Influence of the Photoper iod and Tempera ture on Larva l Developmenta lPer iods of the Grea t Mormon Butterfly Papilio m em non L innaeus

The growth and development of larval of Papilio m em non were investigated under different photoperiodsand temperatures which could be controlled in the climate2box. The effects of photoperiod and temperature on larvaldevelopmental periods of Papilio m em non were very remarkable. At same temperature, larval developmental periodshad significant difference. At 20 ℃ and during daylength of 12～14 h, the larval developmental periodswere in thescope of 39. 3～48. 5 days, and the margin between of the longest and shortest periodswas 9. 2 days. At 25 ℃ andduring daylength of 11～15 h, larval developmental periodswere in the scope of 25. 4～36 days, and the margin between of the longest and shortest periodswas 10. 6 days. At 30 ℃ and during daylength of 11～15 h, larval developmental periodswere in the scope of 19. 6～29. 0 days, and the margin between of the longest and shortest periodswas 9. 6 days. At the same daylength, larval developmental periods became shorter when the temperature was rising. Under daylengthes of 12. 0, 12. 5, 13. 0, 13. 5 and 14. 0 h, the developmental threshold temperature of larvawere 13. 6, 13. 3, 9. 2, 12. 2, and 7. 5 ℃, the temperature effective thermal sum were 332. 7, 340. 5, 372. 1, 350. 9and 475. 4 degree-days. At certain extent, the developmental threshold temperature and temperature effective thermal sum of larva were affected by photoperiod.