Choosing the Right Trimac Herbicide: A Comparison of Trimac, Trimac Plus, and Trimac GR

Choosing the Right Trimac Herbicide: A Comparison of Trimac, Trimac Plus, and Trimac GR

Weed management is crucial for maintaining commercial and industrial sites, fence lines, rights of way, and forestry plantations. Choosing the right herbicide can make all the difference in achieving effective, long-lasting weed control. In this blog, we compare three powerful weed control solutions—Trimac, Trimac Plus, and Trimac GR—helping you determine which one best suits your needs.

 

Trimac, Trimac Plus, and Trimac GR – What’s the Difference?

Each of these herbicides is formulated for specific applications and weed control requirements. While all three products share similar active ingredients, their concentrations, formulations, and target weed species vary.

 

Feature	Trimac Herbicide	Trimac Plus Herbicide	Trimac GR Herbicide
Active Ingredients	880 g/kg Terbacil, 40 g/kg Sulfometuron Methyl	400 g/kg Terbacil, 18 g/kg Sulfometuron Methyl, 341 g/kg Clopyralid	44 g/kg Terbacil, 2 g/kg Sulfometuron Methyl
Herbicide Group	Group 5, 2	Group 5, 2, 4	Group 5, 2
Formulation	Water-dispersible granules	Water-soluble granules	Granular (dry)
Application Method	Boom spray, handgun	Boom spray, handgun	Granular spread (no mixing)
Best For	Industrial sites, roadsides, fence lines, forestry plantations	Industrial sites, roadsides, rights of way, forestry plantations	Forestry plantations, bare soil applications
Target Weeds	Annual and perennial weeds, fog grass	Broadleaf weeds, hard-to-kill perennials	Annual and perennial weeds, couch grass, windmill grass
Residual Control	Long-lasting	Extended weed control	Extended soil residual effect

 

Trimac Herbicide – Industrial Strength Weed Control

Trimac Herbicide is designed for long-term weed suppression, offering both pre-emergent and post-emergent control. It is particularly effective in high-traffic industrial areas, including roadsides, powerlines, and fence lines. When applied correctly, it provides extended residual weed control, preventing regrowth for months.

Best For:

• Commercial and industrial sites

• Rights of way and roadsides

• Forestry plantations (pre-planting control)

Active Ingredients:

• 880 g/kg Terbacil (Photosynthesis inhibitor)

• 40 g/kg Sulfometuron Methyl (ALS inhibitor)

Key Advantages:

• Effective against annual and perennial weeds

• Strong residual activity for long-term control

• Can be mixed with Glyphosate for improved knockdown

• Suitable for boom spray or handgun application

Application Tip:

• Apply Trimac to bare soil or small weeds (up to 10cm in height) to maximize its effectiveness.

Trimac Plus Herbicide – Enhanced Broadleaf Control

Trimac Plus is an upgraded formula designed to control a broader spectrum of weeds, including hard-to-kill perennials and deep-rooted species. Thanks to the addition of Clopyralid, it is particularly effective against woody weeds, thistles, and fleabane.

Best For:

• Sites requiring control of broadleaf weeds

• Industrial areas, fence lines, and rights of way

• Areas with persistent perennial weeds

Active Ingredients:

• 400 g/kg Terbacil

• 18 g/kg Sulfometuron Methyl

• 341 g/kg Clopyralid (Disrupts plant cell growth)

Key Advantages:

• Strong residual control – keeps areas weed-free for months

• Controls a broader range of weeds, including deep-rooted perennials

• Ideal for use in combination with knockdown herbicides like Glyphosate

• Flexible application methods – use a boom spray or handgun

Application Tip:

• Use Trimac Plus where broadleaf weeds are a major concern, and add spray oil or organosilicone for improved penetration.

 

 

Trimac GR Herbicide – Granular Convenience for Forestry & Industrial Sites

Unlike Trimac and Trimac Plus, Trimac GR is a granular formulation, requiring no water mixing. It is ideal for forestry applications where a dry application is preferred. It provides excellent residual control, suppressing weeds before they emerge.

Best For:

• Forestry plantations (post-planting application)

• Bare soil treatments

• Granular herbicide users

Active Ingredients:

• 44 g/kg Terbacil

• 2 g/kg Sulfometuron Methyl

Key Advantages:

• No mixing required – applied as dry granules

• Best for post-planting forestry weed control

• Controls couch grass, windmill grass, and annual/perennial weeds

• Long-lasting soil residual activity

Application Tip:

• Apply Trimac GR to moist soil for best results and avoid runoff into sensitive areas.

 

 

Which Trimac Herbicide Should You Choose?

If you're unsure which product best suits your needs, use this quick guide:

 

Situation	Best Choice
Long-term weed control in industrial sites	Trimac
Broadleaf weed control in industrial & rights-of-way applications	Trimac Plus
Forestry plantations needing post-planting weed suppression	Trimac GR
Need a granular, easy-to-apply formulation?	Trimac GR
Looking for a broad-spectrum weed killer with enhanced residual action?	Trimac Plus
Need a cost-effective, high-strength herbicide?	Trimac

 

 

Final Thoughts

Choosing the right herbicide is essential for effective, long-term weed management. Whether you need Trimac for industrial sites, Trimac Plus for broadleaf weeds, or Trimac GR for forestry applications, each product offers powerful residual control suited to specific needs.

 

Need expert advice?

If you're still unsure which herbicide is best for your site, contact our team today for recommendations.