T/I 2.5 G Herbicide

Have a Question? Ask Our Pros!

Call Us: 866-581-7378
Mon-Fri 9am-5pm ET
Email Our Pros
We're here to help
Live Chat
Offline. Leave Us a Message

You May Also Need

Average Rating

5 out of 5 stars Rating: 5

4 Reviews | 3 Q&A

Product Overview

T/I 2.5G (Triflurafin-Isoxaben) is a selective pre-emergent, granular herbicide that protects turf from more than 100 different species of broadleaf weeds and grasses. Great for christmas tree plantations, nurseries, ornamentals, trees, and landscapes. Just place the product in a broadcast or drop spreader, then spread the product in the target area, to get full control of weeds like bittercress, foxtail, and ragweed.

Features and Specs

Active Ingredient Trifluralin 2% Isoxaben 0.5%
Target pests Barnyardgrass, Bittercress, Common Chickweed, Foxtail, Goosegrass, Groundsel, Marestail, Oxalis, Ragweed, Spurge
*See Complete list on label for more
For use in Nursery, Landscape, Non-crop areas, Ornamentals, Conifer Trees
Application Broadcast or Drop Spreader
Broadcast application Use a Rate of 2.30 to 4.60 pounds per 1,000 square feet
Pet safe Yes, if used as directed on Label
Formulation Professional Product
Coverage Area 50 lbs. will Treat an estimated 10,000 square feet
Time to Kill Begins to eliminate target weeds within hours of application
Take up to Several Weeks to completely kill the target weeds
Shipping Weight 52.11 lbs
Manufacturer Quali-Pro (Mfg. Number: 83013967)
EPA Registration 53883-435



Quali-Pro T/I 2.5 G is a granular herbicide containing two active ingredients, isoxaben (0.5%) and trifluralin (2.0%) for broad-spectrum preemergence control of selected broadleaf weeds and annual grasses. Use a drop- or rotary-type spreader designed to apply granular herbicides or insecticides to apply Quali-Pro T/I 2.5 G. See APPLICATION INSTRUCTIONS for specific directions on spreaders and settings.

Quali-Pro T/I 2.5 G controls weeds growing from seeds. The active ingredients are absorbed through unemerged plant shoots and inhibit cell wall growth. They are not mobile within the plant. Selected broadleaf weeds and annual grasses are killed before they emerge. Quali-Pro T/I 2.5 G does not control weeds already established or those growing from stolons, rhizomes, or root pieces. Length of control varies with the rate of Quali-Pro T/I 2.5 G applied, weed infestion, temperature, amount of water applied, soil conditions, or type of potting media, among other factors. Additional applications of Quali-Pro T/I 2.5 G may be needed to provide residual control over time.

Apply Quali-Pro T/I 2.5 G immediately after cultivation or prior to germination of target weeds in landscape ornamentals, container and field-grown ornamentals, nursery stock, Christmas trees, ground covers/perennials, non-bearing fruit and nut trees, non-bearing vineyards, and non-cropland areas. Apply Quali-Pro T/I 2.5 G at 100 to 200 lbs per acre (2.3 to 4.6 lbs per 1000 sq ft). After application, observe the level of weed control obtained over time and decide if additional applications are needed for control. Do not make applications of 150 lbs per acre or higher prior to 60 days after a previous application of Quali-Pro T/I 2.5 G. The maximum application rate per acre for Quali-Pro T/I 2.5 G within a 12-month period is 600 lbs.

The weight-to-volume conversion table below provides equivalent amounts of Quali-Pro T/I 2.5 G for use.

Broadcast Rates For quali-Pro T/I 2.5 G

Rates (lbs/Acre) Amount/1000 sq. ft. Amount/1000 sq. ft. Amount/100 sq. ft. Amount/100 sq. ft.
lbs/Acre lbs Qts. lbs Cups
100 2.30 1.75 .23 0.7
150 3.45 2.60 .35 1.0
200 4.60 3.50 .46 1.4

1 lb of Quali-Pro T/I 2.5 G = 0.75 quart = 3 cups

5 stars   4
4 stars   0
3 stars   0
2 stars   0
1 star   0
Review Search   
Sort Reviews
  • 5 of 5 Stars

    Great Product - easy to apply and best price

    By Carol on 03/13/2020

    I wanted an alternative to Preen that came in bulk. I have large ornamental gardens. So I did alot of price comparison and ingredient comparison. This product is a better, broader spectrum weed abatement product. With all types, one needs to kill all the already emerged weeds. A tiny drop of glyophosphate will do this. Broadly applying the T/I will set you up for the rest of the summer. Thank you for your prompt shipping and the best online price I could find.

    Was this review helpful to you?  YesNo

    4 of 4 people found this review helpful

  • 5 of 5 Stars

    T/l 2.5 G Herbicide

    By Janet on 04/12/2019

    It came exactly as described and on time. I couldn't be happier with this purchase and will purchase it again.

    Was this review helpful to you?  YesNo

    0 of 2 people found this review helpful

  • 5 of 5 Stars

    Great servicd

    By Janice on 04/12/2019

    This was my first order. I found the ordering to be easy and my product arrived on time, as promised. I

    Was this review helpful to you?  YesNo

    0 of 2 people found this review helpful

  • 5 of 5 Stars


    By George on 08/30/2019

    Very helpful company. Have not used product yet. Many questions answered already.

    Was this review helpful to you?  YesNo

    0 of 2 people found this review helpful

See all 4 customer reviews

Questions & Answers

Have a question about this product?
Sort Questions
How long does the T/I 2.5 G Herbicide keep weeds out for?

3 months? 6 months?


According to the manufacturers documents, T/I 2.5 G Herbicide will have up to 8-months of selective pre-emergent control of more than 100 broadleaf weeds and grasses with a single application.

Was this answer helpful to you?  YesNo

2 of 2 people found this answer helpful

Can I use T/I 2.5 G Herbicide in my lawn?

Reading here to see whether this product can be applied to lawns? Saint Augustine Floratam?


T/I 2.5 G Herbicide

Was this answer helpful to you?  YesNo

2 of 2 people found this answer helpful

Is T/I 2.5 G Herbicide made in a liquid formulation?


Was this answer helpful to you?  YesNo

See all 3 customer questions