Česká akademie zemědělských věd, Těšnov 17, 117 05 Praha 1
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| Česká akademie zemědělských věd, Těšnov 17, 117 05 Praha 1 |
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BARTEKOVÁ A., PRASLIČKA J.: The effect of amvient temperature on the development of cotton bollworm ( Helicoverpa armigera Hübner, 1808)
Článek : 54781 ; Vydáno : 7.1. 2007 ; Autor : Dr. Marcela Braunová
Plant Protect. Sci., 42 (2006): 135–138
Abstract
Dependence of individual development stages of cotton bollworm, Helicoverpa armigera, on ambient temperature was studied in laboratory conditions. Temperature-controlled chambers at constant temperatures of 20, 25 and 30°C were used, and the thermal thresholds were established by means of linear regression. The following temperature limits were determined: the lower thermal threshold for the development of H. armigera eggs is 14.8°C, that for larvae is 11.3°C, and that for development of pupae is 8.2°C. The thermal constant for the development of eggs is 64.1 day-degrees, that for larvae is 344.8 day-degrees, and that for the development of pupae is 222.2 day-degrees. The lower thermal threshold for total development of Helicoverpa armigera is 11.5°C and the thermal constant is 625.0 day-degrees.
Keywords: cotton bollworm; Helicoverpa armigera; development; thermal constants; temperature
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