Table 1.
Stage-specific development rate as function of daily mean temperature.
| Process | Life stage | Development rate (y = f(T)) | R2 |
|---|---|---|---|
| Egg incubation | Egg–1st instar | y = −0.9843T + 33.438 | 0.88 |
| Development | 1st instar–2nd instar | y = −0.3728T + 14.68 | 0.84 |
| 2nd instar–3rd instar | y = −0.6119T + 25.249 | 0.81 | |
| 3rd instar–4th instar | y = −0.3986T + 17.602 | 0.77 | |
| 4th instar–5th instar | y = −0.4408T + 19.036 | 0.82 | |
| Emergence | 5th instar–Adult | y = −0.5332T + 24.147 | 0.90 |
P < 0.01 for all life stages.
T, daily mean temperature (°C); y, percent development per day for transition through that life stage; e.g., if y = 0.2 then the individual has 20% probability of transition to the next life stage.