Predation rate of Hippodamia variegata (Coleoptera: Coccinellidae) feeding on different densities of Aphis gossypii (Hemiptera: Aphididae)
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Abstract:
نرخ شکارگری اساس هر پژوهش در برهم‌کنش شکار-شکارگر است و یکی از اجزای مهم در انتخاب شکارگران در کنترل بیولوژیک بهشمار میرود. نرخ شکارگری کفشدوزکHippodamia variegata (Goeze) با تغذیه از تراکمهای مختلف (20، 40، 60، 80 و 100) عدد از پورههای سن سوم شته پنبه Aphis gossypii Glover در شرایط آزمایشگاهی (1±25 درجه سلسیوس، رطوبت نسبی 5 ±65 درصد و دوره نوری 16 ساعت روشنایی و 8 ساعت تاریکی) بررسی شد. نرخ خالص شکارگری (C0) با استفاده از جدول زندگی دوجنسی سنی-مرحلهی رشدی در تراکمهای 20، 40، 60، 80 و 100 شته بهترتیب 50/1547، 91 /4011، 78/4450، 20/5300 و 73/5305 شته طعمه بود. میانگین نرخهای مصرف برای نر و ماده با افزایش تراکم طعمه افزایش یافت. نرخ شکارگری برای هر دو جنس نر و ماده نیز با افزایش تراکم طعمه افزایش یافت. پایینترین و بالاترین نرخهای مصرف برای مادهها 50/1547 و 73/5305 پوره طعمه بهترتیب در تراکمهای 20 و 100 شته پنبه بود. نرخ تبدیل از جمعیت طعمه به نتاج شکارگر (Qp) با افزایش تراکم طعمه کاهش پیدا کرد. نتیجهگیری شد که افزایش تراکم پورههای سن سوم شته پنبه، تأثیرمعنیداری روی پارامترهای شکارگری H. variegata داشت.
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Journal title
volume 35 issue 4
pages 1- 8
publication date 2016-02-20
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