モンシロチョウ
Another potential enemy of "P. oleracea" is a member of its own genus, "Pieris rapae." After introduction of this species in an area in New England populated by "P. oleracea", the native populations were entirely wiped out. In many cases this appears to be because of competition for foraging sites. However, there has been a case observed where the two species were able to coexist successfully.