COOLING CERTAIN LEPIDOPTEROUS INSECT EGGS IN RELATION TO THEIR HATCHABILITY | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 12, Volume 76, Issue 3, September 1998, Page 993-1002 PDF (2.04 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1998.358468 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| SAADIA A. ABDEL-SAMEA; METWALLY F. EL-METWALLY; RAHIM A. MARZOUK | ||||
| Plant Protection Research Institute, Agricultural Research Centre, Giza, Egypt | ||||
| Abstract | ||||
| Different ages of the pink stalk borer, Sesamia cretica (Led.); Eu-ropean corn borer, Ostrinia nubilalis (Hubn.), cotton leaf worm, Spodop-tera littoralis (Boisci.) and greasy cutworm, Agrotis ipsiion (Hufn.) eggs were cooled at 5±0.5, 10±0.5 and 15±0.5°C for different periods to evaluate their viability under these conditions. The following results were achieved: - Cooling eggs of the considered insects delayed hatching in most cases and decreased their viability_ - It could successfully keep Sesamia eggs, 2 days old, for 5, 9 and 11 days at the three mentioned temperatures, respectively without affecting their viability (100%). - Ostrinia eggs, aged 2-3 days, could be kept at 10±0.5°C for about 2 days with 88_6 - 100_0% viability. At higher temperature, eggs of 3 days old were successfully kept for a longer period (9 days) with a complete viability. Agrotis eggs (2 days old) could be kept for 10, 3 and 2 days with their normal viability at three cooling degrees, respectively. Spodoptera eggs of the same age were kept for relatively shorter periods; 1, 4 and 4 days at these degrees with their complete viability. | ||||
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