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بنا مولایی, پریسا, ایرانی پور, شهزاد, عسگری, شهریار. (1394). اثر رشد جنین میزبان بر کارایی زنبورTrissolcus vassilievi. سامانه مدیریت نشریات علمی, 3(1), 83-100. doi: 10.22092/bcpp.2015.102999
پریسا بنا مولایی; شهزاد ایرانی پور; شهریار عسگری. "اثر رشد جنین میزبان بر کارایی زنبورTrissolcus vassilievi". سامانه مدیریت نشریات علمی, 3, 1, 1394, 83-100. doi: 10.22092/bcpp.2015.102999
بنا مولایی, پریسا, ایرانی پور, شهزاد, عسگری, شهریار. (1394). 'اثر رشد جنین میزبان بر کارایی زنبورTrissolcus vassilievi', سامانه مدیریت نشریات علمی, 3(1), pp. 83-100. doi: 10.22092/bcpp.2015.102999
بنا مولایی, پریسا, ایرانی پور, شهزاد, عسگری, شهریار. اثر رشد جنین میزبان بر کارایی زنبورTrissolcus vassilievi. سامانه مدیریت نشریات علمی, 1394; 3(1): 83-100. doi: 10.22092/bcpp.2015.102999

اثر رشد جنین میزبان بر کارایی زنبورTrissolcus vassilievi

مهار زیستی در گیاه‌پزشکی
مقاله 8، دوره 3، شماره 1، خرداد 1394، صفحه 83-100    اصل مقاله (649.24 K)
نوع مقاله: مقاله پژوهشی
شناسه دیجیتال (DOI): 10.22092/bcpp.2015.102999
نویسندگان
پریسا بنا مولایی* 1؛ شهزاد ایرانی پور1؛ شهریار عسگری2
1دانشگاه تبریز
2مرکز تحقیقات کشاورزی و منابع طبیعی ورامین
چکیده
پارازیتوییدهای تخم از جمله مهم‌ترین دشمنان طبیعی سن گندم هستند. آگاهی از نیازهای اکولژیک دشمنان طبیعی در موفقیت کنترل بیولژیک کاربردی نقش اساسی دارد. یکی از موضوعاتی که در این راستا مطرح است اثر رشد جنین میزبان بر کارایی زنبورهای رشدیافته در آن‌هاست. این موضوع با قرار دادن تخم‌های تازه گذاشته شده (شاهد)، یک، دو، سه، چهار و پنج روزه‌یEurygaster integriceps  در اختیار زنبور پارازیتویید Trissolcus vassilievi مورد بررسی قرار گرفت. دو جمعیت زنبور با منشاء معتدله (تبریز) و نیمه گرمسیری (ورامین) برای این مطالعه به‌کار گرفته شد. تخم‌های پنج روزه جز شش مورد پارازیته نشدند که آن هم تماماً فرزندان نر خارج شدند. اختلاف معنی‌داری بین دو جمعیت زنبور از نظر میزان پارازیتیسم مشاهده نشد، ولی اختلاف بین سنین مختلف تخم میزبان معنی‌دار بود. میزان پارازیتیسم زنبورها تا پایان دوروزگی رشد جنین تفاوت معنی‌داری نداشت، ولی در تخم‌های سه و چهار روزه کاهش معنی‌داری نشان داد. درصد خروج حشرات کامل، نسبت جنسی نتاج و زادآوری زنبورهای خارج شده نیز تحت تأثیر سن میزبان قرار گرفت. زادآوری با افزایش رشد جنین بعد از یک روزگی کاهش معنی‌داری نشان داد و حداکثر تفاوت بین شاهد و تخم‌های چهار روزه حدود 50% بود. زنبورهایی که در تخم‌های با جنین رشد یافته نشو و نما کرده بودند، در هفته‌ی اول زندگی خود موفق به جبران نسبی عقب‌ماندگی تولیدمثلی اولیه شدند. در مجموع رشد جنین میزبان تا دو روزگی اثر اندکی روی زنبورها داشت ولی بعد از آن موجب افت شدید شایستگی نتاج شد.

 

 
کلیدواژه‌ها
Eurygaster integriceps؛ سن میزبان؛ طول عمر؛ اندازه‌ی زنبور؛ نسبت جنسی؛ زادآوری
عنوان مقاله [English]
Effect of the host embryogenesis on efficiency of Trissolcus vassilievi
چکیده [English]
Egg parasitoids are the most important natural enemies of sunn pest, Eurygaster integriceps (Hem.: Scutelleridae). Knowledge on ecological requirements of natural enemies has essential role in success of applied biological control programs. One issue in this context is the effect of host embryogenesis upon performance of those wasps that developed within host eggs. This issue was studied by exposing new laid eggs (control), as well as one, two, three, four and five day old eggs to Trissolcus vassilievi. Two parasitoid populations were used in this study obtained from Tabriz and Varamin. Five day old eggs were rejected by the parasitoid except in six cases, all of which were allocated to male progeny. No significant difference was observed in the number of parasitized eggs between the two populations, but difference among host ages was significant. There was no significant difference in parasitism rate of wasps in ≤ 2 day old eggs, nevertheless significant decrease was observed in three and four day old eggs. Adult emergence rate, sex ratio (female percent) and fecundity were influenced by host age. Fecundity significantly decreased by increasing host age over one day and a maximum 50% difference was recorded between control and four day old eggs. Those wasps that were developed in developed stages of host eggs were capable to partially compensate their initial lag in first week of the reproductive life.  As a conclusion, host embryogenesis has little impact on the parasitoid fitness before two days, while more effects were observed in older eggs.

 
کلیدواژه‌ها [English]
Eurygaster integriceps, host age, life span, wasp size, Sex ratio, fecundity
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