In 1992, Baltimore Mayor Kurt L, Schmoke created the Rodent Control Committ
ee to combat the increasing Norway rat population in Baltimore City. Follow
ing a pilot project, programs were conducted in two sections of the city fr
om which high numbers of rat complaints had been reported, These three-mont
h programs attacked the rodent problem via an integrated pest management ap
proach that emphasized public education by trained community leaders and he
alth department workers, increased community cleanup projects coordinated b
y the Bureau of Solid Waste, and intensified baiting by the city's Rat Rubo
ut Program, Direct intervention eliminated up to 90 percent of rat burrows
present in the target neighborhoods. Follow-up surveys, however, showed tha
t in neighborhoods with environmental factors favoring rat populations, rei
nfestations achieved preintervention levels within six months, Attempts to
modify the behavior of residents, which is vital in reducing and eliminatin
g rodent infestation, were generally unsuccessful.