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Frequently Asked Questions



Q: Why is your product not available in California?

A: Each State has an approval process for new pesticide products. The application for California was made in February of 2014. Approval is expected in the Fall of 2015.


Q: What is the use level?

A: We recommend applying Zonix Biofungicide™ at 500 ppm. The labeled application rates are between 300 ppm and 500 ppm. * 300 ppm: 1/2 ounce of Zonix Biofungicide™ per gallon of spray * 500 ppm: 3/4 ounces of Zonix Biofungicide™ per gallon of spray


Q: How many gallons should be applied per acre?

A: This question requires some explanation. Zonix Biofungicide™ is also a biosurfactant. So when a grower uses the product they have two benefits to consider. One is disease control and the other is functionality. To understand functionality some important factors about its biosurfactant properties need to be considered:

  1. Spray quality
  2. Spray performance
  3. Spray retention factors on crop
  4. Physicochemical properties of spray mixture
  5. Weather or microclimate conditions
  6. Type of plant surface - Hairy vs. Waxy

Spraying a crop it is like spray painting a car. Automobile manufactures have perfected the job of spraying a surface for perfect coverage. Why, because paint manufactures have done the research to understand the above variables and how they apply to an automobile. Remember they want to control cost. Over spray and runoff cost money. Unfortunately most growers do not have access to state equipment that could help control the cost of application. Surfactants aid in droplet size, spread, and coverage. They help a droplet penetrate the hairy surface of a leaf. When you consider that the application of spray chemicals is a costly input for a grower. The understanding and implementation of spraying science is time well invested. But the question is how much should be applied to an acre? This is the same as walking into a paint store and asking for enough paint to paint a house. The first questions from the dealer will be: How big is the house? What is the surface? How much surface needs to be covered? The questions that can be asked for a crop are:

  1. Diversity of the Crop and its growth habits
  2. Density of Crop in the Field
  3. Shape and size of the Crop canopy

The amount of spray you need depends on the surface that needs to be covered. If you are growing turf then you know the square footage that needs to be used to cover an acre (43,560 ft_). But that is not the case for an annual crop. Yes the initial square footage is an acre but as the crop grows the square footage increases as the plant grows. Remember the objective is to cover the crop, both sides of the leaves and the stems. As that plant grows the surface area, the number of leaves and length of stems increase dramatically. This is surface area that must be covered with the Active ingredient. If a recommended rate is 40 gallons per acre and the actual surface area of the plant canopy is 130,680 ft_ you are in effect reducing the Active Ingredient needed to control the disease by 1/3. Think about it. You start by applying the recommended rate and as the crop grows the amount required to control the disease increases with the size of the crop canopy. If you apply the recommended rate at each application interval throughout the growth cycle, then you will be applying less active ingredient at the same time the disease pressure is increasing. As with most OMRI approved products, Zonix Biofungicide™ should be used as a preventative to control the Zoosporic pathogens associated with Downy Mildew, Phytophtera (Late-Blight) and Pythium.


Q: What is the best method of application?

A: Zonix Biofungicide™ has been approved for use as a spray, fog or drench and for use in Chemigation. It can be used in field, greenhouses and on turf and ornamentals and has a re-entry interval of 4 hours.


Q: How often should it be applied?

A: Starting at planting apply to soil or planting medium. This will destroy any zoospores that may have over-wintered or introduced through external soil amendment. Zonix Biofungicide™ should then be applied weekly thru harvest to both the top an underside of the leaves Reapply following heavy rains. The biosurfactant properties of Zonix Biofungicide™ can help reduce water stress and aid in absorption of nutrients.


Q: When is the best time to apply?

A: Zonix Biofungicide™ should be used as a preventative well before the traditional time period for the appearance of the disease. Many Zoosporic diseases can overwinter and slowly build the infection population during the growing season. Starting a treatment program early will help reduce the level of Zoospores that are in the plants environment. Since it has a Zero pre-harvest interval it can be applied the day of harvest. It also has an exemption from tolerance limits for food so harvest does not have to be delayed.


Q: Does this product eliminate the need for an adjuvant (surfactant)?

A: Zonix Biofungicide™ was first approved by EPA as Rhamnolipid Biosurfactant. It is the biosurfactant properties that destroy the membrane of Zoosporic fungal diseases. Research conducted at the USDA research facility in Wooster, IL has shown it to be a highly effective biosurfactant. The use of additional adjuvant (surfactant) is not required.