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PVent Biofungicide: A Novel Biofungicide for Control of Soil and Foliar Pathogens

PVent Biofungicide is an enhancement in microbial fungicide technology, providing growers with an easy-to-use, versatile IPM tool. This innovative development was spearheaded through a strategic partnership between two family-owned businesses: BioSafe Systems and Lallemand Plant Care.

BioSafe’s Sustainable Soils Program combines decades of experience and trust in fumigation practices to drive innovation in biorational and sustainable crop protection solutions. The strategic partnership between BioSafe and Lallemand, built off collective expertise, makes PVent one of the most concentrated EPA-registered biofungicides in its category. Powered by three modes of action, PVent is biologically programmed to rapidly colonize its host environment to defend against, attack and destroy even the most resilient plant pathogens.

PVent’s active ingredient is a 93% Gliocladium catenulatum Strain J1446, originally isolated from natural Finnish soils. The J1446 Strain includes some unique adaptation traits, including its enhanced ability to thrive and reproduce across broad temperature and humidity ranges. PVent’s G. catenulatum Strain J1446 was isolated and researched extensively due to its natural symbiotic relationship with the plant rhizosphere, the stem and foliar surfaces, and most importantly its versatility in an IPM program – this is due to an enzyme secreted by G. catenulatum, specifically targeting pathogenic fungi.

PVent is formulated into a wettable granule (WG) that can be readily dispersed, mixed and applied through multiple practices. It can be applied through nurse tank, direct chemigation into drip/trickle systems, spot-drench or directed spray treatments, traditional foliar sprays, overhead chemigation. multi-market label for field and covered production.  With its multi-market label for field and covered production, this broad-labeled biofungicide was engineered, formulated and trialed by universities and extension offices to provide growers with effective rates that can be adjusted based on pathogen incidence, severity and more.

How does PVent eradicate fungal pathogens while also aiding to prevent reinfection?

PVent’s consistent results due to multiple modes of action.

PVent’s G. catenulatum Strain J1446 was isolated and researched due to its unique, symbiotic relationship in plant rhizospheres and root zones, as well as plant foliage.  When evaluated on high-value specialty crops it was observed that PVent’s Strain J1446 had a unique ability to provide two critical actions for pathogen kill and prevention:

  1. secrete enzymes that break-down root rot pathogens
  2. rapidly colonizing the rhizosphere, around the roots and with new growth providing 3 to 4 weeks of highly populated prevention

At the same time, PVent rapidly colonizes the rhizosphere, root zone and all new growth, providing 3 to 4 weeks of highly populated prevention. G. catenulatum feeds on pathogenic fungi to aggressively reproduce on the treated surface.  PVent not only consumes and eradicates pathogen cells, it also promotes induced systemic resistance (ISR) properties in existing plants by colonizing root and foliar surfaces to control future pathogen attacks. The fungicidal properties of PVent are increasingly effective when used in timed conjunction with other bactericides/fungicides or as part of a broader IPM program.

How Should PVent be used?

PVent can be applied in four ways—foliar spray, field chemigation, drench or fogging. To obtain the most impressive results, apply PVent as early as possible in the season. PVent is a preventative fungicide, so it should be used early and often to prevent soil and foliar diseases.

PVent Application Rates

Foliar Spray0.33%/5 gallons water

Repeat every 7 to 14 days, depending on disease pressure

Field Chemigation or Drench0.16%/100 sq. ft. drip irrigation lines

Refer to chemigation use instruction on product label for more information.

Fogging0.016 oz./100 sq. ft. with a minimum water volume of 0.005 gallons per 100 sq. ft.

** Always read and follow label instructions. This chart only provides a guideline for each application type.

Effective Against:

  • Powdery Mildew

  • Alternaria

  • Botrytis

  • Fusarium

  • Phytophthora

  • Verticillium

  • Rhizoctonia

  • Anthracnose

The PVent Story

The history of PVent, an innovative biological fungicide, dates by to 1989 when the active ingredient, Gliocladium catenulatum Strain J1446, was isolated from Finnish field soil. The Agricultural Research Center of Finland screened 1,765 fungal isolates as a part of an inter-Nordic project. Originally, the objective was to find an effective biological control method for Fusarium culmorum in wheat.

Gliocladium catenulatum J1446 proved to be the most effective strain against several fungal plant pathogens, especially root pathogens Pythium and Rhizoctonia, as well as some foliar diseases such as Botrytis (grey mold) and Didymella (black stem rot). Strain J1446 performed best in nearly every test. The PVent strain also proved to have biostimulating properties, showing improved plant growth and health even when no apparent disease was present.

The PVent production process was developed by the biocontrols team of the former Kemira Agro Oy in Finland. The biocontrol unit of Kemira Agro Oy later became Verdera Oy, which is now part of Lallemand Plant Care. Several of the original team members who originally worked on PVent are still part of Lallemand Plant Care; Pekka Seiskari, Marja-Leena Lahdenperä and Marina Brandtberg.

The first product approval of PVent was granted in Finland in 1998, and the product was launched to the market the same year. Currently, PVent has a biopesticide registration in 18 countries, including the United States.