Parámetros biológicos de Tetranychus desertorum (Acari: Tetranychidae) sobre hojas de poroto

Abstract

The study on the biology of Tetranychus desertorum on Phaseolus vulgaris Linnaeus var. canario was carried out under controlled conditions of 25.0 ± 2.0 °C temperature, 70.0 ± 5.0% RH and 12:12 h (L:D) photophase. The egg to adult time span lasted 11.33 ± 0.11 days, with a 62.8% survival. The sexual ratio was 83.7% females: 23.7 males. The mean female longevity was 15.5 ± 0.8 days and the daily mean oviposition was 4.8 ± 0.2 eggs/female/day. The intrinsic rate of increase (rm) was 0.188; the finite rate of increase (λ) was of 1.207 individuals/female/day; the mean time span of one generation (T) was 18.24 days; and the net rate of reproduction (R0) was 30.85. The development patterns of T. desertorum fall within those described for mites of the family Tetranychidae. © 2014 Universidad de Tarapacá.