Metribuzin

Metribuzin is a herbicide that is commonly used in the agriculture industry to control broadleaf weeds and grasses. It is a systemic herbicide, meaning it is absorbed by the plant and transported throughout its system, ultimately killing the plant. Metribuzin is a member of the triazinone family of herbicides, which also includes atrazine and simazine.

Chemical Properties

Metribuzin is a white, crystalline solid with a slight sulfur odor. It is soluble in water and most organic solvents. The chemical formula for metribuzin is C8H14N4OS. It has a molecular weight of 214.29 g/mol.

Mode of Action

Metribuzin works by inhibiting photosynthesis in target plants. It specifically inhibits the photosystem II pathway, which is responsible for converting light energy into chemical energy. This disruption of photosynthesis leads to the death of the plant.

Usage

Metribuzin is used on a variety of crops, including soybeans, wheat, and potatoes. It is typically applied pre-emergence or early post-emergence. The exact timing and rate of application can vary depending on the specific crop and weed species present.

Health Effects

Exposure to metribuzin can cause a variety of health effects. Acute exposure can cause skin and eye irritation, nausea, vomiting, and diarrhea. Chronic exposure can lead to more serious health effects, including damage to the liver and kidneys.

Environmental Impact

Metribuzin is moderately persistent in the environment and can leach into groundwater. It is toxic to aquatic organisms and non-target plants. However, it is not considered to be a significant risk to birds or mammals.

Regulation

In the United States, metribuzin is regulated by the Environmental Protection Agency (EPA). It is classified as a Restricted Use Pesticide (RUP), meaning it can only be used by certified applicators.

See Also

• Herbicide
• Agriculture
• Environmental Impact of Pesticides
• Pesticide Regulation