By Ron Townsend, M.S., technical services manager for Syngenta

Tank mixing pre-emergent herbicides with insecticides in lawn care applications offers multiple strategic advantages that benefit both lawn care operators and customers. This efficient practice:

• Streamlines operations by reducing the number of applications needed 
• Provides comprehensive pest control 
• Minimizes equipment wear and labor costs. 

By combining these products, lawn care operators can:

• Target both emerging weed populations and destructive insect pests in a single pass
• Maximize the use of fuel, time and resources

The synchronized application ensures:

• Both preventive weed control and insect management simultaneously 
• Reduced window of vulnerability for turf damage 
• Customers are provided with better value and reduced service calls 

This approach is particularly valuable during peak seasons when timing is critical for both pre-emergent activation and insect control, allowing for optimal product performance while maintaining a more profitable and efficient service schedule.

Barricade^® 4FL and Barricade 65WG herbicides are premier pre-emergent herbicides that deliver low-rate, season-long efficacy against more than 30 of the most troublesome weeds, including crabgrass, oxalis and spurge. Barricade is effective on grass weeds and small-seeded dicot weeds prior to germination. However, tank mixtures are required to control perennial dicot weeds and grasses plus weeds post-germination.

Phenoxy and pyridine-based herbicides are the most common products for post-emergent dicot weed control. Post-emergent grass weed control is more difficult because of turfgrass tolerances to herbicides. The most common lawn care mixture is a fertilizer component along with Barricade and a post-emergence dicot herbicide.

• For pre- and post-emergent crabgrass control — Tenacity^® herbicide can be tank mixed with Barricade on most lawns
• For sedges or grass weed control — Monument^® 75 WG or Manuscript^® herbicides can be added to the tank on bermudagrass and zoysiagrass lawns
• For season-long weed, grub, billbug and turf caterpillar control — Timing of a second Barricade application will coincide with a grub control application. Acelepryn^®  and Acelepryn Xtra insecticides can be applied in spring for season-long grub control. Ensure control by following the Grub, Billbug and Caterpillar Prevention Guarantee.
  
  

Acelepryn Xtra

Rate	Application Timing	Days of Control Guaranteed
10 fl. oz.	Apply as a preventive treatment	60-day caterpillar control
10 fl. oz.	Northern U.S.1: June-July	Season-long white grub control
15 fl. oz.	For white grub control, apply when adult beetles are active2 Northern U.S.: May – June Southern U.S.: April – May	Season-long white grub control + 90-day caterpillar control
20 fl. oz.	For white grub and billbug control, April-May3	Season-long white grub control  + 120-day caterpillar control  + Season-long control of billbugs

Notes:
¹Due to the longer growing season in the southern US, the 10 oz. rate of Acelepryn Xtra for white grub control are only guaranteed in the following Northern States - CO, CT, DE, DC, ID, IL, IN, IA, KS, KY, ME, MD, MA, MI, MN, MO, MT, NE, NH, NJ, NY, ND, OH, OR, PA, RI, SD, UT, VT, VA, WA, WV, WI, WY
²This application provides additive control of ants and suppression of mole crickets.
³This application provides additive control of: 

• Ants
• Late instar grub control (through second instar)
• Six weeks of chinch bug control
  • 12 weeks of Southern chinch bug
• And suppression of mole crickets

Acelepryn

Rate	Application Timing	Days of Control Guaranteed
4 fl. oz.	Apply as a preventive treatment	60-day caterpillar control
4 fl. oz. 2(ee)	Northern U.S.4: June-July	Season-long white grub control
8 fl. oz.	For white grub control, apply when adult beetles are active Northern U.S.: May – June Southern U.S.: April – May	Season-long white grub control + 90-day caterpillar control
12 fl. oz.	For billbug control, apply at first sign of adult activity to prevent larval development  April – May	Season-long billbug control  + Season-long white grub control + 120-day caterpillar control

Notes:

• No signal word
• ONLY diamide with no adverse effects on beneficial organisms such as honey bees*

​​​​​​​⁴Due to the longer growing season in the southern US, the 4 fl. oz. rate of Acelepryn for white grub control are only guaranteed in the following Northern States - CO, CT, DE, DC, ID, IL, IN, IA, KS, KY, ME, MD, MA, MI, MN, MO, MT, NE, NH, NJ, NY, ND, OH, OR, PA, RI, SD, UT, VT, VA, WA, WV, WI, WY

• Other components may include iron and tank rinsate contributing to a complex tank mixture
• Not only should the components be compatible, but they should also be able to be resuspended, because convenience may dictate the components are mixed the night before and agitation is restarted the next morning
• The best way to test for compatibility is a jar test — Mix components in approximate ratios in order of the recommendations on the label (see example below). If components are not compatible, add a compatibility agent. Additionally, let the components rest in the jar for several hours or overnight and see if mixture can be resuspended. Again, a compatibility agent can help resuspend the mixture.

Example mixing order:

1. Water (and rinsate or other wastewater)
2. Compatibility agent (if needed)
3. Barricade 65WG, Monument 75WG or other water-dispersible granule formulations (allow product to disperse before adding next product)
4. Acelepryn
5. Barricade 4FL, Tenacity or other flowable (FL)/suspension concentrate (SC) formulations
6. Ester or amine formulations of dicot herbicides, like Manuscript
7. Urea, iron or other soluble fertilizer, as well as additional water to fill the tank

​​​​​​​For information on small packaging sizes of Barricade, Tenacity and Acelepryn, visit GreenCastOnline.com/SmallPacks.


*Source: Jonathan L. Larson, Carl T. Redmond and Daniel A. Potter, SCI. September 2011.

Always refer to the product label for full use recommendations. 

​​​​​​© 2025 Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties and/or may have state-specific use requirements. Please check with your local extension service to ensure registration and proper use. Acelepryn^®, Barricade^®, Fusilade^®, GreenCast^®, Manuscript^®, Monument^®, Recognition^®, Tenacity^® and the Syngenta logo are trademarks of a Syngenta Group Company.