Abstract
Hatched-larvae of the mulberry longicorn beetle, Apriona germari Hope, collected from mulberry fields were reared on artificial diet at 25$^{\circ}$C with 14 h light and 10 h dark to study the larval developmental characteristics. Artificial diet developed for rearing silkworm was used with minor modification adding mulberry branch powder. In case of artificial diet rearing, the head width of larval instar from the I st to the 12th instars was ranged from 0.12 to 0.69cm, and growth rate of each instar was significantly high between the I st and the 2nd instars. In addition, the weight of the 8th instar larvae was increased approximately 176-fold in comparision with that of the 1st instar larvae. Larval duration of each instar took long with larval developmental stages, and that of the 1st to the 9th or the 12th instars was 186.03 or 304.58 days, respectively. The survival rate of larvae was 40.8% by the 8th instar. The pupation rate was approximately 32.4%. Furthermore, although pupation stage was broadly appeared from the 7th to the I lth instars, pupation was majorly observed at the 8th and the 9th instars.
실내 인공사료육에 의한 뽕나무하늘소(Apriona germari Hope) 유충의 발육특성을 조사하기 위하여 야외 뽕밭에서 채집된 뽕나무하늘소 부화유충을 14L:10D 광조건의 $25^{\circ}C$ 항온기에서 애누에용 인공사료와 뽕나무 가지 분말을 동량비로 석은 인공사료에 의하여 실내사육한 결과, 유충의 1령에서 12령까지의 두폭 범위는 0.12~0.69 cm 내에 있었고 각 영기의 성장비는 1령과 2령간이 가장 컸다. 체중의 증가에 있어서 1령에 비해 8령의 경우는 약 176배, 12령의 경우와는 약 354배의 성장도 차이를 보였다. 각 영별 경과일구는 영이 진전될수록 경과일수가 길어졌으며 1령에서서 9령까지의 경과일수는 186.03일, 12령까지의 경과일수는 304.58일이었다. 인공사료육에 의한 1세대 유충 생존율은 3령기에 걸쳐 약 45%로 매우 낮았으나 그 이후 안정되어 8령까지의 유충 생존율은 40.8%이었다. 용화율은 32.4% 이었으며, 용화 시기는 7령에서부터 11령에 걸쳐 나타났지만, 8령과 9령째가 대부분이었다.
