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Easy Wilt Pruf® application

Posted by John Graff on 11/23/2013 to Keeping Plants Healthy

We have compiled this overview of Wilt Pruf® information with the intent of clarifying and simplifying the application process. This summarizes information provided by the manufacturer in various publications including their current brochure and instructional video. Note that Wilt Pruf® is intended for use on evergreen trees and shubs, it can be safely applied to the woody stems and bark of decidous trees however application to the foliage of non-evergreens is experimental and should be tested first. An exception is Roses which we have found tolerate Wilt Pruf® well with aim of improving plant health.

We often get questions regarding coverage. The best way to estimate your requirements is to test spraying water with your sprayer on a few of the plants you intend to treat. If you are not able to test a rough guideline that can be used is a quart of spray solution will cover the average 5' - 6' Christmas Tree. Note this is a very rough estimate, there are many factors to consider including type of sprayer, density of foliage and plant variety. Once you have your spray solution requirements you can calculate the amount of concentrate you need by dividing your spay solution requirements by the yields listed below

Choose your application from the list below, dilute accordingly and apply by spray or dip.

Applications and Dilution Rates:

  • Evergreen Winter Protection: 1:5 (1 part Wilt Pruf® to 5 parts water) yields 6 gallons of spray solution / gallon of concentrate.
  • Greenery spray or dip - 1:5 (1 part Wilt Pruf® to 5 parts water) yields 6 gallons of spray solution / gallon of concentrate.
  • Bulb and Tuber Storage Protection dip or spray - (1 part Wilt Pruf® to 10 parts water) yields 11 gallons of spray solution / gallon of concentrate.
  • Transplanting / Drought Protection- 1:10 (1 part Wilt Pruf® to 10 parts water) yields 11 gallons of spray solution / gallon of concentrate.
  • Rose protection - 1:10 (1 part Wilt Pruf® to 10 parts water) yields 11 gallons of spray solution / gallon of concentrate.

How to Mix:

  1. Wilt Pruf® may separate while standing unused, check the container of concentrate for separation or layering of the solution, it should be a uniform white color. If there are signs of separation agitate by shaking the container or stirring. A paint stirrer attached to a cordless drill is a convenient way to stir Wilt Pruf® in the container (our new wide-mouth containers are designed for that purpose).
  2. Add the Wilt-Pruf® concentrate to water... not water to Wilt-Pruf® according to the dilution rate for your application. Stir the solution with paint stirrer.

Application:

  • Once mixed, Wilt-Pruf® may be sprayed with any pressure type trombone, pump or power sprayer except hose end(does not provide accurate mixing rates and due to the high volume much of the spray will be wasted when it runs off the plant). The more pressure, the better the spray pattern.
  • Spray Wilt-Pruf® anytime as long as the spray does not freeze on the foliage while spraying. Allow two or three hours for drying time in daylight (not necessarily sunlight). Wilt-Pruf® is a film forming polymer and needs ultraviolet daylight rays in order for the spray to set up or polymerize.
  • When spraying, attempt to wet all foliage including undersides, apply just to run-off.
  • After dipping greenery it is handy to have a catch tray below dipped items as they dry on a screen or hung from above.
  • When spraying Aborvitate, Cedar, Cypress and Juniper for winter Protection it is important to wait until late fall when those species have had a chance to harden off and the moisture in the foliage has retreated to the root system for the Winter. If abundant moisture is left in the foliage of those species and an earlier than normal deep freeze should occur, moisture in the plant cells could freeze and burst causing damage.
  • Sprayers should be cleaned thoroughly by rinsing with warm water and detergent immediately after use.
  • Surfaces sprayed inadvertently may be washed with warm water and a mild detergent. Dried film can be dissolved with difficulty using kerosene. Over-spraying on cars, terraces, windows, etc. should always be avoided.