Max on my lawn, and some of the mist/over-spray got in and around my flower bed (on flowers). Are my flowers doomed, or is there still hope that they will live ...
6
votes
2answers
479 views

What's a good selective herbicide?

I bought a house 2 years ago in San Francisco where the yard had been allowed to do whatever it pleased. Now I have an amazing mix of clover, weeds and grass throughout the entire yard. Is there a ...
31
votes
2answers
1k views

How long before poisons like Round-up become inert?

If I spray some grass with a poison like Round-up or Kills All, how long before that spray is not dangerous to plants? So for example, if after spraying, I walk through the sprayed area and then onto ...