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Table 1 Temperature-dependent embryonic and early larval development in Callosobruchus maculatus: median transition times (estimated using logistic regression analysis) and calculated durations of stages

From: Stagewise resolution of temperature-dependent embryonic and postembryonic development in the cowpea seed beetle Callosobruchus maculatus (F.)

Developmental stage Median time of transition to next stage at five incubation temperatures, h from oviposition Stage duration at five incubation temperatures, h
19.8 °C 22.7 °C 25.6 °C 28.6 °C 31.7 °C 19.8 °C 22.7 °C 25.6 °C 28.6 °C 31.7 °C
Early cleavages up to 256 nuclei 14.10 10.25 6.28 5.17 4.11 14.10 10.25 6.28 5.17 4.11
Late cleavages and germ band formation 34.37 24.21 18.52 14.15 12.42 20.27 13.96 12.24 8.98 8.32
Germ band extension 54.63 39.16 28.03 21.09 17.52 20.26 14.95 9.51 6.94 5.10
Germ band retraction 107.90 75.33 57.06 41.63 34.51 53.27 36.18 29.03 20.54 16.99
Dorsal closure 167.85 115.20 85.78 64.89 54.66 59.95 39.87 28.73 23.26 20.15
  19.7 °C 22.6 °C 25.6 °C 28.8 °C 31.6 °C 19.7 °C 22.6 °C 25.6 °C 28.8 °C 31.6 °C
Final morphogenesis 211.32 134.54 105.34 80.57 68.81 43.47 19.34 19.56 15.69 14.15
Sclerotization 235.74 157.76 118.68 89.66 78.59 24.42 23.22 13.33 9.08 9.78
Hatching 269.90 177.72 130.58 99.12 87.09 34.15 19.96 11.91 9.47 8.50
Boring into the seed 351.53 229.27 172.34 129.15 112.20 81.63 51.55 41.76 30.03 25.12
  1. Temperature values in bold refer to actual incubation temperatures which slightly differed from the set values of 20, 23, 26, 29, and 32 °C