Abstract

ALVA ROMERO, David; CALDERON ARIAS, Carmen  and  PISFIL COLCHADO, Katheryn Georget. Biological cycle and predatory capacity of Podisus nigrispinus (Dallas, 1851) in larvae of Spodoptera frugiperda (Walker, 1857), S. eridania (Cramer, 1782) and Galleria sp. (Linnaeus, 1756) under laboratory conditions. Ecol. apl. [online]. 2020, vol.19, n.2, pp.103-110. ISSN 1726-2216.  http://dx.doi.org/10.21704/rea.v19i2.1561.

Podisus nigrispinus (Hemiptera: Pentatomidae) is a predator and important biological controller. The objective of this research was to determine under laboratory conditions the biological cycle and the predatory capacity of nymphs and adults of Podisus nigrispinus (predator) using larvae of Spodoptera frugiperda, S. eridania and Galleriasp. (dams). The experiments were carried out under controlled conditions of temperature (23 °C ± 5 °C) and relative humidity (72% ± 6%). The treatments consisted of an individual from each stage of development of P. nigrispinus (nymph II, III, IV, V and the adult) supplied with 30 larvae from each prey throughout the life cycle, making a total of twenty treatments. The parameters evaluated for the life cycle were: number of days of life per nymph state and longevity in adult state and life cycle of the individual in relation to each prey. For the predatory capacity the parameters were: number of predated larvae and maximum number of prey consumed per nymph and adult stage. The data obtained in the evaluations were analyzed using the Kruskall-Wallis test. The results indicated that the number of days of life for nymphs were 14.6, 33.35 and 36.95 and for adults 29.5, 33.35 and 36.95, with a life cycle of 44.10, 66.70 and 73.20 days for S. frugiperda, S. eridania and Galleriasp. respectively. The consumption of larvae in nymph stage of P. nigrispinus was 21.90, 20.20 and 13.05; and in adult stage it was 29.5, 33.35 36.95 for S. frugiperda, S. eridania and Galleriasp. respectively. The maximum predatory capacity of P. nigrispinus in nymph stage was 28.00 and in adult stage it was 50.00, both with larvae of S. frugiperda. Consequently, it was shown that P. nigrispinus in adult stage had a greater predatory capacity when S. nigrispinus larvae were fed to it.

Keywords : predatory activity; biological cycle; Podisus nigrispinus; Galleria; Spodoptera.

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