光照时间和冷藏对桃小食心虫生长发育和繁殖的影响

研究了光照时间和冷藏对桃小食心虫各虫态生长发育和繁殖的影响.结果表明，随着光照时数的延长,各虫态历期基本呈缩短趋势，光照时间对幼虫滞育率影响最为明显，15 h滞育率最低，无论是光照延长还是缩短，幼虫滞育率都会明显增加.其它重要生命参数如单雌产卵量、幼虫体重、孵化率、脱出率和羽化率等最高点多集中在光照13～17 h，所以，桃小食心虫生长发育和繁殖的最佳光照时间为15 h左右.冷藏时间对蛹历期、成虫寿命和卵历期影响均不明显，但冷藏7 d后羽化率、单雌产卵量及孵化率均呈下降趋势，蛹和卵不易长时间低温存放.

Effects of illumination and cold storage on development and reproduction of Carposina niponensis

The study showed that with the prolongation of illumination, the development duration of Carposina niponensis was shortened. Illumination had most obvious influence on the larval diapause rate, which was the minimum under 15 h of illumination and increased when illumination was prolonged and shortened. Other important parameters such as fecundity, larval weight, hatching rate, leaving rate and emergence rate reached their peak when the illumination duration was 13 to approximately 17 h. Therefore, the optimal illumination duration for the development and reproduction of C. niponensis was about 15 h. The duration of cold storage had no significant influence on the duration of pupa, longevity of adult, and duration of egg. But, the emergence rate, fecundity, and hatching rate were reduced when the cold storage duration exceeded 7 days. Therefore, pupae and eggs should not be stored at low temperature for a long period.