O1-YS™ Chitosan

O1-YS™ - The Organic Adjuvant

O1-YS™ is a uniquely formulated all-natural adjuvant proven to greatly increase the efficacy of nematicides, fungicides, fertilizers, herbicides, insecticides, and nutritional sprays. The synergistic blend of principal functioning agents featuring the combined properties of a superior agricultural, soil wetting agent, and nutrient enhancer to solubilize and transport nutrients benefiting the growth and development of all plants.


  • Improves the health and vigor of your plants!

  • Extends the growing season of your crops!

  • Increases the coverage of your spray agent!

  • Decreases transpiration loss up to 50%!

When used with an IPM

(Integrated Pest Management program)

  • Improves the performance of any IPM constituent

  • Boosts the efficacy of your conventional IPM program

  • Upgrades the wetting and sticking ability to the plant

  • Speeds the uptake and utilization of your IPM program

What is O1-YS™?

O1-YS™ is a unique synergistic blend of principal functioning agents featuring the combined properties of a superior agricultural spreader and sticker. It enhances the activity and performance of pesticides and foliar nutrients. With foliar applications, the superior wetting of O1-YS™ results in a more uniform distribution of material which increases the retention and absorption of sprays by reducing surface tension of the spray droplets. When applied to the soil, O1-YS™ improves wetting of hydrophobic soils by increasing water penetration into the soil matrix.

O1-YS™ can be applied to all crops including, fruits and vegetables, field and row crops, turf, fruit trees, nut trees, ornamental trees, vines shrubs and flowers and containerized plants. O1-YS™ is not designed for aquatic use.

OMRI Listed®

The OMRI Listed® Seal assures organic operators that O1-YS™ has passed OMRI expert review for use as an input for organic production and is compliant with certified organic production. O1-YS™ is an "input product". It can be used to grow, or produce organic foods, feed, or fibers including substances such as fertilizers, pesticides, and other materials used on the farm.

O1-YS™ appears on the OMRI Products List®.

Advantages of Chitosan and Yucca

Advantages of Chitosan and Yucca

Our raw ingredient, chitosan, is Prop 65 compliant. It is a natural cationic polymer primarily derived from shellfish. Chitosan’s cationic feature brings excellent adjuvant sticker qualities to this formulation through its ability to chelate organic compounds and minerals. Your result is more healthy plants with increased vitality, vigor and yield.

Yucca is a staple ingredient in the food industry and is also used to prepare natural shampoos, cosmetics and liquid soaps. The same properties that make it safe and effective for these products, combined with its excellent wetting characteristics, make yucca a superior agricultural surfactant. Its biosustainabilty supports Organisan Corporation's mission to provide green and environmentally friendly products to the industry.

Start Reaping Your Benefits Today!

Row Crops & Vegetables

The use of O1-YS™ in row crop production when used as an adjuvant with your existing treatment protocols provides several advantages. Harvest results showed a more than 40% increase in yield from the O1-YS™ treated rows over rows receiving conventional treatments. It is known to chelate nutrients and minerals and to enhance the plants health and vigor.


O1-YS™ may be used as an additive in your surface coating protocol on fresh fruits and vegetables to decrease the transpiration loss. Yucca products have GRAS status, making them FDA-approved for use in humans.


In viticulture, addition of O1-YS™ to IPM protocols leads to much greater yields and significantly healthier vines.

- Ready to order? -

Select one of the options below to start growing healthier plants!

Local Pickup

By appointment only.

Schedule a Delivery

Order online to schedule a delivery right to your door!