herbicide

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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 ?
But many of them have already been ruled out: The task force says the use of herbicides containing known or suspected carcinogens, endocrine disruptors, toxins affecting reproductive or nervous systems or substances harmful to any type of terrestrial or aquatic species should still be banned.
These enhance the efficiency of herbicides by creating easiness in application, higher persistent period on weeds leaves, easiness in penetration in weeds and reducing loss of herbicides from leaching, volatilization and chemical ineffective bonding.
Initially, it was determined the sorption coefficient of the herbicides in the bagasse (dry pulp that remains after juice extraction) for the development of the model that describes the mass balance of the herbicide in the soil-plant in sugarcane.
When crop plants were sprayed with different concentrations of post-emergence herbicides seed number produced in wheat spikes was 24.
Within types of herbicides, bio-herbicide would grow at the fastest rate reflecting 27.
Due to the extensive use of preplant and in-season tillage in some agronomic crops in California, along with the use of pre- and postemergence herbicides, herbicide resistance is not as widespread as it is in other parts of the country where no-till and minimum-till systems have been widely adopted.
Thet est was held in south Napa Valley near Carneros and focused on pre-emergent herbicides, though each application included Roundup systemic herbicide in case any weeds had germinated unseen, plus AMSPro surfactant to improve penetration.
Herbicides are used mainly for food crops and insecticides and fungicide are also used for food crops including second crop and horticulture.
General advantages of herbicide tolerance crops include broader spectrum of weeds controlled, reduced crop injury, less herbicide carry-over, price reduction for "conventional herbicides", use of herbicides that are more environmentally friendly, new mode of action for resistance management and weed management flexibility.
Environmental activists have warned the European Commission against authorising the cultivation of new genetically modified (GM) crops in the EU, which could increase herbicide use by up to 15 times.