Termidor is definitely the most popular termite treatment product available. Phantom was made more for indoor pest control and perimeter pest control treatments. Since Termidor is not labeled to treat around the indoors for pest control, Phantom was made to serve that purpose. Although Phantom is labeled for termites treating, it does not last nearly as long as Termidor does in the ground and it is also much more costly per finished gallon than Termidor is.
Phantom Termiticide Insecticide is labeled for boxelder bugs and should do a great job in eliminating this pest. Be sure to read pages 10-11 of the Phantom product label for more information on how to use the product correctly for this type of treatment.