Beat the toughest weeds and soil-borne diseases with improved soil penetration and distribution of pesticides

ORO®-RZ helps improve pesticide effectiveness in hydrophobic soils.

Knocking out tough and resistant weeds and damaging soil pathogens requires getting your pesticides evenly spread throughout your soil. Missed areas lead to nutrient-stealing weed growth and disease that hurts your bottom line.

ORO-RZ soil adjuvant combined with pesticides has been proven a powerful, new tool for controlling resistant weeds and damaging soil pathogens by promoting even distribution and spreading of pesticides throughout soil, including hydrophobic soil, to dramatically improve effectiveness.

The ability of ORO-RZ to deliver superior performance of soil-applied pesticides offers you a better return on your pesticide investment through better control of pre-emergent weeds and soil-borne diseases.

Get more from every acre by getting more from your pesticides with ORO-RZ.

Get the most out of expert recommended pre-emergent weed control strategies with ORO-RZ soil adjuvant.

ORO-RZ dramatically improves pesticide and fertilizer performance by:

  • Distributing pre-emergent herbicides evenly to prevent gaps that would otherwise allow weed growth.
  • Surrounding vulnerable in-soil portion of crops with pesticides to protect them against infestation.
  • Eliminating hydrophobic soil dead spots by allowing spray solutions to penetrate areas that may otherwise repel them.

Improving Soil Health

ORO-RZ® adjuvant improves the efficacy of soil-applied pesticides and nutrients. When tank mixed with pre-emergent herbicides it improves soil hydraulic conductivity, even in hydroscopic soils, to move the herbicide solution into soil pore spaces to lay down a uniform barrier of herbicide protection. ORO-RZ, when applied with nutrients such as NANOCAL, distributes the application uniformly throughout the soil profile boosting efficient uptake by the root system.


Most state cooperative extension services now recommend a pre-emergent application strategy to control Roundup-resistant weeds. To make this strategy even more effective, you should add ORO-RZ to every pre-emergent application.

Hydrophobic soil areas left untreated can allow weed seeds to germinate, thus requiring a post-emergent application to control. A tank mix of ORO-RZ with a pre-emergent herbicide delivers a uniform soil treatment to provide even distribution, resulting in dramatically reduced weed growth.

ORO-RZ is the most advanced soil adjuvant for combating tough and Roundup-resistant weed growth, including broadleaf weeds like marestail. By delivering a uniform soil treatment of herbicide and providing even distribution, the ability of weed seeds to germinate is dramatically reduced. Improved weed control results are realized with a tank mix of ORO-RZ.

Broadleaf control on weeds in Alion trial

  • Marestail
  • Fleabane
  • Spotted Spurge
  • Redstem Filaree
  • Common Chickweed
  • Redmaids
  • Shepherd’s Purse
  • Annual Sow Thistle
  • Little Mallow
  • California Burclover
  • Redroot Pigweed


Soil-applied herbicides may not penetrate dense and hydrophobic pockets in soil, allowing weed seeds to germinate and grow. Mixed with ORO-RZ, herbicides infiltrate more thoroughly and penetrate pockets of denser soil delivering better control.



ORO-RZ improved the efficacy of Alion herbicide from 71% to 95% across a variety of late winter broadleaf weeds.

Soil-Borne Disease Control

Soil-borne pathogens can seriously reduce yield and crop quality. While soil applications of fungicides can help mitigate losses, soil condition can dramatically reduce their effectiveness. ORO-RZ has been scientifically developed to improve absorption, spreading and infiltration of fungicides in all soil types including hydrophobic soil. ORO-RZ mixed with fungicides has been shown to eliminate a higher percentage of soil-borne diseases including Rhizoctonia, Phytophera and others targeted with soil-applied treatments.

Potatoes: Economic Return per Acre for ORO-RZ (@ $7.94/cwt)
A 1 quart application of ORO-RZ results in a 15 to 1 Return on Investment