Research and IPM

Phenology Model Database

Oriental Fruit Moth

Scientific name: Grapholita molesta

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

Croft, B. A., M. F. Michels, and R. E. Rice. 1980. Validation of a PETE timing model for the oriental fruit moth in Michigan and central California (Lepidoptera: Olethreutidae). Great Lakes Entomol. 13: 211-217.

Location of study: Parlier, California (field studies)

Developmental threshold

Lower:	45.0°F	( 7.2°C)
Upper:	90.0°F	(32.2°C)

Method of calculation:	Single Sine
Cutoff method:	Horizontal

Degree-day accumulations required for each stage of development

Start date: January 1

Model 2 of 2

Rice, R. E., C. V. Weakley, and R. A. Jones. 1984. Using degree-days to determine optimum spray timing for the oriental fruit moth (Lepidoptera: Tortricidae). J. Econ. Entomol. 77: 698-700.

SEE ALSO: Weakley, C. V., F. G. Zalom, and R. E. Rice. 1984. Monitoring oriental fruit moth development with degree-days. U. C. Div. Agr. Sci. Publ. #7157

UC IPM Pest Management Guidelines: Peach and Nectarine, UC DANR Publication 3339

Location of study: Parlier and Yuba City, California (field studies)

Developmental threshold

Lower:	45.0°F	( 7.2°C)
Upper:	90.0°F	(32.2°C)

Method of calculation:	Single Sine
Cutoff method:	Horizontal

Degree-day accumulations required for each stage of development

Host: Peaches
Biofix: First male moth trapped	DD (°F)	DD (°C)
Pre-egglaying adults + Eggs:	200.0	111.1
Larvae:	387.0	215.0
Pupae:	378.0	210.0
Generation time (adult to adult):	965.0	536.1
Biofix: Start of second flight (usually early May)
Time to treat:	500.0 - 600.0	278.0 - 333.3