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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.

PVent’s active ingredient, Gliocladium catenulatum Strain J1446, was 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’s 93% active ingredient makes it 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 has a prolonged effectiveness and will provide a defense against future pathogens for up to four weeks.

PVent controls soil-borne plant pathogens, foliar pathogens and is labelled for use on greenhouse/ nursery crops and agricultural crops grown indoors. PVent can be applied by soil substrate or hydroponic solution incorporation, drench or foliar spray. PVent, when partnered with BioSafe Systems’ PAA+ line of products, will provide a broad-spectrum control of economically destructive plant diseases.

PVent has a 4-hour REI, 0-day pre-harvest interval and a caution label making it an integral tool for producers.

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. secretes 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 through several methods: Chemigation, Cutting Dip, Drench, Foliar Spray, Fogging, Hydroponic. To obtain the most impressive results, apply PVent as early as possible in the season. PVent is a preventative fungicide, so it should be utilized on a regular basis.

PVent Application Rates

Chemigation0.16 – 0.33 OZ per 1,000 SQ. FT.
Cutting Dip0.1 OZ per 1 gallon
Drench0.33 OZ per 2.5 gallons
Foliar Spray3.3 – 6.6 OZ per 100 gallons
Fogging0.14 OZ per gallon. 0.6 – 1 gallon solution per 10,000 SQ. FT.
HydroponicRockwool: 0.7 – 0.9 OZ per 1,000 Plants. 0.013 – 0.016 OZ per 100 SQ. FT.

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

Effective Against:

  • Alternaria

  • Anthracnose

  • Bipolaris

  • Botrytis

  • Cladosporium

  • Didymella

  • Fusarium

  • Helminthosporium

  • Monilia

  • Mycosphaerella

  • Penicillium

  • Phytophthora

  • Powdery mildew

  • Pythium

  • Rhizoctonia

  • Sclerotinia

  • Verticillium

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.