Research and IPM

Phenology Model Database

Onion Thrips

Scientific name: Thrips tabaci

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.

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

Edelson, J. V., and J. J. Magaro. 1988. Development of onion thrips, Thrips tabaci Lindeman, as a function of temperature. SW Entomol. 13: 171-176.

Location of study: Weslaco, Texas (laboratory studies)

Developmental threshold

Lower:

52.7°F

(11.5°C)

Method of calculation: Single Sine

Degree-day accumulations required for each stage of development

Host: Green Onions	DD (°F)	DD (°C)
Egg:	140.4	78.0
Larva to adult:	180.4	100.2
Generation time:	323.3	179.6