Objective.

In this work some biological features of this scale specie were analized and observed, recording specific life cycle attributes, such as population dynamics, mortality-fecundity factors and a description of their nymphal instars in the studied place.

Methodology.

The work was conducted under a mesh house and laboratory conditions. In one hand, nymphs from the field were stablished on S. humboldtiana cuttings located in a 3,8 m3 wood, plastic and mesh structure into a mesh house. On the other hand, 120 eggs were conditioned in polipropilene dishes with wood. Weekly observations and data collection were done util adult emergence.

Results.

From the nymphs collected in the field, a 301,8 ± 40,5 days univoltine life cycle was registered (14.5°C, RH: 72.5; 12 hours photoperiod), with three nymphal stages of 283,6 ± 32,4 days and 18,2 ± 8,1 days estimated longevity. The specific mortality rate (q x ) calculated in the life table by cohorts, was estimated for egg in 0.24; nymph I 0, 17, nymph II 0,47 and nymph III 0,83. The intrinsic per capite growth rate (r= -0, 63<0), as well as the net reproductive index R o (0,798<1) indicate a possible diapause under hoop house.

Conclusion.

According to the survival curves (l x ) found in nymph III (0,19) and adult female (0,03), the application of control agents in these susceptible stages is recommended.

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