The seasonal activity of beet flea beetle, Chaetocnema tibialis (Illiger), adults was studied on sugar beet varieties at Homs Region during 2008 season. Results obtained indicate that the beet flea beetle, Chaetocnema tibialis (Illiger) adults was started at the 2nd week of May to all varieties in the 1st and 2nd dates of plantation. The number tended to increase, rather gradually, from early June reaching peak (65.9 and 97.9 holes/25 leaves) for two dates. Two peaks occurred during 2008 season, ware as follows: • The 1st peak occurred in the 4th week and the 2nd week of June (65.9 and 97.9 holes/25 leaves) for 1st and 2nd dates, respectively. • The 2nd peak occurred in the 4th week of July (118.42 and 364.14 holes/25 leaves) for 1st and 2nd dates, respectively. The results obtained indicate, that Vico sugerbeet variety was highest susceptible (50.99 and 116.45 holes/25 leaves) for the 1st and 2nd dates, meanwhile, Ramona and Prognos were lowest infested. The infestation started with quite low holes (2.96 holes/25 leaves) at the 3rd week of May and increased gradually at the 4th week of June with 65.90 holes/leaf, and in end of season arrived to (118.42 holes/25 leaves). The infestation percentage increased by beet flea beetle in the 2nd date (the 1st week of February) with twice of infested on the 1st date (the 1st half of January). Six pesticides were evaluated against beet flea beetle, results showed that Cyperino pesticide gave the highest effective percentage (90.88%) followed Cypermethrin by (90.69%), in comparison with Nimadol pesticide (49.35%) after two week of treatment.