Research and IPM

Phenology Model Database

Tomato Pinworm

Scientific name: Keiferia lycopersicella

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 2

Lin, S. Y. H., and J. T. Trumble. 1985. Influence of temperature and tomato maturity on development and survival of Keiferia lycopersicella (Lepidoptera: Gelechiidae). Environ. Entomol. 14: 855-858.

Location of study: South Coast Field Station, California (greenhouse studies)

Developmental threshold

Lower:	50.4°F	(10.2°C)
Upper:	95.0°F	(35.0°C)

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

Degree-day accumulations required for each stage of development

Host: Tomato	DD (°F)	DD (°C)
Eggs:	163.6	90.9
Larvae (L1 + L2 = Blotch leafminer):	198.2	110.1
Larvae (L3 + L4 = Tentiform leafminer) :	216.4	120.2
Pupae:	239.6	133.1
Generation time (egg to adult):	817.7	454.3

Model 2 of 2

Weinberg, H. L., and W. H. Lange. 1980. Developmental rate and lower temperature threshold of the tomato pinworm. Environ. Entomol. 9: 245-246.

Location of study: Davis, California (laboratory studies)

Developmental threshold

Lower:

49.1°F

(9.5°C)

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

Degree-day accumulations required for each stage of development

Host: Tomato	DD (°F)	DD (°C)
Eggs:	166.9	92.7
Larvae:	393.8	218.8
Pupae:	260.3	144.6
Generation time (egg to adult):	821.0	456.1