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Idesia (Arica)

On-line version ISSN 0718-3429

Abstract

CURITIBA ESPINDULA, Marcelo et al. DEVELOPMENT AND REPRODUCTION OF PODISUS NIGRISPINUS (HETEROPTERA: PENTATOMIDAE) FED ON HELIOTHIS VIRESCENS (LEPIDOPTERA: NOCTUIDAE) CATERPILLARS. Idesia [online]. 2010, vol.28, n.3, pp.17-24. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292010000300003.

Heliothis virescens (Fabr.) (Lepidoptera: Noctuidae) is a polyphagous insect widely distributed in the American continent, in which the use of chemical pesticides is the most common control strategy. The impacts caused by such practice make it necessary to seek alternatives for the management of this insect-pest. The objective of this work was to evaluate the development and reproduction of Podisus nigrispinus ( Dallas) (Heteroptera: Pentatomidae) fed on H. virescens caterpillars compared with those fed on Tenebrio molitor L. (Coleoptera: Tenebrionidae) pupae. The experiment was carried out in an acclimatized room 25 ± 1 ºC, 70 ± 15% relative humidity and photophase of 14 hours. The experiment was arranged in a complete randomized design with 50 and 20 repetitions at stages I and II, respectively. The nymphal development of this predator was similar with both prey, but the results for number of egg-layings, eggs and nymphs per female, as well as the interval between egg-layings of P. nigrispinus were better with T. molitor. In conclusion, P. nigrispinus showed satisfactory nymphal development with H. virescens caterpillars, but better reproductive success when it was fed on T. molitor prey.

Keywords : Cotton; biological control; development rate; reproductive gain.

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