The objective of this study is to evaluate the efficacy of insecticides employed by tomato cultivators against Tuta absoluta under greenhouse conditions, during the 2021-2022 crop year in the region of Biskra (south-eastern Algeria). Three experimental sites (Ain Naga, M'ziraa and Doucen) were selected for the study, each of which was equipped with a greenhouse. Samples of tomato leaves were collected on a fortnightly basis, following each treatment, at three levels of the plant (basal, middle and apical), with the objective of evaluating infestation rates. The highest infestation rates were observed between spring and summer, reaching 64.35%, 61.34% and 55.55% respectively at Ain Naga, M'ziraa and Doucen. Basal leaves exhibited the highest infestations in all three sites, with averages of 47.29, 34.62 and 37.36 in Ain Naga, M'ziraa and Doucen, respectively. Abamectin, the most frequently used active ingredient, demonstrated variable efficacy depending on its commercial formulation. The efficacy of combinations with other active ingredients, such as Emamectin benzoate and Chlorantraniliprole, was found to be moderate to good. Conversely, the efficacy of Acetamiprid-based products was found to be contingent upon their formulation. When administered as a standalone treatment, active ingredients such as Emamectin benzoate and Thiocyclam hydroxalate exhibited only marginal effectiveness