Exigências térmicas para o desenvolvimento de Palmistichus elaeisis (Hymenoptera, Eulophidae) em pupas de cinco espécies de lepidópteros

Iheringia. Série Zoologia

Maria Aparecida L. Bittencourt¹  Evoneo Berti Filho² 

[1] ,Universidade Estadual de Santa Cruz Departamento de Ciências Agrárias e Ambientais Ilhéus BA ,Brasil

关键词: Lepidoptera;    parasitoids;    biology;    temperature;   

DOI  :  10.1590/S0073-47212004000300016

来源: SciELO

【 摘 要 】

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.

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