• Korean journal of applied entomology
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• v.28 no.1
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• pp.28-31
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• 1989

Lariophagus distinguendus,an ectoparasitoid of rice weevil, laid its eggs exclusively on the third and fourth larvae, with the preference for the fourth larva. The sex ratio of the pa¬rasitoid can be regulated by the female parasitoid on the basis of the host size available at the time of oviposition.

• Journal of the Korean Society of Tobacco Science
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• v.21 no.2
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• pp.188-194
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• 1999

Cigarette beetle, Lasioderma serricorne F.(Coleoptera : Anobiidae), is one of the most serious insect pest of stored leaf tobacco in Korea. The first adults of their ecto-parasitic hymenoptera, Lariophagus ditinguendus F. (Hymenoptera: Pteromalidae), were emerged in late June in 1992, in early May in 1993 and 1995, in late May in 1994 and 1996. This parasitic hymenoptera had two peak times of adults emergence. The first one was from late June to early July and the 2nd peak time in the Suwon area occurred from late August to early September in 1993, 1994 and 1996, and late September in 1992 and 1995.

• Korean journal of applied entomology
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• v.34 no.3
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• pp.278-286
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• 1995

Adaptation of Anisopteromalus calandrae maintained on rice weevil (Sitophilus oryzae) to an alternative host, adzuki bean weevil (Callosobruchus chinensis) was studied. A. calandrae required two generations to adapt to the adzuki been weevil. Through the adaptation, the mean($\pm$SEM) life span of th females became shorter $8.7\pm$1.3 days at the first generation to $6.9\pm$0.6 days at the second generation. Number of eggs laid per female increased from 29.3$\pm$7.7 to $68.2\pm$6.5. Consequently intrinsic rate of natural increase and net reproductive rate were increased. The generation time and population doubling time were decreased. The searching efficiency based on functional and numerical response of A. calandrae to the adzuki bean weevil were similar to each other, but the coefficient of variation decreased with the generation, suggesting that searching efficiency became stable when the parasitoid adapted to adzuki bean weevil. No time lag was required for A. calandrae adapted to the adzuki bean weevil to adapt again to th rice weevil and the searching efficiency of the parasitoid remained on a similar level for the first generation on.