بررسی دو سالانه جدول زندگی کرم برگ‌خوارتوتGlyphodes pyloalis Walker (Lep.: Pyralidae) در شرایط صحرایی

نوع مقاله: مقاله پژوهشی

نویسندگان

گروه گیاه‌پزشکی، دانشکده علوم کشاورزی، دانشگاه گیلان

چکیده

پروانه برگ­خوار توت Glyphodes pyloalis Walkerآفت اختصاصی درختان توت در شمال ایران است. در پژوهش حاضر، پارامترهای جدول زندگی این آفت در سال­ های 1393 و 1394 در شرایط صحرایی شهر رشت بررسی شد. داده­ های جدول زندگی بر اساس نظریه سن- مرحله رشدی دوجنسی تجزیه و تحلیل شدند. بین طول دوره پیش از بلوغ در دو نسل در سال 1393 اختلاف معنی ­دار بود، اما در طول دوره پیش از بلوغ برای سه نسل در سال 1394 اختلاف معنی­ داری مشاهده نشد. کل دوره پیش از تخمریزی، دوره تخمریزی و باروری در نسل اول سال 1393 به صورت معنی ­داری بیش­تر از نسل دوم بود. نرخ ذاتی افزایش جمعیت (r) در نسل اول سال 1393 (093/0 بر روز) کم­تر از نسل دوم (106/0 بر روز) بود در حالی که نرخ خالص تولید مثل (R0)، نرخ ناخالص تولیدمثل (GRR) و میانگین طول یک نسل (T) در نسل اول سال 1393 بیش­تر از نسل دوم بود. مقدار r، R0 و T برای نسل­ های اول تا سوم مورد مطالعه در سال 1394 به ­ترتیب بین 093/0 - 081/0 بر روز، 62/24 - 66/14 نتاج و 32/33 - 91/32 روز نوسان داشت. از آن­جا که پارامترهای جدول زندگی این آفت در نسل­ های مختلف در شرایط طبیعی متفاوت بود، نتایج پژوهش حاضر نشان می ­دهد که جمع­ آوری داده­ های جدول زندگی در شرایط صحرایی ضروری به نظر می­ رسد تا با درک دقیق تغییرات فصلی کرم برگ­خوار توت در برنامه­ های کنترل تلفیقی گام موثری برداشت.

کلیدواژه‌ها


عنوان مقاله [English]

A two-year life table study of Glyphodes pyloalis Walker (Lep.: Pyralidae) under field conditions

نویسندگان [English]

  • M. Shabani
  • A. Karimi-Malati
  • M. Ghadamyari
  • J. Hajizadeh
Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
چکیده [English]

Lesser mulberry pyralid, Glyphodes pyloalis Walker is a serious monophagous pest of mulberry in northern Iran. In this study, life table parameters of G. pyloalis were determined during 2014 and 2015 under field conditions in Rasht, Guilan, Iran. Data were analyzed based on an age-stage, two-sex life table. The results showed that total immature developmental time was significantly different for two generations in 2014, whereas, there was no significant difference among three generations of G. pyloalis in 2015 under field conditions. In addition, total preoviposion period, oviposition period and fecundity of adults in first generation were significantly higher than second generation in 2014. The intrinsic rate of increase (r) of G. pyloalis in first generation (0.093 day-1) was significantly less than the second generation in 2014. Whereas, the net reproductive rate (R0), gross reproductive rate (GRR) and the mean generation time (T) were significantly higher in first generation than second generation in 2014. Furthermore, the r, R0 and T values ranged from 0.081 – 0.093 day-1, 14.66 – 24.62 offspring and 32.91 – 33.32 days among three generations in 2015. Because of different life table parameters of the pest generations under field conditions, the results of present study confirmed that collection of life table data under field conditions is invaluable for understanding the seasonal population dynamics of G. pyloalis to construct an effective pest management program.

کلیدواژه‌ها [English]

  • Lesser mulberry pyralid
  • Biology
  • Developmental time
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