Heat Requirements for the Development of the Black cutworm, Agrotis ipsilon (Hüfnagel) (Noctuidae: Lepidoptera) | ||
| Egyptian Academic Journal of Biological Sciences. A, Entomology | ||
| Article 13, Volume 2, Issue 1, June 2009, Pages 117-124 PDF (399.93 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eajbsa.2009.15502 | ||
| Authors | ||
| Hassan F. Dahi1; Walaa G. Ibrahem2; Mohsen M. Ali2 | ||
| 1Plant Protection Research Institute, Agricult. Research Center, Dokki, Giza, Egypt | ||
| 2Plant Protection Research Institute, Agricult. Research Center, Dokki, Giza, Egypt. | ||
| Abstract | ||
| The present investigation aimed to study the effect of three constant temperatures (20, 25, and 30°C) on the development of the black cutworm, Agrotis ipsilon (Hüfnagel). The incubation period, larval duration, pupal duration, pre-oviposition period and duration of generation were estimated. The time required for development was decreased as the temperature increased from 20 to30 °C. The lower threshold temperatures (t0) was 11.49°C for eggs, 10.63 °C for larvae, 9.83 °C for pupae, 11.06 °C for pre-oviposition period and 10.53 °C for generation. The average thermal requirements needed for completing the development were 51.3, 303.5, 183.5, 38.1 and 575.3 degree-days for eggs, larvae, pupae, pre-oviposition period and generation, respectively. | ||
| Keywords | ||
| Agrotis ipsilon – Heat Requirements – Degree Days; Lower threshold (t0); prediction | ||
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