Abstract

하늘소류 기생천적으로 알려진 개미침벌의 발육, 산란과 우화, 성비를 조사하기 위해 기주곤충인 솔수염하늘소, 북방수염하늘소, 울도하늘소의 노숙유충과 번데기를 먹이로 제공하였다. 개미침벌 암컷의 발육은 솔수염하늘소 유충과 번데기에서 <TEX>$29.2{\pm}0.93$</TEX>일, <TEX>$25.1{\pm}0.47$</TEX>일, 북방수염하늘소 유충과 번데기에서는 <TEX>$27.1{\pm}0.41$</TEX>일, <TEX>$26.0{\pm}0.69$</TEX>일, 울도하늘소 유충과 번데기에서는 <TEX>$26.3{\pm}0.38$</TEX>일, <TEX>$31.2{\pm}0.24$</TEX>일이 각각 소요되었다. 개미침벌 성충은 솔수염하늘소 번데기를 기주로 하였을 때, 용화된 이후 암컷은 <TEX>$12.9{\pm}0.2$</TEX>일, 수컷은 <TEX>$11.9{\pm}0.2$</TEX>일 후 우화하였고, 수컷의 발육기간은 암컷보다 1일 정도 더 빨랐다. 기주곤충에 대한 산란율은 다른 기주곤충에 비해 북방수염하늘소 유충과 번데기에서 98.6%와 97.5%로 제일 높았으며, 우화율도 북방수염하늘소의 유충과 번데기에서 90.1%와 87.3%로 제일 높았다. 우화한 개미침벌의 성비는 대략 10:1의 비로 암컷이 우세하였고, 기주곤충에 대한 첫 산란은 북방수염하늘소 번데기에서 가장 짧아 우화한지 <TEX>$4.6{\pm}0.1$</TEX>일에 산란하였다. 기주곤충의 유충에 개미침벌 암컷 성충을 3마리 접종하였을 때 산란수도 북방수염하늘에서 암컷 1마리당 <TEX>$62.7{\pm}2.5$</TEX>개로 가장 많았다. This study was performed to investigate the immature development period, fecundity, emergence rate and sex ratio of Sclerodermus harmandi against different host insects, Monochamus alternatus, M. saltuarius and Psacothea hilaris. Full grown larvae and pupae of host insects were provided with foods. The mean larval period of S. harmandi female was <TEX>$29.2{\pm}0.93\;and\;25.1{\pm}0.47$</TEX> days in larvae and pupae of M. alternatus, <TEX>$27.1{\pm}0.41\;and\;26.0{\pm}0.69$</TEX> days in M. saltuarius, and <TEX>$26.3{\pm}0.38\;and\;31.2{\pm}0.24$</TEX> days in P. hilaris, respectively. S. hilaris adults were emerged at <TEX>$12.9{\pm}0.2$</TEX> days in female and <TEX>$11.9{\pm}0.2$</TEX> days in male after pupation when hosted M. alternatus pupa. Development period in male showed shorter one day than in female. Success rate of oviposition against different hosts was higher as 98.6 and 97.5% on full grown larva and pupa of M saltuarius. Emergence rate was higher as 90.1 and 87.3% on M. saltuarius larvae and pupae. Sex ratio of emerged S. harmandi adults was approximately 10:1 (Female : Male), females showed higher emergence rate than males. The period until first oviposition after emergence in S. harmandi female was the shortest in <TEX>$4.6{\pm}0.1$</TEX> days on M. saltuarius pupa. When three females of S. harmandi were inoculated on M. saltuarius larva, the number of laid eggs was the highest <TEX>$62.7{\pm}2.5$</TEX> per female.

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