تاثیر غلظت توصیه شده مزرعه‌ای سه حشره‌کش مختلف روی فراسنجه‌های جدول زندگی زنبور پارازیتوئید Trichogramma evanescens (Hym.: Trichogrammatidae) در شرایط آزمایشگاهی

نوع مقاله : مقاله پژوهشی


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

2 گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه خلیج فارس، بوشهر، ایران


کنترل شیمیایی یکی از متداول­ و پرکاربردترین روش­های کنترل آفات می­ باشد. استفاده از کنترل شیمیایی همراه با سایر روش ­های کنترلی کم­ خطر مانند کنترل بیولوژیک در برنامه ­های مدیریت تلفیقی آفات توصیه می ­شود. بنابراین، در این چارچوب یافتن حشره­ کش مناسب و زمان مناسب سم­پاشی ضروری به نظر می­ رسد. در این مطالعه، سه مرحله مختلف رشدی زنبور Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae) شامل لارو، پیش­­ شفیره و شفیره با روش غوطه­ وری در معرض غلظت توصیه شده مزرعه ­ای حشره­ کش­ های دلتامترین، اسپیروترامرات و فلوپیرادیفورون قرار گرفتند. سپس، ویژگی­ های تولیدمثلی، زیستی و فراسنجه ­های جدول زندگی زنبور T. evanescens برآورد شد. در تخم­ های تیمار شده با دلتامترین در هر سه مرحله رشدی زنبور T. evanescens کاهش معنی­ دار باروری و طول دوره تخمریزی حشرات ماده زنبور پارازیتوئید مشاهده شد. تیمار مراحل لاروی و پیش­شفیرگی زنبور T. evanescens با اسپیروتترامات و فلوپیرادیفورون تاثیر معنی ­داری بر نرخ ناخالص تولیدمثل (GRR)، نرخ متناهی افزایش جمعیت (λ)، نرخ ذاتی افزایش جمعیت (r) و نرخ خالص تولیدمثل (R0)  نداشت. در صورتی­ که شفیره حساس ­ترین مرحله رشدی زنبور پارازیتوئید بوده و در صورت مواجه با هر سه حشره کش، همه فراسنجه­ های جدول زندگی تحت تأثیر قرار گرفتند. نتایج این پژوهش حاکی از سازگاری نسبی اسپیروترامات و فلوپیرادیفورون با زنبور پارازیتوئید T. evanescens است. با این حال، برای تأیید نتایج، آزمایش ­هایی برای ارزیابی تأثیر حشره ­کش ­های مورد آزمایش روی T. evanescens در شرایط مزرعه ­ای مورد نیاز است.


عنوان مقاله [English]

Effects of field recommended concentrations of three different insecticides on life table parameters of the parasitoid Trichogramma evanescens (Hym.: Trichogrammatidae) under laboratory conditions

نویسندگان [English]

  • F. Tabebordbar 1
  • P. Shishehbor 1
  • M. Ziaee 1
  • F. Sohrabi 2
1 Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2 Department of Plant Protection, Faculty of Agriculture, Persian Gulf University, Bushehr, Iran
چکیده [English]

Chemical control is the most commonly practice in controlling pests. The application of chemical control is recommended in combination with other reduced risks control techniques such as biological control under Integrated Pest Management programs. Therefore, finding the appropriate chemical insecticide and the right time of spraying seems essential. In this study,three different growth stages of Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae) including larvae, pre-pupae, and pupae were exposed to the field recommended concentration of deltamethrin, Spirotetramat and flupyradifurone insecticides using insect dipping method. After which, the reproductive, biological characteristics and life table parameters of T. evanescens female adults were estimated. The eggs treated with deltamethrin in all three developmental stage of T. evanescens significantly reduced fecundity rate and oviposition period of the female adult parasitoids. Thegross reproductive rate (GRR), finite rate of increase (λ), intrinsic rates of increase (r), and net reproductive rate (R0) were not affected when larval and pre-pupal stages of T. evanescens were exposed to field recommended concentration of spirotetramat and flupyradifurone in comparison with control. However, the pupal stage showed to be the most susceptible stage and all of the life table parameters were affected upon exposure to three insecticides. Results of this research suggest a relative compatibility of spirotetramat and flupyradifurone with T. evanescens parasitoid. However, experiments under field conditions to evaluate the impact of tested insecticides on T. evanescens are required to confirm the results.

کلیدواژه‌ها [English]

  • Spirotetramat
  • life table
  • deltamethrin
  • parasitoid
  • flupyradifurone
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