8.8. Questions and Assignments to Lecture 8.
8.1 Insect development rate. Development of pea weevil (Bruchus pisorum) eggs was studied in the laboratory at constant temperatures (Smith, A.M. 1992. Environ. Entomol. 21:314-321):
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Temperature, C | Egg development time, days
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10.7 | 38.0
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14.4 | 19.5
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16.2 | 15.6
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18.1 | 9.6
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21.4 | 9.5
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23.7 | 7.3
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24.7 | 4.5
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26.9 | 4.5
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28.6 | 7.1
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- Plot development rate vs. temperature (use Excel)
- Use linear regression to estimate lower temperature threshold and degree days required for egg development.
- Average temperature in a sequence of days was:
15 20 25 20 15 10 15 10 15 20 15 20 15 10 15 20 25 20 15 20
- When do you expect eggs to hatch if they were laid on the first day?
(Note: ignore diurnal temperature change).
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