پارازیتیسم زنبور پارازیتوئیدTrichogramma evanescens (Hym.: Trichogrammatidae) پرورش یافته روی سنین مختلف تخمAnagasta kuehniella (Lep.: Pyralidae)

نوع مقاله : مقاله پژوهشی


1 گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران،

2 موسسه تحقیقات گیاه‌پزشکی کشور، تهران، ایران


زنبور پارازیتوئید Trichogramma evanescens Westwood یکی از مهم ­ترین عوامل مهار زیستی بال­پولک­داران آفت می‌باشد که در سراسر ایران گسترش دارد. در پژوهش حاضر، نرخ پارازیتیسم زنبور T. evenescens پرورش یافته روی تخم­ های یک، دو، سه و چهار روزه شب ­پره آرد Anagasta =Ephestia kuehniella Zeller در شرایط دمایی 1±25 درجه سلسیوس، رطوبت نسبی 5±55 درصد و دوره نوری 16 ساعت روشنایی و 8 ساعت تاریکی مورد مطالعه قرار گرفت. بر اساس نتایج به دست آمده، پارامترهای پارازیتیسم زنبور T. evanescens به­ طور معنی­ داری تحت تأثیر سنین مختلف تخم میزبان قرار گرفت. بیش­ترین (69/67 میزبان) و کم­ترین (92/15 میزبان) مقادیر نرخ خالص پارازیتیسم (C0) به ترتیب در تخم­ های یک و چهار روزه شب ­پره آرد ثبت شد. مقادیر محاسبه شده نرخ تبدیل جمعیت میزبان به نتاج پارازیتوئید (Qp ) در تمام سنین مورد مطالعه برابر با 1 بود. با افزایش سن تخم از یک به چهار روز، مقادیر نرخ پایدار پارازیتیسم (ψ) از 412/0 میزبان/ پارازیتوئید به 266/0 میزبان/ پارازیتوئید کاهش یافت. نرخ متناهی پارازیتیسم () نیز تحت تأثیر سنین مختلف تخم میزبان قرار گرفت و بیش­ترین و کم­ترین مقدار این پارامتر به ترتیب در تخم­ های یک ­روزه (583/0 بر روز) و چهار روزه شب ­پره آرد (337/0 بر روز) ثبت شد. نتایج مطالعه حاضر نشان داد که پارازیتیسم زنبور T. evanescens تحت تأثیر سنین مختلف تخم شب­ پره آرد قرار گرفت. نتایج این مطالعه می­ تواند اطلاعات مفیدی در مورد استفاده از سن مناسب تخم شب­ پره آرد جهت پرورش انبوه T. evanescens فراهم نماید.


عنوان مقاله [English]

Parasitism of Trichogramma evanescens (Hym.: Trichogrammatidae) reared on different egg ages of Anagasta kuehniella (Lep.: Pyralidae)

نویسندگان [English]

  • F. Tabebordbar 1
  • P. Shishehbor 1
  • E. Ebrahimi 2
1 Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2 Iranian Research Institute of Plant Protection, Tehran, Iran
چکیده [English]

Trichogramma evanescens Westwood is an important biological control agent of lepidopteran pests and is widely distributed throughout Iran. In the current study, parasitism rate of T. evenescens on different egg ages of the Anagasta= Ephestia kuehniella Zeller (1, 2, 3 and 4- day- old) was studied at 25±1ºC, 55±5% RH and 16: 8 h L: D photoperiod. The results obtained showed a significant effect on parasitism rate. The highest and the lowest values of net parasitism rate (C0) were 67.69 hosts and 15.92 hosts for 1 and 4- day- old eggs, respectively. The transformation rate of host population to parasitoid offspring (Qp < /sub>) was equal to 1 at all egg ages. The values of stable parasitism rate (ψ) decreased from 0.412 to 0.266 (host/parasitoid) with increasing host age from 1 to 4 day. Finite parasitism rate (was significantly affected by different egg ages and the highest (0.583 day-1) and lowest (0.337 day-1) values were recorded for 1 and 4- days- old eggs, respectively. The results of the current study indicated that parasitism of T. evanescens was strongly affected by different egg ages of A. kuehniella. This finding provide helpful information for mass rearing of T. evanescens.

کلیدواژه‌ها [English]

  • egg parasitoid
  • different egg ages
  • biological control
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