 The Argentine ant was first discovered in the United States at New Orleans in 1891, New International Encyclopedia and the alfalfa leaf weevil was first discovered in Utah in 1904.Establishing control over an increasing number of insect pests and insect-borne diseases led to the establishment of the Bureau of Entomology.The Bureau of Entomology conducted researches into methods which could reduce the spread and the frequency of occurrence of insect pests.