Dormancy in the strawberry leafroller (Lepidoptera: Tortricidae)

J. J. Obrycki, A. D. Gabriel, C. J. Orr, J. W. Bing

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A 2-yr study of strawberry leafroller, Ancylis comptana (Froelich), populations in central Iowa showed that short daylengths and low temperatures maintain diapause during autumn and that this autumnal diapause ends without a specific cue by the end of December. The completion of diapause does not require chilling. The postdiapause developmental rate of A. Comptana is linearly related to temperatures between 14 and 30°C; adult emergence requires 154 degree-days (DD) above a lower thermal threshold (t) of 10.5°C. Field cage studies demonstrated that 50% emergence of adult A. Comptana from overwintering larvae can be predicted accurately based upon the accumulation of approximately 150 DD > 10°C.

Original languageEnglish
Pages (from-to)932-936
Number of pages5
JournalEnvironmental Entomology
Issue number6
StatePublished - Dec 1 1990

Bibliographical note

Funding Information:
Catherine Tauber, Cornell University, Ithaca, N.Y., for their critical review of this manuscript. This research was supported by a grant (#88-13) from the Leopold Center for Sustainable Agriculture, Iowa State University, and an Iowa State University Research Grant funded through the Iowa State University Achievement Foundation. This is Journal Paper J-13722 of the Iowa Agriculture and Home EconomicsExperiment Station, Ames, Iowa. Project 2755.

Publisher Copyright:
© 1990 Entomological Society of America.


  • Ancylis comptana
  • Diapause
  • Dormancy
  • Insecta

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Insect Science


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