Takeda, M. 2021 Effect of changing temperatures from the spawning and egg stages to the emerging adult stage on the induction of reproductive diapause in females of Pseudaulacaspis pentagona (Hemiptera: Diaspididae). Applied Entomology and Zoology doi.org/10.1007/s13355-021-00757-3
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Notes: Overwintering females in the third generation of Pseudaulacaspis pentagona (Targioni Tozetti) (Hemiptera: Diaspididae) entered reproductive diapause with undeveloped ovarian eggs. Ovarian development in females collected before the winter solstice was retarded, but development proceeded normally thereafter. Neither length of photoperiod nor changing photoperiods affected the induction of reproductive diapause. Reproductive diapause of P. pentagona was induced when the temperature decreased to around 20 °C from the high temperature conditions of the previous generation spawning and current generation egg stages. This paper will discuss the seasonal adaptations of P. pentagona in relation to regional climate conditions and the voltinism of two or three generations per year.
