The gall-wasp, Leptocybe invasa Fisher & La-Salle (Hymenoptera: Eulophidae), a pest native to Australia, was introduced into several countries with eucalyptus cultivation. This insect has high damage capacity and reproductive rate. Leptocybe invasa was recorded in the Itapoã farm (S 19° 18′ 06″ -W 44° 30′ 13″), Paraopeba municipality, Minas Gerais State, Brazil in areas of research, nursery and in the field. Maximum, minimum, and ambient temperatures and relative humidity were 23 °C, 14 °C and 21 °C and 67%, respectively. Leptocybe invasa is a significant pest problem in Minas Gerais State, Brazil, because this state has 1,400,000 ha of the eucalyptus plantations of Brazil.