This research was conducted in the district Lurin (Lima) during the months of September 2011 to February 2012, had as main objective to determine the population dynamics of insects present in "tara". The methodology used was for weekly assessments of insect pests and beneficia! to determine their taxonomic position, which was supported by SENASA Lima. The conditions of the experimental plot was sandy soil through drip irrigation with wastewater from the oxidation pond in the district of Lurin, as interday, no insecticides were applied. The plantation Tara was an age of 2 years and the distribution of the plots were randomly selected from 5 plots with 9 floors each, which were evaluated as a whole. The results obtained during the experiment focused on two parameters, presence of pests and their fluctuation and the presence of beneficia! insects. We found the following pests: Melipotis fam...