TARBIS Foliar Treatment

Maximise your biological nutrient availability

Return on investment 5:1
Chance of a return on investment
Average yield increase
(45 trials)
(1st,2nd and 3rd wheats)

Based on our industry leading Seed treatment TIROS, TARBIS is a foliar option comprised of a unique combination of endophyte strains which enable all crops to fix nitrogen, sequester phosphorous, potassium and zinc, and better withstand drought stress.

TARBIS also improves yield due to better nutrient use efficiency and creates more robust crops which can handle abiotic stress. Its peer reviewed, independently trialled data proves treated crops require less artificial fertiliser, which is good news for the environment as well as a farmer’s bottom line.

  • Increase root mass

  • Increase shoot mass

  • Maximise crop development

  • Enhance nutrient uptake throughout the season to maximise crop growth

  • Reduce abiotic stress

  • Optimise green leaf area

  • Performs independent of external temperatures

  • Maximise yield – average yield response 0.55 t/ha over equivalent farm standard

  • Excellent ROI 8:1 with wheat valued at £125/tonne

  • Bacterial endophyte strains supplied with our bio-extender for enhanced colonisation, increased safety and crop stimulation

  • Liquid foliar treatment

  • 8 litres equivalent to 8 hectares (1 litre per tonne application rate)

  • Active ingredient: > 108 CFU/g bacterial endophyte (CFU: colony forming unit. Unit of measure for living microorganisms able to multiply).

  • Safety: fully genome mapped guarantees no mammalian toxicity.

  • Storage: original material is freeze dried giving it a minimum 24 months shelf life.

Plants have had associations with micro-organisms since they first appeared on earth. This biological biome confers many properties to the plant – enhanced nutrient availability, abiotic stress support, in-planta detoxification and siderophore production.

The endophytes from the University of Washington have been specially selected to fix atmospheric nitrogen and sequester other nutrients from the soil. They live within the whole plant from root to shoots.
Endophytes can be isolated from poplar, grown in culture, and used to re-inoculate plants

Crop Dose Application Timing Comments
Oil Seed Rape
Cover Crops
1.0 L / Ha Applied to the foliage Apply with a Unium “prebiotic” seed support product (Tarbis Bio) in sufficient water to give good coverage

For other crops please contact Unium Bioscience for application details.
Other crops tested include : soya, sugar beet, broccoli, kale, tomatoes, beetroot, peppers, lettuce, courgette, soft fruit, fruit trees, forestry, hardy nursery stock, turf.

TARBIS has been tested alongside the major crop protection materials with no loss of active ingredient or effectiveness.

Do not apply with in a spray solution outside the pH range of 5 – 8.5.

The Corn of the Future Is Hundreds of Years Old and Makes Its Own Mucus Jason Daley, smithsonian.com, August 10, 2018

Variable Nitrogen Fixation in Wild PopulusProfessor Sharon Doty

Bacteria in branches naturally fertilise treesMichelle Ma

Endophytes Increased Fruit Quality with Higher Soluble Sugar Production in Honeycrisp Apple (Malus pumila)
Hyungmin Rho, Victor Van Epps, Soo-Hyung Kim and Sharon L. Doty

Sharon L Doty Lab Publications

Endophyte-Promoted Phosphorus Solubilization in Populus
Tamas Varga 1*, Kim K. Hixson 1, Amir H. Ahkami 1, Andrew W. Sher 2, Morgan E. Barnes 3,
Rosalie K. Chu 1, Anil K. Battu 1, Carrie D. Nicora 4, Tanya E. Winkler 4, Loren R. Reno 1,
Sirine C. Fakra 5, Olga Antipova 6, Dilworth Y. Parkinson 5, Jackson R. Hall 2 and
Sharon L. Doty 2


Professor Sharon Doty

University of Washington


Intrinsyx Bio

located at
NASA Ames Research Park

TARBIS is approved for use in organic systems. No: UKE1357

OF&G Organic Systems Logo


  • Safety – genome mapped for all strains

  • Easy to use

  • Convenient dose rate

  • Fully tank mixable

  • Affordable to the grower

  • Reliable robust results