Tebuthiuron

Tebuthiuron is a broad-spectrum herbicide primarily used for the control of woody and herbaceous weeds. It is a systemic herbicide, meaning it is absorbed by the plant and transported throughout the plant's system, leading to the death of the entire plant.

Chemical Properties

Tebuthiuron is a white, crystalline solid with a slight amine odor. It is soluble in water and most organic solvents. The chemical formula for tebuthiuron is C9H16N4OS. It belongs to the chemical class of urea herbicides.

Mode of Action

Tebuthiuron works by inhibiting photosynthesis, the process by which plants convert sunlight into energy. It does this by blocking the electron transport chain in photosystem II, preventing the plant from producing ATP, the energy currency of the cell. This leads to the death of the plant.

Uses

Tebuthiuron is used in a variety of settings, including rangeland, non-crop areas, industrial sites, and rights-of-way. It is particularly effective against woody plants and brush, and is often used for the control of invasive species.

Environmental Impact

Tebuthiuron is highly persistent in the environment and can remain active in the soil for several years. It has a high potential for leaching and can contaminate groundwater. It is also toxic to non-target plants and can cause damage to nearby vegetation if not applied correctly.

Health Effects

Exposure to tebuthiuron can cause irritation to the eyes, skin, and respiratory tract. Long-term exposure can lead to more serious health effects, including damage to the liver and kidneys.

Regulation

In the United States, tebuthiuron 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
• Urea
• Photosynthesis
• Environmental Protection Agency

References

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