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QUALI-PRO
Oryzalin 4 Pre-Emergent Herbicide
Oryzalin 4 Pre-Emergent Herbicide is a selective pre-emergent herbicide that controls annual grasses and broadleaf weeds on ornamentals, industrial sites, lawns, and fields. It can provide continuous weed control for up to eight months.
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Oryzalin 4 Pre Emergent Herbicide Product Page
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Oryzalin 4 Pre-Emergent Herbicide, manufactured by CSI, is a professional-grade pre-emergent that prevents weeds in ornamental plantings, lawns, and more.
The active ingredient is oryzalin, which eliminates the seedlings of unwanted annual grasses and broadleaf weeds to prevent their growth. It is ideal for use on ornamental flower beds or around various types of trees and bushes.
Oryzalin 4 Pre-Emergent Herbicide provides 2 to 8 months of continuous control, keeping targeted plants from emerging and taking over. It can be mixed with label-approved post-emergent herbicides for complete control.
Tools Needed
This product can be applied with a hose-end sprayer, a backpack sprayer, a handheld pump sprayer, or a skid sprayer. If targeted annual grasses or broadleaf weeds have already grown, a garden tool to remove the weeds is needed.
How to Use
- Step 1: To figure out how much Oryzalin 4 you need, you will need to determine the treatment area square footage. To do this, measure the treatment area's length and width in feet, then multiply them together (length X width = square footage). Oryzalin treatments should be done at a rate of 1.5 to 3 oz. per 1,000 square feet in a gallon of water, depending on your desired length of control. We recommend using 3 fl. oz. per 1,000 for 4 to 8-month control. If you have a 2,000-square-foot area to be treated, you would need 6 fl. oz. of Oryzalin 4 mixed with 2 gallons of water.
- Step 2: In a sprayer of your choice, add half the amount of water to the spray tank and then add the appropriate rate of Oryzalin 4 based on your calculations. Fill the tank the rest of the way with water and shake the spray tank to mix well.
- Step 3: Spray the desired areas to wet them and follow up with watering them with a minimum of 1/2 inch of water within 21 days of the initial application.
Where to Use
Oryzalin 4 can be used on ornamental flower beds or flower pots to control unwanted broadleaf weeds. It is ideal for commercial and residential landscaping with warm-season turfs, such as bahiagrass, Bermuda grass, buffalograss, centipede grass, St. Augustine Grass, and zoysiagrass. It can also be used around various trees, shrubs, ground covers or perennials, flowers, non-bearing fruit and nut trees, non-bearing vineyards, and more.
Do not use around a nursery, forest, or Christmas trees, seedling beds, cutting beds, or transplant beds. Do not apply Oryzalin 4 to pastures used for grazing, and do not feed treated hay to livestock.
When to Use
This product is best applied before unwanted annual grasses or broadleaf weeds have grown. Remove any unwanted grasses or weeds before applying Oryzalin 4.
Safety Information
Oryzalin 4 is safe to use around children and pets when applied according to the product label. Always wear the proper personal protective equipment (PPE) when mixing or applying this product.
Keep people and pets out of treated areas for 24 hours after application.
Special Considerations
Remove or till up all unwanted weeds that have sprouted or fully grown. Oryzalin 4 will not kill post-emergent weeds. It is safe to use around established trees, flowers, plants, and other vegetation listed on the product label. Before applying, read the label to ensure the non-targeted vegetation is on this list.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions | 32 Ounce: AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, VT, WA |
| Brand | QUALI-PRO |
| Keith's Pro Tips | "Before applying pre-emergent herbicides, use a soil thermometer to make sure applications are made before the soil reaches 55 degrees. For a more even application and for more flexibility with concentration, we recommend using a liquid herbicide." |
| Product Drawbacks | Oryzalin 4 is only effective before the weeds have emerged from the ground. It will not kill well established, grown weeds. For lawns and turf grasses where targeted weeds have begun to grow, we suggest using a post-emergent, selective herbicide like TopS |
| Target Pests | Oryzalin 4 Pre-emergent Herbicide controls for the following: Annual Bluegrass, Annual Sowthistle Spotted Spurge, Barnyardgrass, Bittercress, Black Mustard, Black Nightshade, Brachoaroa, Bristlegrass Foxtail, Browntop Panicum, Buffalograss, Carpetweed, Climbing Milkweed., Coast Fiddleneck, Coloradograss, Common Chickweed, Common Groundsel, Common Mallow, Common Purslane, Common Ragweed, Crabgrass, Crowfootgrass, Desert Rockpurslane, Fall Panicum, Field Sandbur, Florida Pulsey, Florida Purslane, Giant Foxtail, Goosegrass, Green Foxtail, Henbit, Horseweed, Italian Ryegrass, Johnsongrass, Junglerice, Ladysthumb, Lambsquarters, Large Crabgrass, Little Barley, London Rocket, Mexican Clover, Mexican Lovegrass, Orcutt Lovegrass, Pigeongrass, Prickly Lettuce, Prostrate Knotweed, Prostrate Pigweed, Prostrate Spurge, Pulsey, Puncturevine, Red Sprangletop, Redroot Pigweed, Redstem Filaree, Robust Foxtail, Shepherdspurse, Signalgrass, Silver Crabgrass, Smartweed, Smooth Crabgrass, Southwestern Cupgrass, Spring Pigweed, Teaweed, Texas Panicum, Tumble Pigweed, Velvetleaf, Volunteer Wheat, Watergrass, Wild Oat, Witchgrass, Yellow Foxtail, Yellow Wood Sorrel, Yellow Woodsorrel, Barnyardgrass, Morningglory, Wild Mustard |
| Application Equipment | Backpack Sprayer, Gloves, Hose End Sprayer, Pump Sprayer, Spray Rig |
| Application Methods | Broadcast Spray, Crack & Crevice, Spot Treatment |
| Active Ingredient | Oryzalin- 41% |
| Product Type | Herbicide |
| Formulation | Suspended Concentrate |
| Application Rate | Mix 3 ounces of Oryzalin 4 per 1 gallon of water for general applications made with a handheld pump sprayer. For more specific application rates please refer to the label. |
| Shelf Life | Oryzalin 4 will last for up to 1 to 2 years when stored according to the product label. Store Oryzalin 4 in the original container in a cool, dry storage area. |
| Yield | For general applications made with a handheld pump sprayer, a 2 gallon mixture will treat up to 1,000 square feet. 2.5 gallons of Oryzalin 4 will treat up to approximately 4.5 to 5 acres. |
| Use Sites | Outdoors |
| Time to Kill | This product prevents weeds from growing by killing the seedling. It will not kill weeds past the germination stage. |
| Comparable Products | Prodiamine 4L |
| Use Caution With | Bentgrass, Kentucky Bluegrass, Fescue, Fine, Fescue, Tall, Ryegrass, Zoysiagrass |
| EPA Registration # | 53883-369 |
| Restricted Use | No |
|---|---|
| Shipping Restrictions | AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, VT, WA |
| Availability | Online |
| Signal Word | CAUTION |
| Keith's Pro Tip | "Before applying pre-emergent herbicides, use a soil thermometer to make sure applications are made before the soil reaches 55 degrees. For a more even application and for more flexibility with concentration, we recommend using a liquid herbicide." |
| Time to Kill | This product prevents weeds from growing by killing the seedling. It will not kill weeds past the germination stage. |
| Chemical Type | Herbicide |
| Formulation | Suspended Concentrate |
| Application Methods | Broadcast Spray, Crack & Crevice, Spot Treatment |
| Product Drawbacks | Oryzalin 4 is only effective before the weeds have emerged from the ground. It will not kill well established, grown weeds. For lawns and turf grasses where targeted weeds have begun to grow, we suggest using a post-emergent, selective herbicide like TopS |
| Active Ingredient | Oryzalin- 41% |
| Application Equipment | Backpack Sprayer, Gloves, Hose End Sprayer, Pump Sprayer, Spray Rig |
| Mix Rate | Mix 3 ounces of Oryzalin 4 per 1 gallon of water for general applications made with a handheld pump sprayer. For more specific application rates please refer to the label. |
| Use Sites | Outdoors |
| Yield | For general applications made with a handheld pump sprayer, a 2 gallon mixture will treat up to 1,000 square feet. 2.5 gallons of Oryzalin 4 will treat up to approximately 4.5 to 5 acres. |
| EPA Registration No. | 53883-369 |
| Shelf Life | Oryzalin 4 will last for up to 1 to 2 years when stored according to the product label. Store Oryzalin 4 in the original container in a cool, dry storage area. |
| Comparable Products | Prodiamine 4L |
| Children or pets? | No |
| Property Characteristics | None |
*Price does not include freight. We guarantee our rate plus shipping will be less than anyone else's price.