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PFR-97 20% WDG Microbial Insecticide/Miticide

PFR-97 20% WDG contains a naturally occurring fungus that controls some of agriculture’s most devastating pests, including whitefly, aphid, thrips and spider mites.

Vegetables WEST article, July/August 2014 Read the latest article from Vegetables WEST, "Strawberry Growers Happy with Biological Material for Spider mites".

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PFR-97 is for use against the following pests:

  • Aphid
  • Citrus psyllid
  • Spider mite
  • Thrips
  • Whitefly

PFR-97 20% WDG can be used with the following crops:

Pomes and stone fruits, citrus, grapes, tree nuts, strawberries, leafy vegetables, melons, cucurbits, herbs, spices, and beans.

For more information, please consult the product label.

PFR-97 20% WDG Applications

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Active Ingredient: Paecilomyces fumosoroseus

Safety: Compatible with releases of beneficial and pollinator insects and other Integrated Pest Management practices

Rates: 14 to 28 oz. per 100 gallons of water (see label)

Spray Interval: 7 days

Re-entry Interval: 0 hours

Mode of Action:

Paecilomyces fumosoroseus, the active ingredient in PFR-97 20% WDG, is a naturally occurring fungus that infects several insect pests, including whitefly, aphid, thrips and spider mites. Under proper environmental conditions, spores of the fungus attach to and penetrate the cuticle of the insect pest. The fungus grows inside the insect causing its death. The fungus then emerges from the dead insect to release more spores to infect other insects.


PFR-97 20% WDG is most effective when it is applied before or at the first sign of insect presence. Because PFR-97 20% WDG is a biological control and efficacy occurs over several days, initiate applications before the pest populations reach a crisis level. Monitoring of pest pressure is critical to the effective use of PFR-97 20% WDG.

PFR-97 20% WDG can be applied with other insecticides. Do not tank mix PFR-97 20% WDG7 with any fungicides, or use a stand-alone fungicide for five days after the application of PFR-97 20% WDG.

Application Rate (see product label)

Low Volume Application (see product label)


Best results will be achieved when applying PFR-97 20% WDG at least once per week, for two to three consecutive weeks.

Environmental Conditions:

Applications are best made in late evening or early morning when insects are sedentary and temperatures are moderate and humidity is high. Cloudy, rainy days are optimal times to apply PFR-97 20% WDG.

Storage: Keep product refrigerated at approximately 40 to 50 degrees F. in a dry place.

Organic Crops

NOP Approved:

This product is approved for organic production by the National Organic Program (NOP), a marketing program housed within the United States Department of Agriculture (USDA) Agricultural Marketing Service, the agency that sets marketing standards. The NOP mission is to develop and implement national standards that govern the marketing of agricultural products as organically produced, to facilitate commerce in fresh and processed food that is organically produced, and to assure consumers that such products meet consistent standards.

OMRI Listed®:

This product is OMRI Listed, therefore it is determined by the Organic Materials Review Institute (OMRI) to be suitable for use in certified organic production.

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