500g Residual Herbicide for Weed Control

This is a professional residual herbicide supplied as a 500g water dispersible granule. Its two active substances, diflufenican and iodosulfuron-methyl-sodium, control very young weeds present at the time of spraying and then provide residual control for up to four months, keeping treated areas weed free for longer. Please note: packaging may vary.

Key Features

• Pre- and early post-emergence control (up to the two leaf stage) of annual and perennial broad-leaved plants and grasses
• Residual effect lasting up to four months
• Controls a broad spectrum of annual and perennial broad-leaved weeds
• Single application per year at 0.5kg/ha
• 500g pack treats 1ha and includes a measuring cup
• Can be tank mixed with glyphosate or a fatty acid where larger weeds are already present
• Brings new chemistry to help manage herbicide resistance; in a trial on a heavily weeded gravel site at an international airport it mixed cleanly with no foaming in the tank
• Suited to keeping larger areas weed free

How to Use

When to use

Can be applied at any time of year, but works best when applied pre- or early post-emergence of weeds (up to the 2 leaf stage). Main application window: February to May, with the remaining months as a secondary window.

Mixing

1. Fill the spray tank with half the required water.
2. Add the required quantity of herbicide.
3. Agitate the tank until the granules are fully dispersed.
4. Top up with water to the required level.

Applications

Approved for professional use on:

• Amenity vegetation (around) – areas of bare soil around ornamental plants, or intended for ornamental planting
• Natural surfaces not intended to bear vegetation – areas of soil or natural rock outcrops not intended to bear vegetation
• Permeable surfaces overlying soil – any man-made permeable surface (excluding railway ballast) that overlies soil and is not intended to bear vegetation
• Hard surfaces (railway ballast only) – any man-made impermeable surface not intended to bear vegetation

Target Species

A selection of the species controlled is shown below (refer to the product label for the full list). It will not control established deep-rooted perennials such as dandelion, thistle or nettles.

Specifications

About the Active Substances

Diflufenican

• Mode of action: a pigment synthesis inhibitor. It disrupts pigment production so chlorophyll is left unprotected from sunlight, causing the cell contents to break down rapidly.
• Mobility: a residual herbicide with xylem-mobile activity; it is taken up through the leaves and roots of susceptible plants and moves upwards in the xylem (water conducting tissues).
• Timing: apply pre- or early post-emergence; post-emergence treatments are most effective on small target plants.

Iodosulfuron-methyl-sodium

• Mode of action: an ALS (Acetolactate Synthase) inhibitor. ALS is a key enzyme in the biosynthesis of branched-chain amino acids; blocking it makes the plant turn chlorotic, then plant tissues become necrotic and the whole plant dies.
• Mobility: a residual herbicide with xylem- and phloem-mobile activity; absorbed through leaves and roots, it moves to areas of new growth in the xylem (water conducting tissues) or phloem (sugar conducting tissues).
• Timing: best applied while weeds are actively growing, and most effective on young plants in their vegetative phase.

Notes

• Can be applied in cold weather, but do not apply to frozen ground.
• Do not treat plants growing under stress, as this can reduce control.
• Where treated sites are later to be cleared or cultivated, allow six months between treatment and sowing or planting the following crop, AND cultivate the soil deeply.
• Avoid contact with non-target plants.
• Diflufenican builds up in the soil when this or other diflufenican products are used in successive years.
• For best results ensure good coverage, and do not cultivate or rake the area after application.
• DO NOT apply over drains or in drainage channels, gullies or similar structures that carry moving water.
• For professional use only.