Biology and Life Table Studies of Dirhinus anthracia Walker (Hymenoptera:Chalcididae) a Parasitoid of Exorista bombycis Louis (Diptera:Tachinidae) at Various Constant Temperatures

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Authors

  • Karnataka State Sericulture Research and Development Institute, Thalaghattapura, Bangalore 560 062, Karnataka ,IN
  • Karnataka State Sericulture Research and Development Institute, Thalaghattapura, Bangalore 560 062, Karnataka ,IN
  • Bangalore University, Jnana Bharathi, Bangalore 560056, Karnataka ,IN

DOI:

https://doi.org/10.18311/jbc/1998/15069

Keywords:

Dirhinus anthracia, Exorista bombycis, Parasitoid, Temperature, Uzi Fly.

Abstract

Biology of Dirhinus anthracia Walker was investigated on its natural host, Exorista bombycis Louis at six constant temperatures (10-35°C). The lower threshold for development for male and female was 10.5° and 11°C, respectively. Entire development from egg to adult required 475.05 and 550.96 day degrees, respectively for male and female. Sex ratio was in favour of female at all temperatures except 35°C where a reversal of sex ratio was observed. Reduction in doubling time and generation time was observed as temperature increased.