Pentra - Bark

Pentra - Bark

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Product Overview

Pentra-Bark is a bark penetrating surfactant designed for surface treatments of trees and plants. It is designed for fast, uniform absorption and distribution of spray on stem and leaf surfaces. It may be used with most pesticides and fertilizer to improve translocation through lenticels on the bark. When applied to the woody bark, the lenticels open and enables movement of the product into the plant’s vascular transport system. It has been proven effective with various pesticides and no drift or chemical trespass. It greatly reduces applicator exposure and is a non-invasive treatment with no long term injury to treated plants. Apply to the bark with no need to treat surrounding soil. Use on herbaceous woody plant surfaces with insecticides, fungicides, plant growth regulators and micro-nutrients. This product may be used in agriculture, horticulture, industrial and forestry applications. This product comes in a quart size bottle.

Features and Specs

Active Ingredient Alkylphenol ethoxylate, polysiloxane polyether copolymer, propylene glycol - 99.8%
For use in Agriculture, horticulture, industrial and forestry applications.
Pet safe Yes, if used as directed on label.
Shipping Weight 2.00 lbs
Manufacturer Brandt Consolidated (Mfg. Number: 772118)
EPA Registration 83416-50001



PENTRA-BARK is a nonionic organosilicone wetting agent designed for use in certain agricultural and horticultural uses where a nonionic surfactant is recommended. Suggested Rates for the use with various categories of chemicals are as follows:

Chemical Group                                                                Ounces of PENTRA-BARK to add per 100 gal. of spray mixture

Insecticides, Miticides & Fungicides . . . . . . . . . . . . . . . . . . . 6 to 32 fl. oz.

Herbicides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 to 64 fl. oz.

Glyphosate formulations without added surfactants  . . . . . 12 to 64 fl. oz.

Defoliants & Desiccants . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 to 64 fl. oz.

Fertilizers & Micronutrients . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 32 fl. oz.

NOTE: Carefully read and follow the specific directions contained on the label of the chemical used. Before adding PENTRA-BARK to spray tank mixes or before using with a pesticide or fertilizer where a nonionic adjuvant is not specifically recommended but not prohibited by the manufacturer, the user or application advisor must have experience with the combination or must have conducted a phytotoxicity trial of their own. For local recommendations, consult a competent agricultural authority.

Basal Bark Treatment: PENTRA-BARK is specially designed to aid penetration of fertilizers, nutrients, insecticides, fungicides, and herbicides through the bark. Use 1 1/2% to 2 1/2% PENTRA-BARK by volume of spray solution. Consult pesticide label for specific use rates and application method, or contact your Quest Representative.

Aerial Application: When applying aerially, follow pesticide label directions including minimum water volume per acre. Do not substitute PENTRABARK for water required by the pesticide label.

Irrigation Injection: Applications of PENTRA-BARK through irrigation systems are possible provided the recommended use rates and dilutions are maintained and local, state, and federal guidelines are followed.

Water Penetration of Hard-to-Wet Soils: For most efficient water penetration of hard-to-wet soils and the even distribution of applied moisture, use 1 pint per 100 gallons of water as a spot or area treatment.

NOTE: Not for use with aquatic applications in the State of Washington.


Spray mixing and application equipment must be cleaned according to cleaning directions on prior pesticide label before application.
To minimize and help prevent foaming, fill tank 2/3 to 3/4 full of water. Add pesticides and/or fertilizers as directed by label or in the following sequence: 1) Micronutrients and fertilizer; 2) Dry flowables and dispersible granules; 3) Flowables; 4) Water soluble pesticides; 5) Emulsifiable concentrates.

While agitating, add PENTRA-BARK and mix for 1 to 2 minutes with lower than normal agitation. Continue filling tank maintaining minimal agitation. For most effective results, apply within 36 hours after mixing.

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What is the concentration o Pentra - Bark for fungicide bark spray-1.5-2.5% or 0.05-0.25%?

Pentra - Bark is applied at 1.5-2.5% for basal bark applications per the manufacturer’s product label instructions.

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