Diapause induction in eastern North American populations of Propylea quatuordecimpunctata and Hippodamia variegata (Coleoptera: Coccinellidae)

Experiments examined the effect of photoperiod on the expression of adult diapause in North American populations of two Palearctic ladybird beetle species, Propylea quatuordecimpunctata and Hippodamia variegata.

Comparative data for the reproductive responses to different photoperiod conditions for H. variegata were taken from Obrycki (2018). Additionally, comparisons of responses to the four photoperiods between P. quatuordecimpunctata from Jefferson County, NY, USA to P. quatuordecimpunctata from Montreal, Quebec, Canada were also conducted. Data for the Montreal, Quebec, Canada population are from Obrycki et al., (1993).

Two Data sets are included:

(1) Pre-oviposition period (days) as a measure of induction and duration of adult diapause in P. quatuordecimpunctata and H. variegata. (Data for Supplemental Table S8 in Jones et al 2024)

(2) Pre-oviposition period (days) as a measure of induction and duration of adult diapause in P. quatuordecimpunctata from Jefferson County, New York, USA and P. quatuordecimpunctata from Montreal, Quebec, Canada. (Data for Supplemental Table S9 in Jones et al 2024.

Hippodamia variegata were collected in August 2015.

Propylea quatuordecimpuntata were collected in August 2019.

The Canadian population of Propylea quatuordecimpuntata was collected in summer 1989.

Adult Hippodamia variegata and Propylea quatuordecimpunctata collected from Jefferson County, New York, USA (43.98°N, 75.91°W).

Adult Propylea quatuordecimpuntata were collected from Montreal, Quebec, Canada (45.50°N, 73.57°W)