SKU: 80171104648
onion grass selective herbicide

onion grass selective herbicide Odessa Herbicide (onion weed treatment) – Mighty Goat Lawns

Sale price$25.79 Regular price$28.65
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Description

onion grass selective herbicide Odessa Herbicide (onion weed treatment) – Mighty Goat LawnsOdessa herbicide is a premium, selective post emergent weed killer which treats a wide range of broadleaf & grassy weeds in lawns including waxy and hard to kill varieties such as Onion Weed. What it Controls Odessa targets a wide variety of durable weeds in lawns including: Bindii (Soliva sessilis), Black thistle (Cirsium vulgare), Cat's ear (Hypochoeris radicata), Cotula (Cotula australis), Cudweed (Gnaphalium sp.), Guildford Grass (Onion Grass)

Odessa herbicide is a premium, selective post-emergent weed killer which treats a wide range of broadleaf & grassy weeds in lawns including waxy and hard to kill varieties such as Onion Weed.

What it Controls

Odessa targets a wide variety of durable weeds in lawns including:

  • Bindii (Soliva sessilis),
  • Black thistle (Cirsium vulgare),
  • Cat's ear (Hypochoeris radicata),
  • Cotula (Cotula australis),
  • Cudweed (Gnaphalium sp.),
  • Guildford Grass (Onion Grass) (Romulea rosea),
  • Medic (Medicago spp.),
  • Mouse ear chickweed (Cerastium vulgatum),
  • Oxalis (Oxalis corniculata),
  • White Clover (Trifolium repens),
  • False onion weed / Fragrant false garlic / Onion weed (Nothoscordum gracile, fragrans or borbonicum)
  • Ryegrass, perennial (Lolium perenne)

Why it's Popular

Targeted Weed Control: Effectively treats stubborn waxy leaf weeds such as Oxalis and Guildford Grass that other weed killers struggle to eliminate.

Safe on Lawns: Can be used on a wide range of turf varieties including Buffalo, Couch (Not QLD Blue) and Kikuyu.

Systemic Action:  It is absorbed by foliage and shoots then rapidly translocated through the plant and acts by inhibiting acetolactate synthase (ALS) to ensure complete eradication of the weed.

Key Features

  • Outstanding post emergent control of difficult to kill weeds Onion weed, Guildford grass (Onion grass)
  • Excellent Turf Tolerance on Common Couch, Hybrid Couch, Buffalo and Kikuyu (DO NOT use on Queensland Blue Couch)
  • Selectively controls of Ryegrass out of Common Couch, Hybrid Couch, Buffalo and Kikuyu
  • Controls a unique scope of difficult to kill weeds
  • Low odour
  • Low poison schedule (Schedule 5 - CAUTION)

Active Ingredient

  • 100 g/kg iodosulfuron-methyl-sodium

Application and Dosage

  • 0.25 to 1.5g per 100sqm
  • 50g pack treats 3300+ sqm of lawn
  • Spray onto a dry lawn with a pressure sprayer and let it dry. Do not water product in. Avoid mowing at least 4 days before and after spraying.
  • For optimal control mix in a surfactant such as Wetter 600, particularly important with stubborn, waxy weeds.

Odessa Cost Per Application - Cost per 100sqm at a rate of 1.5g per 100sqm is $2.97 including GST

More Information

Odessa Herbicide allows turf managers to control the various difficult weeds that other herbicides have struggled to manage such as Guildford Grass (Onion Grass) (Romulea rosea) in Common Couch, Hybrid Couch, Buffalo or Kikuyu turf stands.

Brochure

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 80171104648

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4.1 ★★★★★
Based on 19 reviews
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Product Reviews
J
Verified Purchase
JRTX
Whiting, US
★★★★★ 5
Worked perfectly for me. Sorry I waited so long.
Size: 1 Gallon + Tool, Set name: Off-Road Formula
I was clearing a field full of mesquite trees, and my tractor tires were getting destroyed. Mesquite has nasty 3-inch thorns, and I was plugging tires constantly. Eventually, all four tires were flat at the start of each day. These tires had been plugged more than 10 times each. I bought FlatOut Quick Strike and followed the instructions exactly. The pump dispenses about 1 oz per pump, so I put 30 pumps in each tire, and the bottle was mostly empty by the time I finished. Typical with any pump dispenser it was also difficult to get the last bit out of the bottle using the pump. It’s been a week now. One tire has lost about 1 PSI, but the other three are still holding exactly where I set them. Considering how badly these tires were damaged, I’m impressed so far. This is the first time I’ve gone more than a day without dealing with flats in that field.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 13, 2026
D
Verified Purchase
Duncan Souza
Waukegan, US
★★★★★ 4
Pump is worthless
Size: 1 Gallon + Tool, Set name: Small Tire/Bicycle Formula
The sealant is good. The gallon pump is a joke. Pump stopped working 4 pumps in. Went and got another replacement pump from automotive store, also broke after 4 pumps. Ended up cleaning out an old Slime bottle and pouring in the flat out sealant in the slime bottle, so I could actually get it in my tires.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
A
Verified Purchase
Amazon Customer
Draper, US
★★★★★ 1
There seems to be a chronic problem with the provided dispensing pump.
Size: 1 Gallon + Tool, Set name: Off-Road Formula
I looked at online reviews of the product performance and was impressed by its purported ability seal tire punctures. While the product may (or may not) perform well, the provided dispensing pump is pathetically unsuited for the application and it is impossible to clear the pump once the material clogs the small dispensing port. Some of the reviews indicated this but i assumed that they were not very mechanical inclined customers. The product, by design, has particulates, of varying sizes, suspended in the liquid sealant. The port on pump is very small and easily becomes blocked with the sealant and particulates that cannot be cleared; even when following the instructions to do so. It is very irresponsible for the manufacturer to continue selling this item with inevitable relative failure of the pump as this is the only way to get the sealant into a tire.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 2, 2025
V
Verified Purchase
VT
Birmingham, US
★★★★★ 5
Good for ebike tires
Size: 1 Gallon + Tool, Set name: Small Tire/Bicycle Formula
Got it for my son’s older ebike that my wife rides now. He kept on popping tubes, maybe because of his weight. Anyhow, I fixed it up for my wife and put some FlatOut in it to prevent flats. Seems to work so far. Got the off road FlatOut for my ebike’s fat tires. Easy to add to the tires. The pump clogs up but it’s easy to clean. I will always add this to all tires moving forward!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
B
Verified Purchase
Brian ward
Lake Worth, US
★★★★★ 5
Easy to use and works great
Size: 1 Gallon + Tool, Set name: Off-Road Formula
Easy to use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026

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