Phytohormone levels in leaflets infested with spider mites, russet mites, and both species simultaneously. The amounts of endogenous JA (A), JA-Ile (B) and SA (C) in wild-type (WT) tomato (cv. MM) and nahG leaflets infested with spider mites (SM), russet mites (RM) or both species (Both mites) together (seven days after infestation). Values represent the means (+SE) in nanogram (ng) per gram fresh weight (g FW) of nine to ten plants from two independent experiments. Different lowercase letters denote significant differences for WT plants; uppercase letters denote significant differences for nahG plants (ANOVA followed by Fisher’s LSD test; P <0.05). ANOVA, analysis of variance; JA, jasmonic acid; LSD, least significant difference; SA, salicylic acid; SE, standard error.