Research and IPM

Phenology Model Database

Transverse Lady Beetle

Scientific name: Coccinella transversoguttata richardsoni

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

Obrycki, J. J., and M. J. Tauber. 1981. Phenology of three Coccinellid species: thermal requirements for development. Ann. Entomol. Soc. Amer. 74: 31-36.

Location of study: Ithaca, New York (laboratory studies)

Developmental threshold

Lower:

54.0°F

(12.2°C)

Method of calculation: not specified (UC IPM recommends Single Sine)

Degree-day accumulations required for each stage of development

Host: Pea and green peach aphids	DD (°F)	DD (°C)
Eggs:	67.9	37.7
Larvae:	225.5	125.3
Pupae:	94.3	52.4
Generation time (egg to adult):	387.7	215.4