Kill and repel a number of surface and subsoil pests with Grub Buster Ready to Spray Insecticide. Bonide Grub Beater Insect Control Ready-to-Spray is an insecticide, repellant, insect growth regulator. Kills and repels insects – Japanese Beetles. Grub Beater’s effectiveness is based on three modes of action: 1. Anti-feedant: Suppresses the insect’s desire to feed and, therefore, no damage is caused. 2. Repellent: Insects simply stay away from areas sprayed with Grub Beater and, therefore, no damage is caused. 3. Insect Growth Regulator: Disrupts the insect’s delicate hormonal balance, so it dies before it molts to the next life stage. Active Ingredient: Azadirachtin, 0.09% Due to changes in shipping regulations, we cannot ship this item to California.