The word you are looking for is herbicide.
herbicide
Roundup
Pesticide?
Herbicides.
acid
I do. I actually don't like to take pain killers without smoking weed.
no.
Yes
roundup
* Reduce the use of Weed killers ,if it is too compulsary use only weed killers which do not harm the land
dioxin
Dioxin
The control of plant growth is a reason why auxins are in weed killers. The hormone in question makes plants grow at the appropriate rate within the proper timespan. Weed killers try to alter, slow down or speed up growth to the detriment of the undesirable, unfamiliar vegetation in question.
Herbicide
all weed killers are is salt and water making it safe to drink.
In the US, "weed killers" is a colloquialism for a class of pesticides called herbicides. Glyphosate (Roundup is one brand) and glufosinate (Liberty is one brand) are a couple of common examples.
Organic foods are produced without manufactured fertilizers. pesticides or weed killers only if they are considered natural.