my son was super terrified of bugs and insects in the house this early spring. His is now four years old... I figured I would need to do something as summer was approaching because hey, bugs are everywhere, right?
First, we did begin to ignore the tantrums and reactions (he totally freaked out with tears and all, to the point I thought he was injured!) So we would ask: Are you hurt, bleeding, etc. and the answer was always "No". So I said gently, "Then why are you doing this? Insects are helpful to us." (as much as I hate them too! LOL~)
Second, we purchased a big book (and it was on sale!) at B&N on insects. He actually LOVED IT!. We also made a big deal over a butterfly one day, and now he ADORES butterflies to the point that we purchased the 'Bugville' kit. (That was cool, until I had baby caterpillars all over the place, so that went outside quickly!).
I found that these little steps helped. He's all about bugs now (such a boy!). I have to stop him from bringing them in with his 'jelly jar' (his bug container).
So this is my experience with a fear. Similar in a way, and it is able to be overcome. I suggest perhaps books, stuffed toys (or puppets as they can be used later for fun!) and then a trip to the pet store with you, her and dad so she feels safe and less stressed about it.
Good Luck! :)