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

4 votes

Will glyphosate directly harm Monarchs or other butterflies?

Glyphosate is a herbicide used in agriculture and non-crop situations for the control of a wide range of weeds. ... …
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2 votes

Is it safe to use herbicide without clear withholding period?

When I was in pesticide...school, grins, there was an instructor who laughingly said you could drink this stuff. ha ha. The chemistry of glyphosate changes the second it is sprayed on another surf …
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2 votes

Weed control 1 year before installing turf

I am constantly amazed that in all my decades of gardening, weeds have never ever been a problem..they are there, I know how to manage them effortlessly and I also know that a healthy bed of soil that …
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1 vote

How can I remove crabgrass from a Zoysia lawn, and flower beds?

I am glad you asked us rather than listen to True Green and Home Depot. My goodness! Please PLEASE forget that plastic membrane!! Please. It is one of the dumbest things us humans have done...I've …
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1 vote

What is this weed and how do I kill it without killing the grass?

Should have you look at this site I am posting on Henbit to see if you think this is the same plant; look for opposite leaves, two leaves coming from the same joint on the stem... How much of your la …
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1 vote

How do I remove one of two different plants growing in the same spot?

I would just take a pruning saw and chop the newcomer to the ground. If it starts to regrow just chop the new growth down. It will die from starvation and you won't have to worry about surgery! You …
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1 vote

What is proper way of disposing weed treated with herbicides?

Long half life, horribly leach-ate, very bad pre emergence herbicide. …
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1 vote

Is there a selective herbicide for crabgrass that can be applied during high temps?

Preemergence herbicide is gnarly. You shouldn't have to use it for regular maintenance. Cool season lawns are far far easier to maintain with no use of pesticides ever. …
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0 votes

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

Your water table down there is in big trouble and a little herbicide is a big deal for water quality. Weeds are nothing more than a plant out of place. …
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-2 votes

Elimination of Japanese Knotweed by injection

All photosynthetic plants need light to make their food. If light or photosynthesis is denied, either by continually cutting off new growth or burying very deeply and combining the cutting of any gre …
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-4 votes

Why does Tenacity® (mesotrione) kill bentgrass but not other grasses?

I checked on this herbicide and it's main use is for pre-emergence of grass seeds. Guess it must work but lawns shouldn't get to the point where you are able to see the soil. …
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