Roundup PowerMax II Herbicide

5 out of 5 stars 1 Reviews | 1 Q&A

Roundup PowerMax II Herbicide
Roundup PowerMax II Herbicide

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Average Rating

5 out of 5 stars Rating: 5

1 Review | 1 Q&A

Product Overview

Roundup PowerMax II Herbicide is a water-soluble formula that delivers post-emergent control of a wide variety of annual and perennial weeds, woody brush, vines, and trees. This non-selective herbicide contains Glyphosate as its active ingredient which provides systemic control of tough weeds and grass such as alfalfa, alligatorweed, bahiagrass, bentgrass, bermudagrass, bindweed, dandelion, curly dock, fescue, horsenettle, buckwheat, hickory, kudzu, sage, and more. It features Cropshield technology which offers a superior level of crop safety while ensuring excellent protection against weeds. Labeled for use on cereal and grains, corn, cotton, fallow systems, herbs, soybean, sugarcane, legume vegetables, and other vegetable crops. Available in a 2.5-gallon jug.

Features and Specs

Active Ingredient Glyphosate - 48.8%
Target pests Annual and perennial weeds, woody brush, trees and vines.
For use in Cereal and grains, Corn, Cotton, Fallow systems, Herbs, Soybean, Sugarcane, Legume vegetables, and other Vegetable Crops, Tree, Vine, and Shrub Crops.
Application Apply this product at the appropriate rate as specified on this label in 3 to 40 gallons of water per acre when making a broadcast application using ground application equipment, unless otherwise directed on the label.
Pet safe Yes, if used as directed on label.
Formulation Water-soluble Liquid.
Special Features It features Monsanto's proprietary CROPSHIELD technology which provides high levels of crop safety on Roundup Ready crops.
Shipping Weight 29.18 lbs
Manufacturer Monsanto Company
EPA Registration 524-537



It is formulated as a water-soluble liquid containing surfactant and may be applied using standard and specialized pesticide application equipment after dilution and thorough mixing with water or other carrier according to label directions.

Do not add surfactants, additives containing surfactants, buffering agents or pH adjusting agents to the spray solution when Roundup PowerMAX II Herbicide is the only pesticide being applied unless otherwise directed. See the “MIXING” section of this label for instructions regarding other additives.

Mechanism of Action: The active ingredient in this product inhibits an enzyme found only in plants and microorganisms that is essential to the formation of specific amino acids.

No Soil Activity: This product binds tightly to soil particles and does not provide residual weed control. Weeds must be emerged at the time of application to be controlled by foliar application of this product. Weed seeds in the soil will not be affected by this product and will continue to germinate. Unattached plant rhizomes and rootstocks beneath the soil surface will also not be affected by this product.

Biological Degradation: Degradation of this product is primarily a biological process carried out by soil microbes.

Stage of Weeds: Annual weeds are easiest to control when they are small. Enhanced control of most perennial weeds is obtained when this product is applied at late growth stages approaching maturity. Refer to the “ANNUAL WEEDS RATE SECTION,” “PERENNIAL WEEDS RATE SECTION” and “WOODY BRUSH, TREES AND VINES RATE SECTION” for more information on the control of specific weeds.

Cultural Considerations: Reduced weed control could result when this product is applied to annual or perennial weeds that have been mowed, grazed or cut, and have not been allowed to re-grow prior to application. Always use a higher product application rate within the given range when weed growth is heavy or dense, or when weeds are growing in an undisturbed (non-cultivated) area. Reduced weed control could also result when this product is applied to weeds that show signs of disease or insect damage, are covered with dust, or are surviving under poor growing conditions.

Spray Coverage: For enhanced results, spray coverage must be uniform and complete. Do not spray foliage to the point of runoff.

Rainfastness: Rainfall within 4 hours of application could wash this product off of the foliage and a second application might then be needed for acceptable weed control. Refer to specific use sections of this label for additional information on the minimum intervals required before re-application of this product.

Time to Symptoms: This product moves through the plant from the point of foliage contact to and into the root system. Visible effects are a gradual wilting and yellowing of the plant that advances to complete browning of aboveground growth and deterioration of underground plant parts. Effects are visible on most annual weeds within 2 to 4 days, but on most perennial weeds, effects might not be visible for 7 or more days after application. Extremely cool or cloudy weather following application could slow activity of this product and delay development of visual symptoms.

Maximum Application Rates: The maximum application or use rates stated throughout this label are given in units of volume (fluid ounces or quarts) of this product per acre. However, the maximum allowable application rates apply to this product combined with the use of any and all other herbicides containing the active ingredient glyphosate, whether applied separately or in a tank mixture, on a basis of total pounds of glyphosate (acid equivalents) per acre. If more than one glyphosate-containing product is applied to the same site within the same year, you must ensure that the total use of glyphosate (pounds acid equivalents) does not exceed the maximum allowed. See the “INGREDIENTS” section of this label for necessary product information.

Ground Application Equipment

Apply this product at the appropriate rate as specified on this label in 3 to 40 gallons of water per acre when making a broadcast application using ground application equipment, unless otherwise directed on this label or on separate supplemental labeling or Fact Sheets published for this product. As the weed density increases, increase the spray volume towards the upper end of this range to ensure complete coverage. Use nozzles that will avoid generating a fine mist. For enhanced results with ground application equipment, use flat-fan nozzles. Check spray pattern for uniform distribution of spray droplets.

Handheld Sprayers

When using a handheld sprayer, apply spray solutions of this product uniformly and completely to the foliage of target weeds using a coarse droplet spectrum and a spray-to-wet technique; do not spray to the point of runoff. For the appropriate concentration of this product in the spray solution and timing of application to control specific weeds, woody brush, trees and vines, refer to the “ANNUAL WEEDS RATE SECTION,” “PERENNIAL WEEDS RATE SECTION” and “WOODY BRUSH, TREES AND VINES RATE SECTION” of this label.

Spot treatment application of this product for weed control in a cropping system using a handheld sprayer may be made only when specifically directed on this label or on separate supplemental labeling for this product. The crop sprayed with this product will be killed along with the weeds. Take care not to spray or allow spray to drift outside the target area in order to avoid unwanted crop destruction.


Environmental Hazards:

Do not apply directly to water, to areas where surface water is present or to intertidal areas below the mean high-water mark. Do not contaminate water when cleaning equipment or disposing of equipment wash waters and rinsate.

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  • 5 of 5 Stars

    First time customer

    By Dale on 04/10/2020

    Very easy transaction, speedy delivery. Will purchase from this company again.

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Questions & Answers

Have a question about this product?
How much Roundup PowerMax II Herbicide do you mix in 25 gallons of water?

When using Roundup PowerMax II Herbicide in 25 gallons of water you can use anywhere from 13 fl oz to 7 quarts. Please see the “Mixing Spray Solution Concentrations”  table on page 3 of the product label for the percentage of Glyphosate associated with each amount.   

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Roundup PowerMax II Herbicide 5 out of 5 stars Rating: 5 (1 Reviews / 1 Q&A)

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