Outside of Tree or Shrub
WE NO LONGER RECOMMEND ANY SYNTHETIC INSECTICIDES FOR DEALING WITH INSECTS MUNCHING ON LEAVES AND FLOWERS. THE NATURAL ORGANIC PRODUCTS NOW AVAILABLE ARE PERFECTLY EFFECTIVE FOR THE KINDS OF INSECTS THAT ATTACK THE FOLIAGE OF A TREE.
Inside Tree or Shrub -
FOR DEALING WITH INSECTS CHOMPING INSIDE THE TREE'S TRUNK OR LIMBS, THERE IS STILL A NEED FOR SYNTHETIC INSECTICIDES.
Products such as Tree & Shrub Insect Killer by Bayer, Borer & Miner Killer by Bonide, and Bullets by Bonide are systemic insecticides that will kill insects boring inside of the tree's leaves or bark, inaccessible to most insecticides.