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مقایسه پارامترهای جدول زندگی دوجنسی دو جمعیت: باغی، و انباری، زنبور Venturia canescens (Hym.: Ichneumonidae در شرایط آزمایشگاهی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری

2 دانشیار دانشگاه تهران

3 استادیار پژوهشکده کشاورزی هسته ای

چکیده

کرم گلوگاه انار Ectomyelois ceratoniae یک آفت پلی فاژ در سرتاسر جهان است و در ایران این آفت هر ساله خسارت قابل توجهی را در باغ های انار ایجاد می کند. Venturia canescens یکی از پارازیتوئیدهای لارو این آفت است که به عنوان پارازیتوئید برخی آفات انباری نیز شناخته می شود. در پژوهش حاضر پارامترهای دموگرافی دو جمعیت از این زنبور جمع آوری شده: از باغ های انار، و از داخل انبارها، ارزیابی شد. هر دو جمعیت از زنبورهای جمع آوری شده، روی لاروهای سن پنجم Ephestia kuehniella ، در دمای 1  25 درجه سلسیوس، رطوبت 10  65 درصد و 16 ساعت روشنایی پرورش داده شدند. داده های جدول زندگی براساس نظریه جدول زندگی سنی – مرحله رشدی دو جنسی تجزیه و تحلیل شد. طول دوره رشدونمو زنبورهای جمعیت باغ، و جمعیت انبار، به ترتیب 49/0  37/22 و51/0 73/24 روز و طول دوره تخم ریزی به ترتیب برابر با 35/0 33/9 و37/0 66/8 روز بود. میزان امید به زندگی 07/15و 85/18 روز گزارش شد. نرخ ذاتی افزایش جمعیت (rm) 168/0 و 153/0 ماده/ماده/روز، نرخ متناهی افزایش جمعیت (λ) 183/1 و 165/1 ماده/ماده/روز، نرخ خالص تولیدمثل (R0) 67/78 و 93/75 ماده/ماده و متوسط مدت زمان یک نسل (T) 97/25 و 23/28 روز بدست آمد. این نتایج پیشنهاد می کند که زنبور جمعیت باغی در مقایسه با جمعیت انباری، از نظر پارامترهای جدول زیستی، می تواند کارایی نسبتا بالاتری در فعالیت پارازیتیسمی داشته باشد. مطالعات تکمیلی برای مقایسه خصوصیات بیولوژیک و رفتاری این دو جمعیت نیاز می باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Comparison of two-sex life table parameters of two populations of parasitoid wasps Venturia canescens (Hym.: Ichneumonidae) of garden and stored products under laboratory conditions

نویسندگان [English]

  • Fatemeh Bagheri 1
  • Seyd Hossein Goldansaz 2
  • Mahmoud Soufbaf Sarjamee 3
1 PHD Student
2 Associate Professor, University of Tehran
3 Assistant Professor of Nuclear Agriculture Research Institute
چکیده [English]

The carob moth Ectomyelois ceratoniae (Zeller) is a serious pest on carob, pomegranate, dates, citrus and almond worldwide, and causes considerable losses in pomegranate orchards in Iran. Venturia canescens is one of larval parasitoids of this pest that is known as parasitoid of some stored products too. The present study assessed demographic parameters in two populations of the V. canescens (Hym.: Ichneumonidae) that were collected from pomegranate orchards, and stored products in storages. The each of two populations collected were developed on fifth instar larvae of Ephestia kuehniella as host under laboratory conditions at 25 ± 1°C, 65 ± 5% RH and a photoperiod of 16: 8 h (L: D). Life table data were analyzed using age-stage, two- sex life table procedure. The developmental time of parasitoid wasps of orchards, and stored products populations were 22.37 and 24.73 days and the values of oviposition period were 9.33 and 8.66 days, respectively. The life expectancy values were recorded 15.07 and 18.85 days, respectively. The intrinsic rate of increase (rm) were 0.168 and 0.153( females/female/days), the finite rates of increase (λ) were 1.183 and 1.185 (females/female/days), the net reproductive rates (R0) were 78.67 and 75.93 (females/female) and the mean generation time (T) were 25.97 and 28.23 days, respectively in above mentioned populations. This study suggests that orchard population may had highest performance than stored products population regarding the life table parameters. Complementary research to study biology and behavior of two populations needed.

کلیدواژه‌ها [English]

  • Venturia canescens
  • Two-sex life table
  • pomegranate orchard
  • stored products
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