Page 8 - Lyle and Louise Entomology Kit Climatological Data Analysis Tutorial
P. 8
Cumulative degree-hours for each life stage:
Species B
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 25 37 31 60 124 286
Deg Hrs 525 777 651 1260 2604 6006
Cum. 525 777+525 651+1302 1260+1953 2604+3213 6006+5817
Deg Hrs = 1302 = 1953 = 3213 = 5817 = 11823
Adult degree-hours = ∑ degree hours at each stage
= cumulative degree hours
= 11823
