The bionomic of Pales murina (Dip.: Tachinidae) as a parasitoid of ber moth, Thiacidas postica (Lep.: Noctuidae) in Boushehr province

Document Type : Research Paper

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Abstract

Tachinid parasitoids are important natural enemies of a number of destructive forest insect pests. Pales murina (Dip.: Tachinidae) is a solitary endoparasitoid of the ber moth Thiacidas postica (Lep.: Noctuidae) in south of Iran. Parasitoid longevity, reproduction rate and development stages were studied under laboratory conditions at 25° C, 55% RH and LD 16:8. Adults of P. murina were placed in a cage with food, water, honey and a ber branch as an oviposition site. P. murina was appeared about 15-25 days prior to the emergence of T. postica in nature. The flies mated immediately after emergence. The pre-oviposition, oviposition and post-oviposition periods lasted 23±5, 20±6 and 15±4 days, respectively. The eggs were usually laid singly on lower surface of the leaves with the avarage of 735 eggs per female. Parasitoids successfully developed on third to fifth host larval instars. The fourth and fifth larval instars of host are large enough to ingest whole eggs of P. murina. The larval period depend on their host larval period. The avarage larval period of the host were 16±3 and 30±6 in the fifth and the fourth larval instars, respectively. The avarage longevity of adult male and female was 33.8±3.2 and 54.4±3.2 days, respectively. After development, the larvae left the host body and made puparium near it. However, the larva of T. postica was able to complete development and pupate. The first oviposition of the second generation of T. postica began during November and December. The fly was observed on alternative hosts when T. postica was absent in nature. The average of prepupal parasitism during 3 years was 38% in May and 88% in January.
 
 

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References

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History

  • Receive Date: 18 July 2006
  • Revise Date: 07 June 2016
  • Accept Date: 06 August 2007

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