دموگرافی سوسک شاخدار خرماOryctes elegans (Coloptera : Scarabaeidae) در شرایط آزمایشگاهی
الموضوعات :
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الکلمات المفتاحية: بم, Life table, جدول زندگی, Oryctes elegans, دموگرافی, Demography, Fruit Stalk borer, Bam, سوسک شاخدار خرما,
ملخص المقالة :
سوسک شاخدار خرما، سوسک کرگدنی خرما یا سوسک کره Oryctes elegans Prell. ، یکی از آفات جدی و مهم خرما در ایران، به خصوص در منطقه بم می‌باشد. در این تحقیق جدول زندگی سوسک شاخدار خرما در شرایط آزمایشگاهی، دمای 2± 27 درجه سلسیوس، رطوبت نسبی 5± 65 درصد و دوره نوری 16 ساعت روشنایی و 8 ساعت تاریکی مطالعه شد. داده‌های به دست آمده بر اساس جدول زندگی (نر و ماده)، مراحل رشدی- سنی، با در نظر گرفتن تغییرات رشد افراد و جنسیت آن‌ها، تجزیه و تحلیل شدند. میانگین طول دوره رشدی برای تخم، لارو و شفیره به ترتیب، 4/16، 8/216 و 2/26 روز بود. در شرایط آزمایشگاه درصد مرگ و میر مراحل تخم، لارو و شفیرگی به ترتیب 2/5، 6/22 و 2/3 به دست آمد. نرخ ذاتی افزایش جمعیت (rm)، نرخ متناهی افزایش جمعیت(λ)، نرخ ناخالص تولید مانند (GRR)، نرخ خالص تولید مانند (R0)، مدت زمان دو برابر شدن جمعیت(DT) و متوسط مدت زمان نسل (T) به ترتیب 002/0 روز1- ، 002/1 روز1- ، 6/71 تخم ماده، 3/42 نتاج ماده، 7/110 روز و 328 روز بودند. نتایج به دست آمده نشان داد که سوسک شاخدار خرما یک گونه تک نسلی است.
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