author(s)
Attia S, Mbarki A, Sahraoui H and Grissa KL

abstract
Key biological parameters of a Tunisian strain of Tetranychus evansi (Acari: Tetranychidae) reared on four solanaceous plants (Solanum tuberosum, Lycopersicon esculentum, Capsicum annuum and Solanum nigrum) were determined under laboratory conditions (30°C, 60% RH and 16:8 L:D). Significant differences in longevity, fecundity, fertility were noticed between T. evansi reared on Solanum nigrum and on the other Solanum crops. The calculated values of the intrinsic rate of natural increase (r_m) were 0.254, 0.236, 0.232 and 0.260 days^-1, respectively, on potato, tomato, pepper and black nightshade.