Preimaginal development rates (egg, larval, pupal, and egg to adult) for the strawberry leafroller, Ancylis comptana (Froelich), were determined at six constant temperatures: 14, 18, 22, 26, 30, and 34°C (±2°, 16:8 [L:D]). Total development was fastest at 30° (22.3 ± 0.2 d) and 26°C (28.1 ± 0.3 d); 108.5 ± 9.6 d were required for total development at 14°C. Survival was >75% between 18 and 30°C, but decreased to 31% at 14 and 34°C. Based on a linear model of the temperature-developmental rate relationship, K and t values were 78 DD (degree-days) above 10.3° for eggs, 254 DD above 9.7° for larvae, 100 DD above 10.9° for pupae, and 431 DD above 10.2°C for total preimaginal development. A four-parameter biophysical model of the temperature-development relationship indicated that high temperature inhibition occurred from 29 to 33°C for the preimaginallife stages. Field development of second- and third-generation egg and larval stages was predicted within three calendar days. Management of the strawberry leafroller is greatly facilitated by predicting egg hatch to synchronize control measures with the first instars, which do not exhibit leaf-rolling behavior.
|Number of pages||6|
|State||Published - Dec 1 1990|
Bibliographical noteFunding Information:
We thank Mark F. Bryan, Iowa State University, and Hex A. Bastian, Hendricksen Company-The Care of Trees, Chicago, for statistical asSistance. We thank Leslie C. Lewis, USDA-ARS, and Larry P. Pedigo, Iowa State University, for their critical review of the manuscript. This research was supported by grant 88-13 from the Leopold Center for Sustainable Agriculture, Iowa State University and an Iowa State University Research Grant, through the Iowa State University Achievement Foundation. This is journal paper J-13426 of the Iowa Agriculture and Home Economics Experiment Station, Ames; project 2755.
© 1990 Entomological Society of America.
- Ancylis comptana
- Integrated pest management
- Temperature-development relationship
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Insect Science