Demographic parameters of the diamondback moth, Plutella xylostella (Lep.: Plutellidae) on five rapeseed cultivars
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Abstract:
شب‌پره‌ی پشت الماسی، (Plutella xylostella (L.) (Lep.:Plutellidae، یکی از مخرب‌ترین آفات گیاهان چلیپیان در سراسر دنیا است. در این تحقیق پارامتر‌های دموگرافیک این حشره روی پنج رقم کلزا شامل لیکورد، مودنا، اکاپی، RGsoo3و REGXkobra بررسی شد. آزمایش‌ها در اطاقک رشد با دمای 1±25 درجه‌ی سانتی‌گراد، رطوبت نسبی 5±60 درصد و دوره‌نوری 16 ساعت روشنایی و 8 ساعت تاریکی انجام شد. مرگ و میر مراحل قبل از بلوغ از 47/65 درصد تا 65/75 درصد به ترتیب روی ارقام مودنا و REGXkobra متفاوت بود. امید به زندگی در تخم‌های تازه‌گذاشته‌شده و حشرات کامل در اولین روز ظهور روی ارقام لیکورد، اکاپی، RGsoo3 و REGXkobra به ترتیب 13/48، 4/90؛ 14/69، 10/84؛ 15/39، 7/72؛ 16/25، 12/23؛ 15/06، 6/05 روز تعیین شد. بین نرخ خالص تولید مثل (Ro) روی ارقام مختلف کلزا اختلاف معنی‌دار وجود داشت. بیشترین میزان نرخ خالص تولید مثل روی رقم (74/97±7/99 )RGsoo3به دست آمد. طولانی‌ترین مدت طول هر نسل روی رقم RGsoo3 و کوتاه‌ترین طول نسل روی رقم مودنا مشاهده شد. بین نرخ ذاتی افزایش جمعیت (rm) آفت روی رقم مودنا با سایر ارقام تفاوت معنی‌دار مشاهده شد که نشان می‌دهد رقم مودنا حساس‌ترین رقم به شب‌پره‌ی پشت الماسی است.
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Journal title
volume 28 issue 2
pages 49- 59
publication date 2009-02-19
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