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The status of tomato leaf-miner, Tuta absoluta (Meyrick), at Matrouh Governorate, Egypt was investigated under the greenhouse conditions during 2010 season as the first documented data concerting the crossing of this pest into the Egyptian borders coming from Libya. In both El-Kasr region and Siwa Oasis, the periodical monitoring of T absoluta male moths on both tomato and eggplant were carried out using the sex pheromone lure baited traps. Also, the influence of male collection technique and one tracer spraying on declining the larval infestation were evaluated. Data declared that, tomato was the most preferable host for T absoluta than other solanaceous crops, the in-time hanging of sex pheromone baited traps inside the tomato or eggplant greenhouse besides tracer sprayirig when necessary were the factors that ensured the achievement of less larval infestation. In addition, the influence of neighbor solanaceous crops on the infestation outbreak was also considered. Also, the detection of T absoluta larvae on the wild solanaceous shrub, Solanum nigrum (Black nightshade) was documented for the first time within the valleys of Matrouh Governorate. Mass trapping and lure and kill application of pheromone have been found to be effective for controlling T absoluta.