Fluroxypyr

A detailed overview of the herbicide Fluroxypyr

Overview

Chemical structure of Fluroxypyr

Fluroxypyr is a selective systemic herbicide used primarily for the control of broadleaf weeds in various crops. It belongs to the class of chemicals known as pyridine carboxylic acids. Fluroxypyr is commonly used in agriculture to protect crops such as cereals, maize, and grassland from weed competition.

Chemical Properties

Fluroxypyr is chemically known as 4-amino-3,5-dichloro-6-fluoro-2-pyridyloxyacetic acid. It is often used in the form of its methyl ester, fluroxypyr-methyl, which enhances its ability to penetrate plant tissues. The chemical structure of fluroxypyr allows it to mimic natural plant hormones, disrupting normal growth processes in susceptible plants.

Mode of Action

Fluroxypyr acts as an auxin mimic, interfering with the growth processes of broadleaf weeds. It is absorbed by the leaves and translocated throughout the plant, where it accumulates in the growing points. This leads to uncontrolled growth, ultimately causing the death of the plant. The herbicide is particularly effective against weeds such as cleavers, thistles, and dandelions.

Applications

Fluroxypyr is applied post-emergence, meaning it is used after the weeds have emerged from the soil. It is often combined with other herbicides to broaden the spectrum of weed control. The herbicide is available in various formulations, including emulsifiable concentrates and water-dispersible granules, allowing for flexibility in application methods.

Environmental Impact

Fluroxypyr is considered to have a low environmental impact when used according to label instructions. It has a relatively short half-life in soil and water, reducing the risk of long-term environmental persistence. However, as with all herbicides, care must be taken to avoid contamination of non-target areas and water bodies.

Safety and Handling

When handling fluroxypyr, it is important to follow safety guidelines to minimize exposure. Protective clothing, gloves, and eye protection should be worn during application. Users should also be aware of the potential for skin and eye irritation and take appropriate precautions.

Related pages

• Herbicide
• Auxin
• Weed control
• Pyridine