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Patent pending technology

PENTRA-BARK® is a unique patent pending surfactant application for treatment of trees and plants.PENTRA-BARK® has been specifically designed for use on herbaceous woody plant surfaces with fungicides, insecticides, plant growth regulators and micro-nutrients.

PENTRA-BARK’s new technology facilitates “non-invasive treatment” of trees and woody plants with systemic pesticides/nutrients. Conventional treatment methods utilizing labor intensive drilling, injection of root flare, and high pressure deep root injection of pesticides for soil saturation is eliminated. The liability of chemical trespass with foliar application is also eliminated.

Pentra Bark Label

Pentra Bark SDS

Pentra Bark TDS

Pentra Bark Citrus Spec Sheet



Patent pending technology

How does PENTRA-BARK work?

All woody plants have microscopic openings in the exterior protective bark periderm layer called lenticels. These lenticels are functionally used for plant transpiration and pressure regulation.

Lenticels connect directly to the plant’s annual spiral openings or vascular metabolic transport system contained in the plant’s cambial phelloderm.

When PENTRA-BARK is applied to the woody bark periderm in combination with systemic pesticides it opens the lenticels and enables movement through the lenticels into the plant’s vascular transport system.


In the trial below, an inert dye was mixed with 3 oz. of PENTRA-BARK per gallon of water and applied onto the tree trunk with the basal bark application method.

The tree was dissected and examined 7 days after application. The inert dye had penetrated into the center of the tree within 7 days and the inert dye had also been transported throughout the tree’s vascular system as evidenced by the dye being found 24 feet up into the canopy of the tree. Translocation of systemic pesticides primarily occurs in the cambial zone.

How much spray solution is required to treat a tree generally with the basal bark application method, applied from ground level to 5 feet up the trunk circumference?

How much PENTRA-BARK should I use per gallon of spray?

PENTRA-BARK should be used at 1% of spray volume solution
or 3 oz. per gallon of spray solution

Approximate solution volume required for treatment per inch of DBH

DBH Smooth Bark Rough Bark
6” <1 pint 1 pint
12” 1 quart 1-1/2 quarts
18” 2 quart 2-1/2 quarts
24” 2-1/2 quarts 3 quarts

Apply solution until saturation run-off occurs (DBH= diameter measured at 4.5 feet from ground level) Rough Bark trees require more solution for treatment

Additional information

Weight 30 lbs
Dimensions 12 × 8 × 12 in

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