- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Effect of Different Temperatures On some Biological Fields Of Saw-Toothed Grain Beetle | ||
| Journal of Basrah Researches (Sciences) | ||
| Article 1, Volume 33, Issue 4, 2007, Pages 7-13 PDF (0 K) | ||
| Authors | ||
| Muntha J. K; Thria A. Al-Saadee; Nasser H. Al-Dosary | ||
| Abstract | ||
| This research aimed to study the effect of different temperatures (25, 30, 35, 40)oC under relative humidity (50%±5) on some biological fields of Saw-Toothed Grain Beetle Oryzaephilus surinamensis which found date palm Cv. Hellawi. The results showed that the longest time for eggs production was 18.67 days 25 oC, while the shortest time was 9.33 days at 30 oC. in relative to produced eggs number, the more eggs number was 80.67 eggs t 35 oC while the less number was 15.67 eggs at 25 oC it was found that the longest egg incubation time is 10 days at 25 oC , while the shortest time is 4 days at 40 oC. The study showed also that the highest percentage egg hatch was 78.67% at 30 oC, while the lowest percentage of hatch was 23.5% at 25 oC. in term of effect of temperature on development of larvae and pupa phase, the study recorded the longest duration for development of larvae and pupa at 25 oC which was 31.67 days for larvae phase and 13.33 days for pupa phase, while shortest duration development occur at 40 oC which was 21.67 days and for pupa phase occur at 35 oC which was 5.33 days. The result showed also that the longest generation time recording at 25 oC which was 78.33 days, while the shortest generation time was 46 days at 40 oC. The research studied the effect of temperature on number of released individuals of saw toothed grain bettle and the percentage of loss in dry weight after 90 days of storage at various temperature, the results demonstrated that the more number of released individuals occur at 35 oC which was 86 individuals while the temperature 25 oC. gave the less of released individuals which was 32 individuals. In addition, highest percentage of dry weight loss recorder at 30 oC. which was 44.5%, while the lowest percentage of weight loss recorded at 25 oC. which was 18.67%. | ||
| Keywords | ||
| Temperatures; Toothed Grain; stage; Date Palm; Generation time | ||
|
Statistics Article View: 109 PDF Download: 63 |
||