Published September 20, 2014 at 500 × 334 in Plants Respond to Leaf Vibrations Caused by Insects’ Chewing, MU Study Finds Heidi Appel and Rex Cocroft. Appel and Cocroft determined that plants respond to the sounds that caterpillars make when eating plants and that the plants respond with more defenses. Image credit: Roger Meissen (Visited 11 times, 1 visits today)