Butachlor

Butachlor is a herbicide that is widely used in the cultivation of rice to control weeds. It is an organochlorine compound that belongs to the class of chloroacetanilide herbicides. Butachlor is a selective, systemic herbicide, absorbed primarily by the germinating shoots, and secondarily by the roots, with translocation throughout the plant, giving higher concentrations in the vegetative parts than in the reproductive parts.

Chemical Properties

Butachlor is a yellow to brown liquid with a slightly aromatic odor. It is moderately soluble in water and readily soluble in most organic solvents. The chemical formula for butachlor is C17H26ClNO2.

Mode of Action

Butachlor works by inhibiting the plant's ability to synthesize protein, which is necessary for plant growth and survival. It is most effective when applied to young, actively growing weeds.

Usage

Butachlor is primarily used in the cultivation of rice, but it can also be used on wheat, barley, and other cereal crops. It is typically applied pre-emergence, which means it is sprayed on the soil before the rice plants have emerged.

Health Effects

Exposure to butachlor can cause a variety of health effects in humans. These can include skin and eye irritation, nausea, vomiting, and in severe cases, damage to the liver and kidneys. It is classified as a Category C pesticide, which means it is possibly carcinogenic to humans.

Environmental Impact

Butachlor is toxic to aquatic organisms and can cause long-term adverse effects in the aquatic environment. It is also harmful to soil organisms and can affect soil fertility and crop yield.

Regulation

In many countries, the use of butachlor is regulated due to its potential impact on human health and the environment. In the European Union, for example, butachlor is not approved for use as a pesticide.

See Also

• Herbicide
• Rice cultivation
• Organochlorine compound
• Chloroacetanilide

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