SAO PAULO (Reuters) -Approval for Brazilian President Luiz Inacio Lula da Silva's government rose for the first time this year, a new poll showed on Wednesday, after his U.S. counterpart Donald Trump announced a 50% tariff on imports from Brazil starting in August. The Quaest poll commissioned by brokerage Genial showed that 43% of those surveyed approve of Lula's administration, up from 40% in the previous poll in May. Meanwhile, the government's disapproval fell from 57% to 53% in the period. The Genial/Quaest poll surveyed 2,004 eligible voters in person between July 10 and July 14. The poll has a margin of error of plus or minus two percentage points. (Reporting by Andre Romani; Editing by Brendan O'Boyle)