50g Long Lasting Weed Control Herbicide

This professional, non-selective residual herbicide is applied pre-emergence. Once on the surface it stays active for up to 5 months, stopping susceptible broad-leaved and grass weeds from emerging on a range of non-crop surfaces and around amenity vegetation.

Key Features

• Long-lasting residual activity of up to 5 months from a single treatment
• Non-selective: controls a broad spectrum of annual and perennial broad-leaved weeds and grasses
• Pre-emergence action: forms a barrier on the surface that prevents a wide range of broad-leaved and grass weeds from germinating
• Low application rate of 150g/ha, applied once per year
• This 50g bottle treats 3,333m² for up to 5 months
• Has limited effect on very young weeds; tank mix with glyphosate to add post-emergence control to the long-lasting residual effect
• Water dispersible granule formulation

How to Use

When to Use

The herbicide works best when applied from early to late spring, before weeds have germinated. Recommended application window: February, March, April and May. Where weeds are already visible, tank mix with a suitable foliar herbicide such as glyphosate.

Application Details

Mixing and Application

1. Fill the spray tank with half of the water needed.
2. Add the required quantity of the herbicide and agitate thoroughly.
3. Top the tank up with water to the required level.
4. Use the spray solution straight away.
5. Do not cultivate or rake the treated area afterwards, so the barrier stays intact and persistence is maximised.
6. After use, clean the application equipment with a diluted ammonia solution.

For best results, leave the surface undisturbed after application so the barrier effect remains active.

Applications

• Natural surfaces not intended to bear vegetation – areas of soil or natural rock outcrops that are not meant to carry vegetation
• Permeable surfaces overlying soil – any man-made permeable surface (other than railway ballast) laid over soil and not meant to carry vegetation
• Hard surfaces (railway ballast only) – railway ballast surfaces not meant to carry vegetation
• Amenity vegetation (around) – areas of semi-natural or ornamental vegetation, including trees (see the product label for susceptible non-target plants)

Specifications

Active Substance: Flazasulfuron

• Bio-chemical mode of action: flazasulfuron is in the Acetolactate Synthase (ALS) inhibitor group of herbicides. ALS is a key enzyme in the biosynthesis of branched-chain amino acids; blocking it makes the plant turn chlorotic, followed by necrosis of plant tissue and then death of the whole plant.
• Mobility: a systemic penetrant, so the active substance moves downwards through the plant in the phloem (sugar-conducting tissue) and upwards in the xylem (water-conducting tissue).
• Application timing: residual ALS inhibitors give the best results when applied before weeds emerge.
• Resistance: ALS inhibitor herbicides carry a high risk of resistance, especially in grass weeds such as black-grass, Italian rye-grass and wild oats. Follow the label instructions and rotate with herbicides that have different modes of action to reduce this risk.

Notes

• A Local Environment Risk Assessment for Pesticides (LERAP) must be completed in line with CRD's published guidance before every spraying operation with a horizontal boom sprayer.
• Use only on natural or porous surfaces such as gravel where the user can confirm the underlying surface is soil, and on railway ballast.
• Must not be applied to any non-porous man-made surface.
• Avoid spray drift onto non-target plants.
• To prevent resistance building up, do not apply this or any other ALS inhibitor herbicide for grass weed control more than once per year.
• When treating around amenity vegetation, do not apply near species planted less than 2 years ago.
• Do not let direct spray fall within 5m (horizontal boom and train sprayers) or 1 m (hand-held sprayers) of the top of the bank of any static or flowing water body.