After Applying an Herbicide

Any time you apply a pesticide, make a complete record of it. Record the date of application, material, formulation, rate, area treated, volume of water, growth stage of crop and weeds, and comments on anything unusual. To be able to assess the treatment's effectiveness, also record the following weather factors: temperature, cloud cover, and time to next 0.5 inch rainfall.

If the material did not work, check your records to see why. You may need to alter the time or rate of application, application technique, or chemical used. If trees are injured, accurate records will help you determine what changes must be made to prevent injury from reoccurring.