Research and IPM
Phenology Model Database
Orange Tortrix
Scientific name: Argyrotaenia citrana
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
Bettiga, L. J., H. Kido, and N. F. McCalley. 1992. Orange
Tortrix. IN: Grape Pest Management. 2nd. Edition. U.C. Div. Agr. Sci.
Publ. #4105.
Location of study: California (field studies)
Developmental threshold
| Lower: | 43.0°F | ( 6.1°C) |
| Upper: | 78.0°F | (25.6°C) |
| Method of calculation: | Single Sine |
|---|
| Cutoff method: | Horizontal |
|---|
Degree-day accumulations required for each stage of development
| Host: Grapes | DD (°F) | DD (°C) |
|---|
| Eggs: | 243.0 | 135.0 |
|---|
| Larvae: | 654.0 | 363.3 |
|---|
| Pupae: | 266.0 | 147.8 |
|---|
| Generation time (egg to adult): | 1163.0 | 646.1 |
| Pre-egglaying period: | 53.0 | 29.4 |
| Generation time (adult to adult): | 1636.0 | 908.9 |
|
| Start date: Date of lowest trap catch (late January to early February) |
| Optimum treatment timing: | 1000.0 | 555.6 |
|---|
|
| Start date: Date of lowest trap catch (early June) |
| Optimum treatment timing: | 1000.0 | 555.6 |
|---|
|
