DEGREE DAY REQUIREMENT FOR DEVELOPMENT OF THE BLACK CUTWORM, AGROTIS IPSILON (H ufn.) (LEPIDOPTERA: NOCTUIDAE). | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 7, Volume 79, Issue 2, June 2001, Page 445-452 PDF (1.93 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2001.318610 | ||||
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| Authors | ||||
| MEDHAT I. ABDIN; MORTADA A. EISSA | ||||
| Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| Studies were carried out to show the effect of rearing regimes combined with three different temperatures on the rate of development of Agrotis ipsilon. Data obtained from these experiments revealed that the degree days required for the immature stages differed according to temperature or type of food, which were 208.4, 228.5, 229.1 and 267.5 at 22°C, 27°C, 30°C and 35°C when larvae were fed on castor oil bean leaves and it was 176.3, 226.05, 226.5 and 272.7 at the previous temperatures when larvae were fed on clover (berseem) leaves. Also, the median developmental rate was between 0.019 to 0.03 at the same temperatures, but results showed that the rate of development at the lower temperature when fed on berseem leaves was higher compared with those fed on castor oil bean leaves according to the different contents of the two regimes. | ||||
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