Description
What is Barricade Pre Emergent?
Barricade Pre Emergent is a Group D selective pre-emergent herbicide from Syngenta, containing 480 g/L prodiamine. Applied before weeds germinate, it forms a barrier in the top layer of soil that stops weed seedlings establishing in lawns, garden beds and potted plants, with control lasting up to six months per application.
Who it’s for
It suits homeowners with established lawns — including buffalo, couch, kikuyu, paspalum, zoysia and other common Australian turf types — as well as garden beds and potted plants. This 250 mL pack is the smallest size, suited to a single garden bed, a few pots, or a small lawn area rather than a full-sized lawn. It’s not for use on newly seeded, newly laid or sprigged turf, in vegetable gardens, or around fruit trees or sensitive plants.
Why it works
Prodiamine only controls weeds at the germination stage — it doesn’t kill weeds that are already established — so timing matters. Apply before weed emergence, ideally in early spring or from late summer to early autumn, for effective preventative control.
Analysis / Specs
- 480 g/L Prodiamine
- Group D herbicide
- Residual control for up to 6 months per application
- Apply before weed emergence
Pack size
Supplied in 250 mL.
Application Rates
Established Lawns and Turf
Garden Sprayer
• Use 30 mL per 10 litres of water
• Covers 100 square metres
Watering Can
• Mix 3 mL in 9 litres of water
• Apply evenly over 10 square metres
Timing
• For summer weeds: apply in early spring
• For Winter Grass: apply late summer to early autumn
• Must be applied before weed emergence
• Residual control lasts up to 6 months
Watering In
• Lightly water in within 24 hours of application
Garden Beds and Potted Plants
Garden Sprayer
• Use 40 to 80 mL per 10 litres of water
• Covers 100 square metres
Watering Can
• Mix 4 to 8 mL in 9 litres of water
• Apply evenly over 10 square metres
Timing and Notes
• Apply before weed emergence
• Provides up to 4 months control in potted plants
• Provides up to 6 months control in garden beds under mulch
• Use higher rates where weed pressure is high
• Apply to soil before mulching, not over the top of mulch
• Wash in with a minimum of 3 mm irrigation or rain
Important Restrictions
(from page 2 of the label)
• Do not apply to turf under stress, newly seeded or newly laid turf
• Delay use until turf is fully established with root depth beyond 3 cm
• Do not apply if heavy rain is expected within 48 hours
• Do not irrigate to runoff within 3 days
• Do not apply over mulch
• Do not plant seeds in treated soil for 6 months
• Do not re enter until spray has dried
Mixing Instructions
(from pages 2 and 3)
• Shake bottle well before opening
• Add half water first, then product, then top up
• Agitate before spraying
• Only mix enough for same day use
Tips for Use
Shake well before opening
Barricade must be shaken thoroughly so the active constituent disperses evenly before mixing.
Mix correctly for the application area
Add half the water first, add the measured Barricade dose, then top up with the remaining water. Agitate before use.
Only mix enough solution for the area being treated and for the same day of application.
Apply before weed germination
Barricade controls weeds only at the germination stage. Existing weeds will need a post emergent first.
Choose the right timing for the season
Use in early spring for summer weeds, and from late summer to early autumn for Winter Grass. This gives the barrier maximum effectiveness.
Measure your lawn or garden area first
This ensures the correct amount of mixture is prepared and prevents under application or over application.
Apply evenly across the entire surface
Spray or pour the mixture evenly to create a consistent layer in the upper soil profile. This is critical for proper barrier formation.
Lightly water in after application
Water the area within 24 hours to activate the herbicide and move it into the top layer of the soil.
Avoid watering to runoff for the first three days.
Do not apply to stressed or newly planted turf
Wait until turf is fully established with a developed root system at least 3 cm deep before applying.
Do not apply over mulch
For garden beds, apply to the soil surface and wash in before mulch is added.
Allow spray to dry before re entry
Do not allow people or pets to enter treated areas until the application has dried completely.
Wash equipment after use
Rinse sprayers, nozzles and watering cans thoroughly to prevent residue buildup.
Active Ingredients
Prodiamine 480 g per litre
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