50g Herbicide for Broad-Leaved Weeds and Grasses

This is a long-lasting residual herbicide based on flazasulfuron, supplied in a 50g bottle. Once applied, it stays active on the treated surface for up to 5 months, forming a barrier that stops susceptible broad-leaved and grass weeds from emerging on a range of non-crop surfaces and around amenity vegetation.

Key Features

• Residual activity on treated surfaces for up to 5 months
• Pre-emergence control: creates a surface barrier that prevents germination of a wide range of broad-leaved and grass weeds
• Suitable for a number of non-crop surfaces and for use around amenity vegetation
• 50g bottle treats 3333m² for up to 5 months
• Active ingredient: 25% w/w flazasulfuron

How to Use

When to Use

This herbicide works best when applied from early to late spring, before weeds have germinated (application window: Feb, Mar, Apr, May).

It has only a limited effect on very young weeds, so it should generally be tank mixed with glyphosate to give effective post-emergence control alongside its long-lasting residual action. For best results, leave the surface undisturbed after application so the barrier stays active.

Mixing and Application

1. Fill the spray tank with half of the water required
2. Add the required quantity of herbicide and agitate thoroughly
3. Top up the tank with water to the required level
4. Use straight away
5. For the longest persistence, do not cultivate or rake the treated area after application
6. After use, clean the application equipment with a diluted ammonia solution

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): any railway ballast impermeable surface not meant to carry vegetation
• Amenity vegetation (around): any areas of semi-natural or ornamental vegetation, including trees (check the product label for susceptible non-target plants)

Specifications

Active Substance: Flazasulfuron

Mode of action: flazasulfuron is an Acetolactate Synthase (ALS) inhibitor. Acetolactate synthase is a key enzyme in the production of branched-chain amino acids. ALS inhibitors block this process, so the plant first turns chlorotic, then its tissues become necrotic, and finally the whole plant dies.

Mobility: as a systemic penetrant, it is moved down through the plant in the phloem (the sugar-conducting tissue) and up through the plant in the xylem (the water-conducting tissue).

Application timing: residual ALS inhibitors work best 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. To lower this risk, follow the label instructions and rotate with herbicides that have different modes of action.

Notes

• A small number of weed species are not effectively controlled by this herbicide; see the label for details.
• 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.
• Only for use on natural or porous surfaces, such as gravel, where the user can confirm that soil lies underneath, and on railway ballast.
• Must not be applied to any non-porous man-made surface.
• Avoid spray drift onto non-target plants.
• When treating around amenity vegetation, do not apply near plants that have been in the ground for less than 2 years.
• Do not allow direct spray to fall within 5 m (horizontal boom and train sprayers) or 1 m (hand-held sprayers) of the top of the bank of any static or flowing water body.