Peter from Boca Raton, Fl writes
Fertilome Borer, Bagworm, Tent Caterpillar & Leaf Miner Spray will eradicate listed pests and does not specifically list iris applications. This can be a difficult pest to control on infested plants, so the best prevention is good sanitation and elimination of infested plants. You can use Neem Oil and/or Evergreen Pyrethrum Dust to treat plants before egg hatch of Iris Borer. This article has more information about this common pest.
Answer last updated on: 09/29/2017