DCMU

An herbicide that inhibits photosynthesis

Overview

DCMU (3-(3,4-dichlorophenyl)-1,1-dimethylurea), also known as Diuron, is a chemical compound used primarily as an herbicide. It is a member of the phenylurea class of herbicides and functions by inhibiting photosynthesis in plants. DCMU is particularly effective against a wide range of annual and perennial weeds.

Mechanism of Action

DCMU acts by blocking the photosystem II complex in the photosynthetic electron transport chain. It binds to the D1 protein of the photosystem II complex, preventing the transfer of electrons from plastoquinone to the cytochrome b6f complex. This inhibition disrupts the normal flow of electrons, effectively halting the process of photosynthesis and leading to the death of the plant.

Applications

DCMU is widely used in agriculture to control weeds in crops such as cotton, sugarcane, and fruit orchards. It is also used in non-crop areas such as railways, industrial sites, and roadsides to manage unwanted vegetation. Due to its mode of action, DCMU is particularly useful in areas where selective herbicides are not effective.

Environmental Impact

The use of DCMU can have significant environmental impacts. As a persistent chemical, it can remain in the soil and water for extended periods, potentially affecting non-target organisms. DCMU is known to be toxic to aquatic life, and its runoff into water bodies can lead to the disruption of aquatic ecosystems. Therefore, its application is regulated in many countries to minimize environmental damage.

Safety and Handling

When handling DCMU, it is important to follow safety guidelines to prevent exposure. Protective clothing, gloves, and masks should be worn to avoid skin contact and inhalation. In case of accidental exposure, immediate medical attention is recommended.

Related Pages

• Herbicide
• Photosynthesis
• Photosystem II
• Phenylurea

• 
  DCMU 3D balls