Objectives:

To determine the period of duration of the developmental stages of Trigonospila unicaldasi, under fi ve diff erent thermal regimes (18, 20, 22, 25 and 28 °C), using Compsus sp. as a substrate, and to calculate the base temperature of development and the accumulated days-degrees (or thermal constant) to complete the developmental stages of the parasitoid. Scope: Thermal requirements of T. unicaldasi.

Methodology:

The duration of the diff erent stages of development of T. unicaldasi was determined until reaching adulthood with the help of a stereomicroscope. The days-degrees were calculated using the average temperature method.

Main results:

The stages of the egg, larva 1, larva 2, larva 3, pupa and adult egg of T. unicaldasi, showed base temperatures of 18.6; 19.2; 17.7; 19.1; 18.6 and 18.8 °C respectively, and thermal constants of 29.9; 14.5; 21.4; 16.3; 17.5 and 97.4 °D, respectively.

Conclusions:

The thermal requirements of T. unicaldasi, a new parasitoid species of Compsus sp., were determined.

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