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Asperello T34 Biocontrol by BioBest
Asperello T34 Biocontrol

Asperello T34 Biocontrol is an amazing organic biological fungicide and bactericide that uses the dried spores of the beneficial fungus Trichoderma asperellum , strain T34 to provide plant protection, boost overall plant growth, and improve plant defenses against plant diseases and abiotic stresses. This organic wettable powder is meant to be used preventatively, and when applied as such it functions through multiple modes of action. It is able to quickly colonize both the growing media and the plant roots. This creates a barrier against pathogens and causes competition for space and nutrients. Asperello T34 Biocontrol will gain control of the area by out-competing the pathogens, but it will also have a direct effect on them through parasitism and/or antibiosis and induced plant resistance responses. As the pathogens are driven from the area, the plant roots grow vigorously to fill the space, leading to dynamic plant growth.

Multiple modes of action mean that Asperello T34 Biocontrol will not trigger fungicide resistance.


  • Facilitates the absorption of several mineral elements, which spurs healthy growth, by germinating and growing around the roots and in a wide range of soils and substrates.
  • Becomes active when the soil temperature is at least 50°F and will develop in soil temperatures of 59-95°F, but its optimal growth temperature is 68-86°F.
  • Develops in soil pH levels of 4-9.
  • Mixes easily and thoroughly in water.
  • Reduces the number of dormant structures (chlamydospores, sclerotia) of several fungal species produced throughout the growing season and, when applied prior to planting, reduces the inoculums of previous seasons.
  • High spore count for rapid root colonization and faster protection.
  • Has a 24-month shelf life when stored as directed (at 40°F).
  • Can be applied via the following methods: Foliar, substrate mix, as a seed treatment, cutting and bare root, broadcast, floor (basin), in-furrow, greenhouse and nursery drench, and applications made via chemigation systems.
  • Can be used on field crops, rice, berries, vegetables, herbs and spices, mints, citrus, olives, pomegranates, pome fruits, stone fruits, tree nuts, tropical and subtropical fruits, small vining fruits, hops, hemp, muscadines, ornamental roots/tubers/bulbs/corms, flowers, bedding plants, ornamentals, trees, and turf/turf grass.


This Product Controls These Pests or Diseases:

Botrytis cinerea (grey mold), Burkholderia glumae (bacterial panicle blight, bacterial grain rot), Cephalosporium maydis (late wilt of corn), Didymella bryoniae (gummy stem blight), Fusarium spp. ( Fusarium ), Gibberella fujikuroi (Bakanae and foot rot in rice), Leptosphaeria lindquistii (black stem in sunflowers), Macrophomina phaseolina (root rot), Magnaporthe oryzae (rice blast fungus), Mycosphaerella spp. (black Sigatoka and Septoria leaf blotch), Phytophthora spp. (crown rot), Pythium spp. ( Damping Off ), Ralstonia solanacearum (bacterial wilt), Rhizoctonia spp. ( Damping Off ), Sclerotinia spp. (soft rot) and Sclerotium spp. (diverse rots).



Warning & Toxicities: Keep out of reach of children. CAUTION: Harmful if swallowed, absorbed through skin or if inhaled. Causes moderate eye irritation. Avoid breathing spray mist. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco, or using the toilet. Remove and wash contaminated clothing before reuse. Prolonged or frequently repeated skin contact may cause allergic reactions in some individuals.

Shelf Life: Has a 24-month shelf life when stored as directed (at 40°F).

Active Ingredients/Guaranteed Analysis:

Trichoderma asperellum, strain T34*..............12.00%
OTHER INGREDIENTS:................................88.00%
TOTAL: ........................................................100.00%
*Contains 3 x 10 11 colony forming units per Kg of product.


OMRI Certified
Product Details
Recommended Interval
7 - 10 days
Trichoderma asperellum, strain T34
  • Asperello T34 Biocontrol Product Label
  • Asperello T34 Biocontrol Product Label (CA)
  • Asperello T34 Biocontrol SDS
Use & Instructions



  • Use to protect against labeled soil-borne and foliar diseases by applying early in the growing season or growing cycle prior to infection by disease. Foliar diseases can also be controlled when the first symptoms appear or when environmental conditions are favorable to disease.
  • Can be applied via the following methods: Foliar, substrate mix, as a seed treatment, cutting and bare root, broadcast, floor (basin), in-furrow, greenhouse and nursery drench, and applications made via chemigation systems.




  • Do not tank mix with other pesticides.
  • Do not apply chemical fungicides three days prior to and after application.
  • Water disinfectants may affect the efficacy of this product.
  • Use 7-10 days after soil or substrate sterilization, fumigation, solarization or bio-fumigation, when the sterilizing agent or fumigant has dissipated.




  • DO NOT apply to mushrooms.
  • DO NOT use treated seed for food or feed purposes or process for oil. Treat only those seeds needed for immediate use, minimizing the interval between treatment and planting.
  • DO NOT store excess treated seeds beyond planting time.




  • Overall Specifications: Start the application of Asperello T34 Biocontrol at plant propagation (seedlings, cuttings and bare-rooted) to obtain optimal effect. Continue to apply throughout the crop cycle in order to maintain an appropriate level of antagonistic fungus population, especially before periods of maximum susceptibility, after plant stress during which plants might be weakened, and according to disease pressure.
  • Equipment Clean Out: Thoroughly clean application equipment before use so that no traces of other products (pesticides, fertilizers, disinfectants) remain. Wash application equipment thoroughly after use.
  • Dilution Information: Dissolve the needed amount of Asperello T34 Biocontrol in a small amount of water and stir to obtain good product dispersion. Add this suspension to the tank, with the total volume of water necessary to treat the soil/substrate or the plants, stirring continuously to ensure a homogeneous application of the product.
  • For Soil/Substrate Applications: Includes broadcast, floor (basin), in-furrow, border chemigation, chemigation and greenhouse/nursery drench) applications: When Asperello T34 Biocontrol is applied via irrigation, make sure that the product reaches the roots. Minimize leaching to help get a good installation around the roots but ensure that no residual product remains in the irrigation system.




Storage: Do not contaminate water, food or feed by storage or disposal. Store in original container in a cool dry place. When kept at 40°F (4°C), the viability of the product provides effective rates for up to 24 months.

Diseases & Pests Controlled
  • Botrytis Cinerea
  • Burkholderia Glumae Bacterial Panicle Blight
  • Bacterial Grain Rot
  • Cephalosporium Maydis
  • Didymella Bryoniae
  • Fusarium Spp
  • Gibberella Fujikuroi
  • Leptosphaeria Lindquistii
  • Macrophomina Phaseolina
  • Magnaporthe Oryzae
  • Phytophthora Spp
  • Pythium Spp
  • Ralstonia Solanacearum
  • Rhizoctonia Spp
  • Sclerotinia Spp
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