Abstract
The present study was proposed to stepwise investigation for differences between Rosa damascena Miller var. trigintipetala and Rosa hybrida concerning volatiles emitted from leaves and synthesizing of secondary metabolites such as phenolic compounds induced by herbivore mite Tetranychus urticae Koch, The cross talk between these defense compounds and phytoseiid mite natural enemy. Also biology of T. urticae on both rose cultivars, considering unique surplus rose oils of R. damascene over these experiments. Results obtained showed that female egg production of T. urticae on R. damascene approached 1/3 that for R hybrida cultivar. Although the prey consumption of A. californicus was almost similar on both cultivars in the laboratory. It as noticed that induced defense constituents such as a-pinene, myrecene, farncen eucalyptol and caryophelene were more abundant in infested leaves of R. damscena than check. On the other hand Eucalyptol as biopesticide was missing in R. hybnda which in turn were distinctive in containing methyl salicylic acid working as an attractant for predatory mite. However the picture of phenolic acid quantities resulted from Taif's rose are not identical with wT cv. That is a regular induction to synthesis higher quantity of phenolics comparing to check. Some of these compounds were traces in check but duplicated several times due to T urticae infestation such as Luteolin, Vanillic, Caffeic, Cholorgenic acids. Also other phenolic acids as Gallic' catshinec T. Ferulic acids were duplicated and more which in turn reflect the induced resistance or the antibiotic effect of Taif's rose secondary metabolites.