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.

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.
References in periodicals archive ?
The Lodi Winegrape Commission's grower outreach and education program encouraged growers to use less of the higher risk pre-emergent herbicides such as Simazine, Diuron, Solicam and Surflan in favor of contact herbicides, particularly formulations of glyhphosate (e.g., RoundUp), which were much lower risk.
Fomesafen and glufosinate are considered contact herbicides with limited translocation.
But since slickspot communities are initially sparse, dominated by annual plants, and appear to maintain an active seed bank (Meyer et al., 2006), some contact herbicides that breakdown quickly in the environment may significantly impact live plants, but may not impact seeds in soils.
New legislation means only contact herbicides can be used - which tackle weeds once they become visible, and the council has teamed up with Nomix Enviro Ltd, who will spread weedkiller in spring, mid and late summer.
They are quick-acting contact herbicides that require contact with foliage and sunlight for activation.
Contact herbicides such as glu-fosinate or paraquat can produce brown necrotic spots on leaves, but generally do not result in vine death if the contact is limited.
Contact herbicides are used on young and lower-vigor vineyard blocks.