TY - JOUR N2 - Tetranychus urticae (Acari: Tetranychidae) infesting many plants but Mentha viridis L., and Mentha piperita L., were low in number of infestation. Therefore the objective of this study was to identify the resistance of M. viridis and M. piperita plants against T. urticae by studying the external shape and internal contents of those plants. For morphological studies, dried leaves were covered with gold utilizing an Edwards Scan coat six sputter-coater. For histological studies, arrangements of Soft Tissue technique were used. For phytochemical studies, the plants were cut, dried and then high performance liquid chromatography (HPLC) was used. While feeding the mites were collected from the area between oily glands, trichomes and respiratory stomata in both mint species. The most important leaf structures in aromatic plants are the oily glands found on the external part of the leaves (both upper and lower epidermis). The number of oil glands in M. viridis leaves was greater than in M. piperita; the trichomes on the epidermis of M. viridis were greater in number than in M. piperita; the spongy mesophyll in M. viridis was much thicker than in M. piperita. The essential oils in the leaves of both mint species contained 71 compounds representing 99.61% of the total oil constituents identified from M. viridis before infestation, and 90.95% after infestation, and about 99.65% from M. piperita before infestation, and 99.98% after infestation. L1 - http://www.czasopisma.pan.pl/Content/107184/PDF/AO7_JPPR_58_3_Allam.pdf L2 - http://www.czasopisma.pan.pl/Content/107184 PY - 2018 IS - No 3 EP - 275 DO - 10.24425/122943 KW - ecology KW - high performance liquid chromatography KW - Mentha piperita L. KW - M. viridis KW - organic farming KW - Tetranychus urticae A1 - Allam, Sally Farouk A1 - Soudy, Basem Abdel-Nasser A1 - Hassan, Ahmed Salah A1 - Ramadan, Mahmoud Mohamed A1 - Baker, Doha Abo PB - Committee of Plant Protection PAS PB - Institute of Plant Protection – National Research Institute VL - vol. 58 DA - 2018.10.10 T1 - How do mentha plants induce resistance against Tetranychus urticae (Acari: Tetranychidae) in organic farming? SP - 265 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/107184 T2 - Journal of Plant Protection Research ER -