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Atul C Sarker1,W Islam 2* and Selina Parween3
1Department of Zoology, Carmaichel College, Rangpur, Bangladesh
2Institute of Biological Sciences, University of Rajshahi, Rajshahi, Bangladesh
3Department of Zoology, University of Rajshahi, Rajshahi, Bangladesh
Abstract
The biological parameters of predator Xylocoris flavipes (Reuter)
was observed from experiments when they were reared on specific host-stages like eggs,
larvae and pupae of Cryptolestes pusillus (Schon.), under laboratory conditions.
The minimum developmental time of X. flavipes was found 12 ± 1.15 days when preyed on host
pupae, but maximum time of 22.06 days needed when it preyed on 2nd instar larvae of the host.
The maximum longevity of X. flavipes females was 31 ± 1.15 days but minimum 14 ± 1.15 days
when fed on 2nd instar larvae while the highest was 12 ± 1.15 days but lowest was 6 ± 0.58
days when fed on pupae of C. pusillus. The predator consumed a large number of host
eggs male: 16.33, female: 20.67) but minimum of host pupae (male: 4.33, female: 5.67).
The survivability of male adults was higher than female adults. The females are larger in size
than male. The results indicated that the number of X. flavipes was significantly varied
among the life stages of the host. This study summarize the importance of life stages of
C. pusillus for mass utilization of predator, X. flavipes.
Key words: Host-stage specific, biological parameters, X. flavipes
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* - Corresponding Author
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