I have noticed for the last few weeks that a holly fern I have is looking pretty bad. So I was inspecting it, finding an orange 1/4 of an inch bug. At first I thought it was a spider. Upon closer inspection it's got 6 black legs and 2 antenna. My husband thinks it's an aphid (I now have one captured in a glass jar sitting by my desk), but I'm not so sure. Although this fern is planted in an urn with english ivy, so it's a possibility it could be aphids. The leaves of the fern are turning brown on the edges and it looks like something is munching on them. The ivy looks o.k.! Help! What do I do? Make my own soap mixture or go to the store and get something?