Abstract
The flesh fly adults of temperate colonies, Boettcherisca peregrina, lay larvae destined for non-diapause and diapause under long and short days, respectively and mature larvae destined for diapause enter diapause at the pupal stage. Mature larvae are inhibited pupariation with water immersion treatment, and the pupariation takes place after transfer from the immersed to the dry conditions. We found that 74% of the mature larvae entered diapause, when the larvae destined for non-diapause were treated with water immersion under short days at 20℃ for 13 days. Further, 60% of progeny of adult experienced diapause at pupal stage entered diapause with water immersion treatment under the same condition. Furthermore, when the progeny of diapause terminated adult fly experienced only short days was exposed only short days for all larval period, they entered diapause at a rate of 22〜23% with or without water immersion treatment. From these results, we conclude that diapause incidence on B. peregrina larvae may be dominated by short days signal exposed after larviposition, but adults have a same effect on progeny to diapause or non-diapause pupae.
