Herbicides commonly used in forestry are available under a variety of trade names.  Therefore, it is best to become familiar with common names (active ingredients).  The following table lists alphabetically by common name forestry herbicides labeled for use in Pennsylvania.  The herbicides are effective for controlling competing vegetation in northeastern hardwood and coniferous forests.  The trade name and manufacturer are shown in the columns that follow.  Trade names are grouped according to active ingredient.  This table is strictly a guide and is not meant to be all inclusive.  No endorsement or support if an individual product or company is given or implied.