herbicide

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Related to Contact herbicide: Systemic herbicide

herbicide

 [her´bĭ-sīd]
an agent that is destructive to weeds or causes an alteration in their normal growth.

herbicide

[er′-, her′bisīd]
an agent that is destructive to weeds or causes an alteration in their normal growth.

herb·i·cide

(ĕr'bi-sīd)
Any chemical compound designed to kill plants. Herbicides have been used in military operations for deforestation, but the U.S. military excludes herbicides from being classified as chemical-warfare agents.

herbicide

any chemical that kills plants. Herbicides can be highly selective. For example, 2,4-D only kills DICOTYLEDONS (broad-leaved plants), leaving MONOCOTYLEDONS unharmed.

herbicide

a substance that destroys weeds. A large number of chemical compounds are used as general and selective herbicides. Most of them have very low toxicity because their availability to animals on recently sprayed pasture is an obvious toxic hazard. Most poisoning incidents arise when animals have accidental access to large volumes of the agent, e.g. if there has been a spillage. The well-known herbicide groupings are bipyridyls, chlorinated acids, dinitro compounds, phenoxyacid derivatives, thiocarbamates and triazines.
References in periodicals archive ?
They are capable of controlling perennial plants and may be slower acting but ultimately more effective than contact herbicides (Howard, 1992).
If you have crabgrass in your lawn, now is the time to kill it with contact herbicide or scrape or dig it out with a sharp-edged hoe or shovel.
Bromoxynil, a non-persistent contact herbicide, has proven very effective in controlling broadleaf weeds, including morningglory and cocklebur, with no residues in the treated crop.
A few weeks later, pull and hoe the sprouts or apply a contact herbicide such as glyphosate.