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Iheringia. Série Zoologia

versão impressa ISSN 0073-4721versão On-line ISSN 1678-4766

Resumo

BITTENCOURT, Maria Aparecida L.  e  BERTI FILHO, Evoneo. Thermal requirements for the development of Palmistichus elaeisis (Hymenoptera, Eulophidae) in pupae of five lepidopteran species. Iheringia, Sér. Zool. [online]. 2004, vol.94, n.3, pp.321-323. ISSN 0073-4721.  http://dx.doi.org/10.1590/S0073-47212004000300016.

The thermal requirements of Palmistichus elaeisis Delvare & LaSalle, 1993 were determined by rearing this pupal parasitoid in the following lepidopteran hosts: Diatraea saccharalis (Fabricius, 1794) (Crambidae), Anticarsia gemmatalis (Hübner, 1818), Heliothis virescens (Fabricius, 1777), Spodoptera frugiperda (J.E. Smith, 1797) (Noctuidae) and Thyrinteina arnobia (Stoll, 1782) (Geometridae). The experiment was set in laboratory conditions (temperatures between 18ºC and 30ºC, RH=70 ± 10% and 14-hour photoperiod). The life cycle (egg-adult) ranged from 40.4 ± 0.63 days (18ºC, H. virescens) to 18.1 ± 0.13 days (28ºC, D. saccharalis). The thermal constant of the egg-adult period ranged from 353.1 (D. saccharalis) to 407.7 degree-days (S. frugiperda). The lowest thermal threshold ranged from 5.0ºC (A. gemmatalis) to 7.5ºC (D. saccharalis). At 30ºC, all prepupae died. These results suggest that P. elaeisis can be reared in laboratory on all the hosts tested.

Palavras-chave : Lepidoptera; parasitoids; biology; temperature.

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