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    PRB9™ 0-3-3 Application Rate and Timing in Table Grapes

    2023

    4%

    Increase in weight of 50 Berries

    11%

    Decrease in small berries

    7%

    Increase in large berries

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    Objective

    Evaluate the effects of the timing and rate of PRB9™ applications on the yield and quality of Table Grapes.

    Overview

    • Plants in the field can be exposed to many kinds of abiotic stress such as heat, drought and salinity. These stresses can inhibit the normal growth and activity of a plant leading to decreases in yield and quality of a crop.
    • Osmoregulants are substances produced by plants that assist plants in tolerating environmental stresses by stabilizing proteins and enzymes and ensuring proper water flow into the plant cells during stress events.
    • PRB9 contains an osmolyte compound which increases resistance to abiotic stress and optimizes conditions for improved crop yield and plant performance.

    Trial Details

    Crop: Table Grapes

    Year: 2023

    Location: Central California

    Data Source: Field study was conducted by third-party, independent researcher

    Treatments:
    1. Grower Standard
    2. PRB9 applied at 32 oz/ac either three times
    or four times during the growing season
    3. PRB9 applied either four 21 oz/ac applications or two 42 oz/ac applications
    Cultivar: Krissy

    Cropping Conditions: Trial conformed to local cropping practices. Established vines with conventional tillage

    Application Rate: 21, 32 and 42 fl oz/A

    Application Method: Foliar applications made with a Stihl mist blower applied at 100 gal/A

    Application Timing: Applications at pre-bloom, petal fall, berry sizing and verasion

    Results

    Summary

    • PRB9 increased yield, berry weight and reduced the percentage of small berries under all rates and application combinations.
    • PRB9 applied twice, at pre-bloom and berry sizing, was the most effective treatment with the highest yields and the biggest shift in berry size from small to large size berries.
    • Applications of PRB9 did appear to delay fruit development with a higher percentage of green fruit and lower Brix levels. However a slight delay in harvest time should alleviate those issues.
    • The trial experienced heavy rain in August due to a rare hurricane event. The rain caused swelling in cracking in the developing fruit which led to a lot of rot and lower yields than is typical for the region

    Trial Data Map

    See where our biologicals are working and where they are not. Get the transparent data you need to put PowerCoat® and BioPath® to work for you.

    Trial Data