Some Earwigs species (Dermaptera: Forficulidae) are important predators of the fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae). The effects of constant temperatures on the development of Doru luteipes (Scudder) and Doru lineare (Eschs.) were evaluated. The development of D. luteipes was not completed at 30 and 32°C, whereas D. lineare did not complete only at 32°C. The incubation period ranged from 8.0 (25°C) to 17.2 days (18oC) for D. luteipes and D. lineare, respectively. The duration of the nymphal stage ranged from 30.4 (25°C) to 63.6 days (18°C) for D. luteipes and, from 20.4 (30°C) to 60.5 days (18°C) for D. lineare. The duration of the biological cycle (egg-adult) varied from 38.4 (25°C) to 80.8 days (18°C) for D. luteipes and from 25 (30°C) to 75 days (18°C) for D. lineare. Therefore, high temperatures were unfavorable for both species, but D. luteipes is more susceptible to higher temperatures.
biological control; degree-days; earwigs; predator; thermal constant
