Where do horned tomato worms come from?
They are the larvae of the “Tobacco Sphinx Moth” a very large night flying insect. Their wingspan can be up to 5″ from wing tip to wing tip. The reason you haven’t seen it up until now, is that it was very small after hatching from eggs laid on the leaf by the adult moth. As it eats and gorges itself on your tomato plant, it begins to grow very fast. After a couple of weeks, that little larvae that was unnoticeable on the plant, is now a big, fat, green caterpillar devouring every bit of green matter it can get its mandibles on. Hope this answers your question. http://home.att.net/~larvalbugbio/sphinx…
