تأثير درجات الحرارة الثابتة في بعض المؤشرات الحياتية للمتطفل Encyrtus aurantii (Geoffroy) (Hymenoptera: Encyrtidae) مخبرياً.
Abstract
دُرست حياتية المتطفل Encyrtus aurantii (Geoffroy) (Hymenoptera: Encyrtidae) مخبرياً عند درجات الحرارة 18، 21، 24، 27، 30 مْ ورطوبة نسبية 65± 5% وفترة إضاءة (16:8) سا (ظلام: إضاءة). تمت تربية المتطفل على حشرة الحمضيات القشرية البنية الرخوة Coccus hesperidum Linnaeus المرباة على القرع العسلي Cucurbita moschata. بينت النتائج أن أطول فترة حياة للوصول من البيضة إلى طور العذراء كانت على درجة حرارة 18مْ بمتوسط 24.25 يوماً، وأقل فترة كانت على درجة الحرارة 30 مْ بمتوسط 8.25 يوماً، وكانت أطول فترة للتطور من طور العذراء حتى انبثاق الحشرة الكاملة على درجة حرارة 18 مْ بمتوسط 10.75 يوماً، و أقل فترة على درجة الحرارة 30 مْ بمتوسط 5.5 يوماً. كانت أطول فترة للتطور من طور البيضة وحتى انبثاق الحشرة الكاملة على درجة الحرارة 18 مْ بمتوسط 35 يوماً، وأقلها على درجة الحرارة 30مْ بمتوسط 13.75 يوماً. وكانت العتبة الحرارية الدنيا (LDT) من البيضة حتى العذراء 15.83 مْ، ومن العذراء حتى انبثاق الحشرة الكاملة 13.43 مْ، وللجيل الكامل 16.95مْ. ويحتاج المتطفل إلى مجموع درجات حرارة فعّالة (SET) 122.74 درجة- يومية فوق العتبة الحرارية الدنيا (16.95) لإتمام جيل واحد (من البيضة إلى البالغة).
Some biological parameters of the parasitoid, Encyrtus aurantii (Geoffroy) (Hymenoptera : Encyrtidae) were studied under controlled laboratory conditions at five levels of temperature 18, 21, 24, 27, and 30 °C, 65±5% R.H. and a photoperiod of 16:8 (L:D) h when reared on Brown soft scale Coccus hesperidum L. (Homoptera: Coccidae) reared on Pumpkin Cucurbita moschata during the season 2010- 2011 . Result showed that the longer developmental period from egg to pupa was on 18 °C with an average of 24.25 days, and the lower developmental period was on 30°C with an average of 8.25 days. The longer developmental period from pupa to adult was on 18 °C with an average of 10.75 days, and the lower period was on 30 °C with an average of 5.5 days. The lower developmental threshold (LDT) from egg to pupa was 15.83°C, and 14.34°C from pupa to adult. E. aurantii required a Sum of Effective Temperatures (SET) of 122.74 degree-days above the lower developmental threshold (16.95 °C) to complete the development from egg to adult.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to the Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series
Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series . The Readers have the right to send, print and subscribe to the initial version of the article, and the title of Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series Publisher
journal uses a CC BY-NC-SA license which mean
You are free to:
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material
- The licensor cannot revoke these freedoms as long as you follow the license terms.
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- NonCommercial — You may not use the material for commercial purposes.
- ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.