Last year, my impatiens were gorgeous. This year they're a bust. Something is eating the tops of them before the buds even have a chance to open. On some of them, not just the tops are getting eaten, but many of the leaves as well, so there are just bare stems sticking up. Does anyone know what this might be? This is irritating the heck out of me!!

If it's an insect, are there any insecticides that impatiens are sensitive to and should not be used? Thanks-

Deanna