Gypsy Moth eradication is also used by the Canadian Government to slow the spread. An infestation in Surrey, British Columbia is expanding and will be targeted for eradication. The projected cost is $1 million. The benefit? CBC has this quote from Tim Ebata of the Ministry of Forests &c,
Because we have agreed to be gypsy moth-free in Western North America, our trading partners in the U.S. would quarantine us—or impose some kind of trade restriction if we had infested material that would move across the border.
Invasive species are an economic threat that keeps entomologists busy.