Research and IPM
Phenology Model Database
Aphytis melinus
Scientific name: Aphytis melinus (a parasite of California red scale)
Phenology models
predict timing of events in an organism's development.
For many organisms which cannot internally regulate their own temperature,
development is dependent on temperatures to which they are exposed in the environment.
Information in this database comes from published articles.
It may be used in conjunction with field monitoring and a
degree-day calculator.
Note: Before using a model that was not field tested in your location,
you should test the model
for one or more seasons under your conditions to verify
that it will work for you.
Model 1 of 1
Yu, D. S., and R. F. Luck. 1988. Temperature-dependent
size and development of California red scale (Homoptera: Diaspididae) and its
effect on host availability for the ectoparasitoid, Aphytis melinus DeBach
(Hymenoptera: Aphelinidae). Environ. Entomol. 17: 154-161.
Location of study: Riverside, California (laboratory studies)
Developmental thresholds
| Lower: |
49.5°F |
( 9.7°C) |
| Upper: |
86.0°F | (30.0°C) |
| Method of calculation: | Max-min (UC IPM recommends Single Sine) |
| Cutoff method: | not specified (UC IPM recommends Horizontal) |
Degree-day accumulations required for each stage of development
| Host: California Red Scale | DD (°F) | DD (°C) |
|---|
| Generation time (egg to adult): | 407.7 | 226.5 |
|
