Abstract

RUIZ DIAZ, Ángel Alberto et al. Population behavior of Tetranychus urticae Koch. (Acari: Tetranychidae) in tomato varieties. Rev. Mex. Cienc. Agríc [online]. 2018, vol.9, n.5, pp.961-969. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v9i5.1505.

Ten tomato varieties were examined for resistance to Tetranychus urticae by bioassays on leaf discs. A colony of T. urticae from different ornamental crops of Saltillo, Coahuila, Mexico, was established in bean seedlings (Phaseolus vulgaris L.) in a Biotronette chamber. At 25 ±2 °C, 60-70 HR and 12:12 h L: D. According to the design of the experiment, the females were placed in leaf discs of the 10 tomato varieties under study in a proportion of 10 disc with 90 repetitions, the behavior was evaluated based on survival, repellency and mortality. Subsequently, 100 freshly mated and fertilized one-day-old females were transferred to discs of tomato leaves (Solanum lycopersicum L.) of 1.3 cm in diameter of cultivars ‛Tsan-101’, ‛Toro’, ‛Saladette’ and ‛Cereza’ in such a way that each experimental unit included 1 female per disk. The demographic parameters in this experiment showed a lower growth potential of this pest in the cultivars ‛Tsan-101’ and ‛Toro’ than in ‛Saladette’ and ‛Cereza’.

Keywords : Tetranychus urticae; population parameters; resistance; tomato.

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