Acifluorfen

Acifluorfen is a herbicide that is used to control broadleaf weeds in various crops. It is a member of the diphenyl ether group of herbicides, which also includes fomesafen and lactofen. Acifluorfen is a contact herbicide, meaning it only affects the parts of the plant that it directly touches. It is most effective when applied to young, actively growing weeds.

Mode of Action

Acifluorfen works by inhibiting the enzyme protoporphyrinogen oxidase (PPO), which is involved in the synthesis of chlorophyll. This inhibition leads to the accumulation of protoporphyrin IX, a compound that is toxic to the plant when exposed to light. The resulting oxidative damage causes cell death and eventually leads to the death of the weed.

Use and Application

Acifluorfen is used in a variety of crops, including soybean, peanut, and rice. It is typically applied post-emergence, after the weeds have sprouted. The herbicide is absorbed by the leaves and stems of the plant, but not by the roots. Because it is a contact herbicide, thorough coverage of the weed is necessary for effective control.

Environmental Impact

Like all herbicides, acifluorfen can have an impact on the environment. It is moderately toxic to birds and mammals, and highly toxic to fish and aquatic invertebrates. However, it is not likely to accumulate in the environment due to its relatively short half-life and its tendency to bind to soil particles.

Safety and Health Effects

Exposure to acifluorfen can cause irritation to the skin, eyes, and respiratory tract. Long-term exposure can lead to more serious health effects, such as damage to the liver and kidneys. Appropriate safety measures, such as wearing protective clothing and equipment, should be taken when handling and applying this herbicide.

See Also

• Herbicide
• Weed control
• Pesticide toxicity to bees

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