1976년 본해충을 실내사육하면서 얻어진 결과는 다음과 같다. 1. 한 마리당 산란수는 1202.0±150.6개 산란전기간 9.0±0.8일 산란기간 13.3±1.2일 산란후기간은 1.7±0.2일이었고 산란시기는 일몰후였다. 2. 유충은 5령형과 6령형으로 구분할 수 있었고 5령형의 유충기간은 15.36±1.59일 용기간 7.82±1.01일 6령형의 유충기간은 16.92±1.08일 용기간 8.23±1.09일 이였으며 난기간은 2일 자성충 수명은 21.29±3.15일 웅성충은 19.14±2.47일이였다. 3. 령기별 두건은 5령형 2.77~21.89mm 5령형이 2.78~22.38mm였다. 4. 두건을 logarithum으로 변형했을 때 령기에 따른 두건의 증가는 5령형이 log y=0.228χ+0.228(r=0.997), 6령형이 log y=0.182χ+0.259(r=0.999)로 표현되어 고도의 정상관 관계였다.

This experiment was carried out to investigate the life history of the Three spotted plusia (Chrysodeixis agnata Staudinger) in the laboratory in 1976. (1) Female deposited 1202±150.6 eggs during the oviposition period which was 13.3±1.2 days. (2) Especially, larvae were distinguished with 5-instar type and 6-instar type. The egg period was 2 days and adult longevity was 21.29±3.15 days for female and 19.14±2.47 days for male. Larval period and pupal period were 15.36±1.59,7.82±1.01 days for the 5-instar type and 16.92±1.08,8.23±1.09 days for the 6-instar type. (3) Width of head capsule of the 5-instar type was 2.77~2189mm and this of the 6-instar type was 2.78~22.38mm. (4) A highly significant correlation was recognized between the log-width of head capsule and the number of instar.

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