chemical composition and morphological characters Fences plants are the first defense soldiers Against many pests also Against Tetranychus urticae (Acari: Tetranychidae) so this study has been done to confirm that the aromatic plants are the first defense soldiers and makes infesting of pests for plants growing beside it. Two replicates (with zero and 10 % infestation with T. urticae) per each lantana camara and Dodonaea Dodonaea potted plants were used to evaluate the changes before and after infestation to their compounds. After two weeks of growing, the plants cut and dried. Cinnamic (7.97%) and Kaempferol (37.65%) after infestation with T. urticae as the major compound in l. camara, while D. Dodonaea contains Apigenin-7-glucoside (3.19%) and Caffeic (0,67%).and phenolic acids Rosmarinic acid 12.43 after infestation but D. Dodonaea 23.43. also Sinapic acid 87 and 23 Coumarin acid 4321 Protochatchuic 17,2 Rutin acid 43,21.1 Syrngic acids 54,0 for L. Camara and but D. Dodonaea respectively as the most abundant component after infestation. L.Camara Dried leaves were covered with gold utilizing an Edwards Scancoat SIX sputter-coater and thusly analyzed in a Phillips XL 30 ESEM magnifying lens utilize the HiVac modus (i.e. auxiliary electron identifier, increasing speed voltage 15Kv). Ten grams of the samples were put in water distillation (500 ml water) using a Clevenger's apparatus. The distillation was continued for 4 h after boiling. The volatile substances were isolated and dried over anhydrous Na2SO4. was the most of planting as fences plants for its morphological and phytochemical studies that's makes it more effective for planting grows beside.