Answer: Caterpillar can be eliminated with a product called Bt (bacillus thuringensis) which is sold as Dipel or Thuricide in the garden center. It is a bacterium that acts as a stomach poison and targets only caterpillars. They have to consume the treated leaves before it is effective so if you spray early in the season when you first see the caterpillars it should control them before too much damage is done. Be sure to apply according to label directions. Repeat sprays may be necessary. Good luck with your passionflower vine.
Q&A Library Searching Tips