| J Ferdous,W Islam1* and S Parween
Institute of Biological Sciences, Rajshahi University, Rajshahi 6205, Bangladesh
Abstrsact
Insect growth regulators (IGRs), triflumuron at concentrations of 0.001, 0.05 and 0.1ppm, and diflubenzuron at concentrations of 0.005, 0.05 and 0.01ppm in presence of 2-, 4- and 8 pairs of a preda-tor Xylocoris flavipes Reuter, significantly (p<0.001) reduced the population of Tribolium castaneum (Herbst) in 60 days exposure period. The PRC values ranged from 55.3 (0.005ppm of diflubenzuron with 2 pairs of X. flavipes) to 84.3 (0.1 ppm of triflumuron with 8 pairs of X. flavipes). IGRs have re-duced the predator’s population up to maximum as 56.6% compared to the control at 0.1ppm of tri-flumuron when 2 pairs of predators were introduced during the same exposure time.
Key words: T. castaneum, X. flavipes, Predator, Insect Growth Regulator, Triflumuron, Diflubenzuron
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