مقایسه پراسنجه‌های رشد جمعیت شتة Brachycaudus cardui (Hemiptera: Aphididae) روی گیاه آرتیشو در شرایط مزرعه و آزمایشگاه

نوع مقاله : مقاله کامل، انگلیسی

نویسندگان

1 بخش تحقیقات منابع طبیعی، مرکز تحقیقات کشاورزی و منابع طبیعی استان همدان، سازمان تحقیقات، آموزش و ترویج کشاورزی، همدان، ایران .

2 بخش کنترل بیولوژیک، شرکت رها اندیش کاوان، تهران، ایران.

چکیده

پراسنجه‌های جدول زندگی شتهBrachycaudus cardui L. (Hemiptera: Aphididae)  روی گیاه کنگر فرنگی (آرتیشو)Cynara scolymus L. در شرایط آزمایشگاهی (1 ± 22درجه سلسیوس، رطوبت نسبی 5 ± 65 درصد و دوره نوری 14 ساعت روشنایی و 10 ساعت تاریکی) و شرایط نیمه صحرایی (22–34 درجه سلسیوس و رطوبت نسبی 25–70 درصد) مورد مطالعه قرار گرفت. شتــه‌های B. cardui پرورش یافته در شرایط آزمایشگاهی نسبت به شرایط نیمه صحرایی از میزان زنده مانی، باروری و طول عمر بالاتری برخوردار بودند. در شرایط نیمه صحرایی به طورمعنی­داری طول دوره پورگی، طول عمرحشرات کامل و چرخة زندگی کوتاه‌تری نسبت به شرایط آزمایشگاهی داشت. نرخ ذاتی افزایش (rm)، نرخ خالص تولیدمثل (R0) و نرخ متناهی افزایش جمعیت (λ) در شرایط آزمایشگاهی بیشتر از مقادیر به دست آمده در شرایط نیمه صحرایی بودند، ولی مقدار متوسط یک نسل T در مزرعه بیشتر از شرایط آزمایشگاهی بود. در این بررسی نتایج به وضوح نشان داد که پراسنجه‌های جدول زندگی B. Cardui در شرایط نیمه صحرایی و آزمایشگاهی تفاوت داشتند. این نتایج به ما در درک پویایی جمعیت B. Cardui در شرایط مزرعه کمک می‌کند تا تصمیمات مدیریت بهتری برای محصولات مهم اقتصادی بگیریم.

کلیدواژه‌ها

عنوان مقاله [English]

Comparing life table parameters of Brachycaudus cardui (Hemiptera: Aphididae) on artichoke under laboratory and semi-field conditions

نویسندگان [English]

  • Alireza Rajabi Mazhar 1
  • Zahra Tazerouni 2
1 Natural Resources Research Department, Hamadan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Iran.
2 Department of Biological Control, Raha Andish Kavan Company, Tehran, Iran.
چکیده [English]

Life table parameters of Brachycaudus cardui L. (Hemiptera: Aphididae) feeding on the host plant, Cynara scolymus L. (Artichoke) were studied under laboratory (22 ± 1°C, relative humidity of 65 ± 5% and a photoperiod of 14L : 10D h) and semi-field conditions (22 – 34°C, and relative humidity of 25 – 70%). Under laboratory condition, B. cardui reared on artichoke had a higher survival rate, fecundity, and longevity than those reared under semi-field condition. When B. carduireared under semi-field condition, they had a longer nymphal developmental time, shorter adult longevity, and lower fecundity than those reared under laboratory condition. The intrinsic rate of increase (rm), net reproductive rate (R0), and the finite rate of increase (λ) under laboratory condition were higher than those obtained under semi-field condition. However, the mean generation time T (days) aphids in the semi-field were higher than those reared under laboratory condition. In the present study, the results clearly showed that life table parameters of B. carduiwere different under semi-field and laboratory conditions. These results canhelp us to understand the population dynamics of B. Cardui under semi-field condition and make better management decisions for economically important crops.

کلیدواژه‌ها [English]

  • Brachycaudus cardui
  • artichoke
  • life table parameters

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