Groguard 20kg (Herbicide)

GROGUARD is a Selective Herbicide that provides residual and post‑emergence control of Broadleaf and Grass Weeds in Forestry, Lucerne, Maize, Sweetcorn, Peas, certain Orchard Crops and non-crop situations.
ACTIVE INGREDIENT:
Contains 900 g/kg Terbuthylazine in the form of a Water Dispersible Granule (WG).
Weed Spectrum & Limitations:
Controls numerous Annual Grasses and Broadleaf Weeds:
- Barley Grass.
- Black Nightshade.
- Browntop.
- Catsear.
- Chickweed.
- Clovers.
- Cocksfoot.
- Dove's Foot.
- Fat Hen.
- Kentucky Bluegrass.
- Lotus.
- Nodding Thistle.
- Poa spp.
- Redroot.
- Scotch Thistle.
- Seeding Gorse.
- Shepherd's Purse.
- Storksbill.
- Sweet Vernal.
- Willow Weed.
- Yorkshire Fog.
DOES NOT CONTROL deep‑rooted Perennial Grasses (Paspalum, Kikuyu, Indian Doab) without tank‑mix adjustments.
Crop-specific Rates and Notes:
LUCERNE (Established):
- 830 g – 1.1 kg/ha in 200–300 L/ha.
- Stands ≥2 years; mix with 2–3 L Paraquat 20% a.i.; apply when dormant and closely grazed; mid‑winter preferred.
- Use higher rate for Clovers/longer residual; do not exceed higher rate.
- Withholding Period: Lucerne – 28 days.
ORCHARDS (Pipfruit, Citrus, Grapes, Kiwifruit):
- 3.3–4.4 kg/ha in 200–300 L/ha.
- Do not apply to Trees/Vines <1 year old or Plants in light sandy soils.
- Pre‑emergence: spring to weed‑free soil.
- Post‑emergence: tank mix with Glyphosate for Established Weeds.
MAIZE & SWEETCORN:
- 1.7–2.0 kg/ha in 200–300 L/ha.
- Pre‑Emergence application after sowing but before emergence; add suitable Herbicide for Grass Weeds.
PEAS:
- Pre‑emergence rate 830 g – 1.1 kg/ha in 200–300 L/ha to freshly worked seedbed after sowing but before emergence (avoid light sandy/low organic soils).
- Post‑emergence rate 1.7 kg/ha in 200–300 L/ha to actively growing Weeds ≤5 cm; add non‑ionic surfactant.
- Note: for Triazine‑Resistant Weeds (e.g., Fat Hen) add appropriate Post‑emergence Herbicide (e.g., Dicamba).
FORESTRY (Radiata Pine, Douglas Fir, Specified Eucalyptus):
- Broadcast 8.3–11.0 kg/ha in 150–300 L/ha (best on Bare Ground or Weeds <10 cm before spring growth).
- Spot: apply 42–55 g per litre spray solution at 20 mL spray solution per m² (≈0.83–1.1 g/m²).
- For Predominant Grass Weeds, Tank‑mix with Clethodim 240 (label rates) + Result Spraying oil; Use higher GROGUARD rate for Gorse Seedlings.
INDUSTRIAL WEED CONTROL (Roadsides, Footpaths, Pipelines, Storage/Waste Sites):
- Apply 8.3–11.0 kg/ha. Tank‑mix Glyphosate for existing Vegetation Knockdown and Deep‑rooted Perennials.
Calibration/Example Spot Rates:
Broadcast Forestry: 8.3–11.0 kg/ha in 150–300 L/ha.
- Spot: 42–55 g per litre spray solution; apply 20 mL spray solution per m² (≈0.83–1.1 g/m²).
Hazard Classifications & Warnings:
Acute oral toxicity Cat 4; Acute inhalation toxicity Cat 4; Aquatic acute & chronic Cat 1; hazardous to Soil Organisms; hazardous to Terrestrial Vertebrates.
WARNING: Harmful if Swallowed or Inhaled.
- Very toxic to Aquatic Life and Soil Environment.
- Spray drift hazard — avoid off‑target movement.
- DO NOT apply directly into/onto Water.
Regulatory / Qualifications / Rcords:
- Person mixing/loading/applying must meet label qualifications (qualified as required by HSNO).
- Keep NZS 8409 records if ≥3 kg applied within 24 h and likely to leave area.
Personal Protection & Handling:
- Wear Overalls, Impervious Gloves and Eye/Face Protection when Mixing/Applying.
- Avoid inhaling Spray/Dust.
- Wash Hands and exposed Skin before Breaks/Meals and after Work.
- Clean Clothing/Equipment before reuse.
Storage & Transport:
- Store in original container, tightly closed, secure, dry and cool; follow NZS 8409.
- Stores >100 kg require signage, secondary containment and emergency response plan.
- Do not carry on passenger service vehicle.
First Aid:
- For advice call National Poisons Centre 0800 POISON (0800 764 766).
- IF SWALLOWED: rinse mouth, call poisons centre/doctor if unwell.
- IF INHALED: move to fresh air and rest.
- IF ON SKIN: wash with soap and water.
- IF IN EYES: rinse cautiously for several minutes; remove contact lenses and continue rinsing.
- Seek medical advice if symptoms persist.
Spillage & Emergency:
- Wear PPE, contain spills, absorb with inert material, collect in labelled sealed drums for disposal.
- Prevent contamination of drains/streams; warn local water authority if contamination unavoidable.
- Emergency response: 0800 CHEMCALL (0800 243 622).
Disposal:
- If possible use product according to label.
- Recycle empty packaging via Agrecovery or dispose at approved landfill.
- Avoid contaminating water supplies.
Ecotoxicity & Environmental Notes:
- Hazardous to Aquatic Organisms and Soil Organisms; avoid contamination of Water Bodies.
- Rain within 3 hours reduces efficacy; rainfall/irrigation within 1 week needed to optimize residual control for some uses.
Mixing & Application:
- For Pre‑Emergence: apply to Weed‑Free, freshly worked Seedbed.
- For Post‑Emergence: Tank‑mix with Glyphosate (for knockdown) where established Weeds exist; add non‑ionic surfactant for some Post‑Emergence uses as directed.
- Ensure Calibration of Equipment and use recommended Water Volumes (see Crop entries).
- For Forestry spot treatment, apply measured g/m² in sufficient water for coverage.
Resistance Management:
- GROGUARD contains GROUP 5 Triazine Herbicide (Terbuthylazine).
- Resistant Biotypes exist; avoid continuous use of same group and rotate/alternate Herbicide modes of action.
Application Timing & Efficacy Notes:
- Absorbed via Roots and Foliage; activity appears in 1–3 weeks.
- Rain within 3 hours reduces efficacy; rainfall/irrigation within 1 week may be necessary to activate residual control.
- For Pre‑Emergence apply to Weed‑Free soil; for Post‑Emergence control keep Weeds Small/Young for best results.
Caution:
Must be used strictly according to label directions.

Available in a 10Kg.