How do you know that a catterpillar has visited the leaf?

Answer 1

You can tell a caterpillar has visited a leaf by looking for specific signs such as distinct chewed edges or irregular holes in the leaf. Additionally, you might notice frass, which are small droppings left behind by the caterpillar, scattered near or on the leaf. Sometimes, the presence of silk threads or webs, indicating the caterpillar's movement, can also be observed.