Page 7 - Lyle and Louise Entomology Kit Climatological Data Analysis Tutorial
P. 7
Cumulative degree-hours for each life stage:
Species A
Lab Procedure 2, Step 4: By adding all the degree hours for each of the six life stages together, you
calculate the cumulative degree hours required for an adult fly to develop at 21°C.
Temp °C Egg 1 Instar 2 Instar Feeding 3 Migrating Pupa
st
rd
nd
Instar 3 Instar
rd
21 21 31 26 50 118 240
Deg Hrs 441 651 546 1050 2478 5040
Cum. 441 651+441 546+1092 1050+1638 2478+1638 5040+5166
Deg Hrs = 1092 = 1638 = 2688 = 5166 = 10206
Adult degree-hours = ∑ degree hours at each stage
= cumulative degree hours
= 10206
