Effect of juvenile hormone analogue on ovarian development of the reproductive-diapausing parasitic fly, Melinda pusilla

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  • 成虫生殖休眠中のウヅキイエバエモドキ, Melinda pusilla の卵発達に対する幼若ホルモン様物質の影響
  • 成虫生殖休眠中のウヅキイエバエモドキ,Melinda pusillaの卵発達に対する幼若ホルモン様物質の影響〔英文〕
  • セイチュウ セイショク キュウミンチュウ ノ ウズキイエバエモドキ Melin

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Abstract

The effects of juvenile hormone analogue (methoprene, JHA) on ovarian development of the reproductive-diapausing parasitic fly, Melinda pusilla (Villeneuve) (Diptera : Calliphoridae), were investigated. The ovarian development of reproductive-diapausing females in the early stage of overwintering was accelerated by JHA treatment dose-dependently from the pre-vitellogenic stage to the vitellogenic stage, although the effect of a single dose (1μg) of JHA treatment was not enough to terminate the reproductive diapause. Two or 4 repeats of JHA treatments (1μg/one dose) at 5 days' intervals induced 100% egg maturation within 10 to 20 days after the treatment. In fermales in the middle stage of overwintering, a single dose of JHA treatment accelerated follicle development but did not accomplish egg maturation. In the late stage of overwintering, in which 80% of the females had matured eggs in accordance with the reproductive diapause termination, JHA treatment enhanced moving of the matured eggs into the uterus. These results suggest that JHA works dose-and stage-dependently on the termination of reproductive diapause in overwintering M. pusilla.

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