Active ingredient:
Trichoderma harzianum T-22
Common name:
Soil-dwelling fungus
Product category:
  • Prevents and controls soil borne diseases

  • Granules can be easily dispersed in water and applied via drench, drip-irrigation or spraying

  • Prevents and controls soil borne diseases

  • Granules can be easily dispersed in water and applied via drench, drip-irrigation or spraying

Use for

Use for

Trianum-P is a preventive biofungicide for control of plants diseases. Trichoderma harzianum Strain T-22 when applied grows onto plant roots as they develop and provides protection against plant root pathogens. Trianum-P can be used alone or in conjunction with certain fungicides.


Trichoderma harzianum T-22 provides protection against plant root pathogens including Pythium, Rhizoctonia, Fusarium, Cylindrocladium, and Thielaviopsis.


Trianum-P can be used in most crops.


Trianum-P is registered for sale in the following U.S. states and territories:

  • AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT NC, ND, NE, NH, NJ, NV, NY, OK, OH, OR, PA, SC, SD, TN, TX, VA, WA, WV
How it works

How it works

Mode of action

The mode of action of Trianum-P is based on the following mechanisms:

Competition for space
Trianum-P grows faster on the surface of the root than other soil-borne fungi. Other fungi get less chance to establish on the roots.

Competition for nutrients
Trianum-P takes away the source of nutrients that the pathogens need. The pathogens therefore have less chance to develop.

Parasitism of pathogens
Trianum-P grows around the mycelia of the pathogens. The cell walls of the pathogens break down and the pathogens die.

Product specifications

Product specifications

Pack size 500 gram and 5 kg bags with a cardboard outer casing.
Formulation Water dispersible granules (WG).
Concentration Contains at least 1.0 x 107 colony forming units per gram dry weight
Directions for use

Directions for use


  • Add 1 volume of Trianum-P to 5 volumes of water in a bucket
  • Mix thoroughly
  • Add the suspension to the required amount of water to obtain the final spray, drip or drench solution
  • Agitate continuously to maintain a homogeneous distribution of spores
  • Apply immediately. If not, keep refrigerated after mixing with water, but use latest on following day


Trianum-P can be applied via drench, drip-irrigation systems or by spraying onto the growing medium at the time of sowing. Apply Trianum-P as early as possible to the crop for optimal effect.

Application via drench or spray:

  • Trianum-P can be applied with any spraying or drenching equipment
  • After application clean the equipment by flushing thoroughly with water
  • Use sufficient solution to guarantee good penetration of the growing medium or the soil, but avoid run-off and excess drainage

Application via drip irrigation:

  • Spores in Trianum-P should reach the roots quickly. Inject Trianum-P after the sand filter and make sure that drip irrigation filters are clean (spores can attach themselves to organic material in filters)
  • To increase spore attachment to the roots, avoid run-off and excess drainage the first two days after application of the product. Trianum-P is not a systemic product and is therefore not taken up by the plant
  • Do not use disinfectants in drip irrigation systems from at least one day before until two days after the application of Trianum-P


  • The dosage of Trianum-P depends on the crop and should always be adjusted to the particular situation. Check the label to find the recommended dosage for each crop and situation
  • Consult a Koppert advisor or a recognized distributor of Koppert products for advice on the best strategy for your situation


Start application preventively at sowing or soon after planting of the crop.

Environmental conditions

Trianum-P performs well under different environmental conditions. Trichoderma harzianum T-22 grows in a wide temperature range (10-34°C/50-93°F), at a pH between 4 and 8, in many types of growing media.

Side effects

Pesticides can have (in)direct effects on biological solutions. Find out which pesticides have side effects on this product.

Go to side effects database
Product handling

Product handling

Storage time after receipt

See package for expiry date.

Storage temperature


Storage conditions

Keep away from direct sunlight.


"The general conditions of Koppert (Koppert B.V. and/or of its affiliated companies) apply. Only use products that are permitted in your country/state and crop. Always comply with the conditions specified in local product registrations. Koppert cannot be held liable for unauthorized use. Koppert is not liable for any loss of quality if the product is stored for longer than recommended and/or under incorrect conditions."