Fluroxypyr is a selective, systemic herbicide that effectively controls broadleaf weeds in cereals, pastures, and non-crop areas. This herbicide belongs to the pyridine carboxylic acid family and mimics natural plant hormones, specifically auxins, disrupting the growth process of target weeds and ultimately causing their death.

Key Characteristics:

Mode of Action:
Fluroxypyr acts as a synthetic auxin, inducing abnormal growth in broadleaf weeds. The plant absorbs it through the leaves, allowing it to move throughout the plant and interfere with growth-regulating processes, which leads to weed death.

Target Weeds:
This herbicide effectively targets a variety of broadleaf weeds, including cleavers (Galium aparine), chickweed (Stellaria media), and ragwort (Senecio jacobaea). It does not control grass weeds.

Selectivity:
Fluroxypyr specifically targets broadleaf weeds while leaving grass crops unharmed, making it ideal for use in cereal crops like wheat and barley, as well as pastures.

Common Crops:
Farmers mainly use Fluroxypyr in cereals, pastures, rangeland, and some non-crop areas. Its selectivity ensures safety for crops such as wheat, barley, corn, and certain grass pastures.

Common Formulations:

Emulsifiable Concentrate (EC)

This is one of the most common formulations of Fluroxypyr, typically containing concentrations ranging from 20% to 45%. It is diluted with water and applied as a foliar spray.

Soluble Liquid (SL)

Sometimes available as an SL formulation for ease of mixing and application, providing effective weed control when sprayed on the foliage.

Granules (GR)

Less commonly, Fluroxypyr can be formulated as granules, used in specific situations like soil applications or pre-emergence treatments in non-crop areas.

Tank Mix or Premix Products

Fluroxypyr is often mixed with other herbicides such as MCPA, 2,4-D, or Glyphosate to extend its weed control spectrum, particularly in cereal crops or pastureland. This allows for broader control of both broadleaf and some tough or resistant weeds.
Usage Considerations:
Resistance Management: As with many synthetic auxin herbicides, there is the potential for weed resistance if used continuously. It is often rotated with herbicides that have different modes of action to manage resistance.
Environmental Safety: Fluroxypyr has a relatively low environmental impact, though care should be taken when applying near sensitive areas such as waterways.

Application:

Fluroxypyr is typically applied post-emergence, when weeds have emerged but are still actively growing. It can be used as a stand-alone herbicide or in combination with other products to improve efficacy against a wider range of weed species.

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