اثر سن تخم (Ephestia kuehniella (Lepidoptera: Pyralidae روی پراسنجه های زیستی و جدول زندگی (Trichogramma evanescens (Hymenoptera: Trichogrammatidae

نوع مقاله : مقاله کامل، فارسی

نویسندگان

1 گروه گیاه پزشکی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران

2 موسسه تحقیقات گیاه‌پزشکی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

زنبور جنس Trichogramma یکی از مهم­ترین عوامل مهار زیستی تخم بال­پولک­داران می­باشد. این انگل­ واره در سرتاسر ایران گسترش دارد. در این مطالعه، اثر سنین مختلف تخم Ephestia kuehniella Zeller بر تعداد تخم­ های انگلی شده، طول دوره رشد پیش از بلوغ، نسبت جنسی، طول عمر و زادآوری زنبور Trichogramma evanescens Westwood ارزیابی شد. پنج سن تخم شامل 12، 24، 36، 48 و 60 ساعت E. kuehniellaدر اختیار یک ماده evanescens T. جفت­گیری کرده با طول عمر کمتر از 24 ساعت قرار داده شد. تعداد تخم­ های انگلی شده در سنین مورد آزمایش به ترتیب 04/0±40/32، 05/0±80/29، 16/0±93/26، 06/0±83/23 و 04/0±91/18 بود. بر اساس نتایج حاصله، طول دوره رشد پیش از بلوغ، نسبت جنسی، طول عمر و زادآوری زنبور evanescens T. به طور معنی­ داری تحت تاثیر سن تخم­ ها قرار گرفت. نتایج نشان داد که نرخ خالص تولیدمثل (R0)، نرخ ذاتی افزایش جمعیت (r)، نرخ متناهی افزایش جمعیت (λ) با افزایش سن تخم کاهش یافت. بیشترین نرخ ذاتی افزایش جمعیت و نرخ متناهی جمعیت به ترتیب 006/0 ±390/0 (ماده/ ماده/ روز) و 008/0 ± 47/1 (روز) در تخم 12 ساعت بود. نتایج این پژوهش نشان داد که سن تخم میزبان یک عامل موثر روی پراسنجه­ های رشد جمعیت زنبور evanescens T. است و تخم ­های E. kuehniella با سن 12 ساعت، مناسب­ترین سن برای رشد، تولید مثل و پرورش انبوه زنبور evanescens T. می­باشند.

کلیدواژه‌ها

عنوان مقاله [English]

Effect age of Ephestia kuehniella (Lepidoptera: Pyralidae) egg on biological and life table parameters of Trichogramma evanecens (Hymenoptera: Trichogrammatidae)

نویسندگان [English]

  • fatemeh Tabebordbar 1
  • parviz shishehbor 1
  • Ebrahim Ebrahimi 2
1 Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2 Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
چکیده [English]

Trichogramma evanescens Westwood is one of the most important biological control agents of lepidopteran pests. This parasitoid is widely distributed throughout Iran. Present study was conducted to assay influence of the age of Ephestia kuehniella Zeller egg on the number of parasitized eggs, developmental time, sex ratio, progeny longevity and fecundity of T. evanescens. Individual mated female parasitoids (E. kuehniella in no-choice experiments. Mean number of parasitized eggs were 32.40 ± 0.04, 29.80 ± 0.05, 26.93 ± 0.16, 23.83 ± 0.06 and 18.91 ± 0.04, respectively. The obtained results showed that different egg ages had a significant effect on the developmental time, sex ratio, progeny longevity and fecundity of the parasitoid wasp. Data analysis demonstrated significant decreasing of net reproductive rate (R0), intrinsic rate of increase (r) and finite rate of increase (λ) with increasing the age of eggs. The highest values for r and λ were 0.390 ± 0.006 day-1 and 1.47 ± 0.008 days, respectively in the eggs with 12h egg. The results of the current study indicated that the egg age is one of the most important factors on life table parameters of T. evanescens and the eggs of E. kuehniella with 12h age are the most suitable eggs for development, reproduction and mass rearing of T. evanescens.

کلیدواژه‌ها [English]

  • Trichogramma evanescens
  • Ephestia kuehniella
  • host eggs age
  • Life table
  • mass rearing

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