• New

Propyzamide 500SC 1L Herbicide David Grays Winter Grass


Active ingredient: 500g/L Propyzamide.

Last items in stock

For selective control of Winter Grass in lawns.

A selective pre and post-emergent weed killer to control winter grass in couch and buffalo lawns.

Do not use it on bluegrass, ryegrass, fescue, or bentgrass lawns.

Host Pest
Buffalo Grass Lawn Or Turf, Common Couch Lawn Or Turf, Queensland Blue Couch & Turf, and Lawn Winter Grass
Clover - Seed Production, Clover For Hay Production, Clover Grown For Forage, Lucerne - Hay Or Seed Production, Lucerne Grown For Forage, Medic Grown For Seed Production, Medics Grown For Forage & Medics Grown For Hay Annual Ryegrass, Barley Grass, Blackberry Nightshade, Browntop Bent, Canary Grass, Chickweed, English Couch Or Rope Twitch, Great, Ripgut Or Kingston Brome, Paterson's Curse, Perennial Ryegrass, Prairie Grass, Silver Grass Or Rat's-tail Fescue, Sorrel - Seedling, Squirrel-tail Fescue Or Silver Grass, Wild Oat, Winter Grass, Wireweed Or Knotweed - Seedling, Yorkshire Fog Grass
Lettuce - Direct Seeded & Lettuce - Transplants Barnyard Grass Or Water Grass, Blackberry Nightshade, Chickweed, Nettle, Portulaca, Prince Of Wales Feather, Ryegrass, Shepherd's Purse, Summer Grass, Winter Grass, Wireweed, Knotweed Or Hogweed

General Instructions:

  • Best results are obtained by applying the product to cool, wet soil.
  • When used in Turf, Surefire Propyzamide 500 SC Herbicide must be watered-into the soil to be effective on germinating seed.  
  • It is Ideally applied around Mid-Autumn or as the climate gets colder and the days get shorter, and will be effective during the entire Autumn-Winter-Spring cycle. 


  • Prior to pouring, shake container vigorously, then add the required quantity of Surefire Propyzamide 500 SC Herbicide to water in the spray vat while stirring or with agitators in motion. 
  • Do not mix with other pesticides.


  • Store in the closed, original container in a dry, cool, well ventilated area, out of direct sunlight. 
  • Keep from contact with fertilisers, insecticides, fungicides and seeds. 
  • Protect from frost.


  • Do not use Surefire Propyzamide 500 SC Herbicide on heavy red and peat soils.

Safety Directions:

  • Will irritate the eyes and skin. 
  • Avoid contact with eyes and skin. 
  • When preparing the spray and using the prepared spray, wear cotton overalls buttoned to the neck and wrist, washable hat and elbow-length PVC gloves. 
  • After use, wash hands, arms and face thoroughly with soap and water. 
  • After each day’s use, wash gloves and contaminated clothing.

First Aid:

  • If poisoning occurs, contact a doctor or Poisons Information Centre. Phone Australia 13 11 26.
  • Additional information is listed in the Safety Data Sheet SDS.

What Is Winter Grass:

Botanical name: Poa annua


  • A grassy winter annual with perennial and biennial bio-types observed in some regions. Light green in colour with a tufted growth habit and a white panicle inflorescence germinating from Late winter throughout spring and summer. 
  • Leaf blades possess a folded venation with a long ligule and boat-shaped leaf tips that curl up at the ends.
  • A highly adaptive weed that can thrive in shaded areas and full sun depending on moisture conditions. 
  • Tolerates low mowing heights and can persist in golf greens all year round. 
  • Plants reach maturity quickly and seed profusely making them an aggressive weed that can be difficult to control.

Directions Of Use

Directions for Use:

Turf & Lawns – Winter Grass Control

Common Couch


    • 1.2L/Ha (12mL/100 sqm) – All States
    • 170mL per 37m x 37m (Bowling Green)

QLD Blue Couch


    • 0.6L/Ha (0.6mL/100 sqm) – QLD Only
    • 85mL per 37m x 37m (Bowling Green)

Buffalo Grass


    • 1.2L/Ha (12mL/100 sqm) – WA Only
    • 170mL per 37m x 37m (Bowling Green)

Critical Comments: 

  • Apply during the autumn and winter to established turf infested with seedling winter grass.  
  • Sufficient water should be used to ensure uniform coverage.  
  • Irrigate immediately following application with the equivalent of 12 to 25mm rainfall and repeat watering after 24 hours.  
  • A repeat treatment may be necessary on QLD Blue Couch after 4 weeks.  
  • Do not reseed for 60 days after treatment.  
  • Use only on established turf.  
  • Do not use on bluegrass, ryegrass, fescue or bentgrass lawns.

Lettuce – to control Barnyard Grass Or Water Grass, Blackberry Nightshade, Chickweed, Nettle, Portulaca, Prince Of Wales Feather, Ryegrass, Shepherd’s Purse, Summer Grass, Winter Grass, Wireweed, Knotweed Or Hogweed

Lettuce Direct Sown

Rate: 4.5L in 330-550L of water per Ha – All States

Critical Comments:

  • Apply pre-emergence immediately after sowing.
  • To ensure the best results, the seed-bed should be well prepared and free from clods.  
  • Sprinkler irrigation after the application is desirable.

Lettuce Transplanted

Rate: 2.3L in 330-550L of Water per Ha – Vic Only

Critical Comments:

  • Apply immediately after transplanting to clean, freshly worked soils, well prepared and free from clods.
  • Sprinkler irrigation after the application is desirable.

Lucerne, clover, medics, etc., grown for forage, hay, or seed production.

Weeds Controlled: Annual ryegrass, winter grass, barley grass, silver grass, prairie grass, canary grass, great brome, squirrel tail fescue, and rat’s tail fescue.

Rate: 1-1.5L per Ha – ACT, NSW, SA, TAS & WA

Lucerne, clover, medics, etc., grown for forage, hay, or seed production.

Weeds Controlled: Wild Oats, perennial ryegrass, bentgrass, English couch, Yorkshire fog grass, chickweed, seedling sorrel, blackberry nightshade, Patterson's curse, and seedling wireweed.

Rate: 1.5-2L per Ha- ACT, NSW, SA, TAS & WA

Critical Comments: 

  • Seedling Crops: Apply after the third trifoliate leaf is fully developed
  • Established Crops: apply any time before the end of July.
  • Weeds: Apply when weeds are at the post or pre-emergent stages.

Best Results: 

  • When applied during cool and moist conditions.
  • Rain or irrigation necessary to thoroughly wet the top 3 to 4 cm of soil.  This is similar to 25 mm of rain.
  • Use a higher rate on heavy soils, if conditions are not optimal or where a heavy grass population is expected.
  • Grazing or cutting before treatment is recommended.

Rates are a general guide only. Before opening, carefully read Surefire Propyzamide 500 SC Herbicide Directions for Use, Precautionary and Protection Statements, Storage and Disposal, Safety Directions and First Aid Instructions.

Withholding Period Details (WHP):

  • Do not harvest, graze or cut for stock food or for seed for 25 days after application.

Data sheet


You might also like

Related Products ( 16 other products in the same category )