جمعیت‌شناسی کنۀ شکارگرAcari: Phytoseiidae) ) Amblyseius swirskii روی کنۀ تارتن دولکه‌ای Tetranychus urticae (Acari: Tetranychidae) در شرایط آزمایشگاهی

نوع مقاله : مقاله پژوهشی


گروه گیاه‌پزشکی، دانشکدۀ کشاورزی، دانشگاه ولی‌عصر(عج)، رفسنجان


در این پژوهش به بررسی طول عمر، تولیدمثل، بقا و نسبت جنسی کنۀ شکارگرAmblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) با تغذیه از تخم کنۀ Koch  Tetranychus urticae در شرایط آزمایشگاهی رطوبت نسبی 10±75 درصد دورۀ نوری 16 ساعت روشنایی به 8 ساعت تاریکی و سه دمای 1±25، 1±30 و 1±35 درجۀ سلسیوس روی دیسک برگ­های توت‌فرنگی پرداخته شد. میانگین کل دورۀ رشدی کنۀ شکارگر از تخم تا بالغ کنۀ کامل در دماهای 25، 30 و 35 درجۀ سلسیوس به ترتیب 97/0±16/41، 49/0±98/35 و 49/0±39/33 روز به دست آمد. طول دوره‌های رشدی مراحل مختلف با افزایش دما از 25 درجۀ سلسیوس تا 35 درجۀ سلسیوس کاهش یافت. نرخ ذاتی افزایش جمعیت (r) برای این کنۀ شکارگر در سه دمای 1±25، 1±30 و1±35 درجۀ سلسیوس به ترتیب 01/0±16/0، 01/0±21/0 و 01/0±23/0 روز 1- بود که بین سه دما اختلاف معنی­دار مشاهده شد. همچنین نرخ خالص تولیدمثل (R0) این کنۀ شکارگر در سه دمای یادشده به ترتیب 65/2±22/12، 20/2±34/17 و 19/2±31/16 نتاج بود که بین دمای 25 درجۀ سلسیوس با دو دمای دیگر اختلاف معنی­دار مشاهده شد. نتایج این پژوهش اطلاعاتی در مورد جمعیت‌شناسی (دموگرافی) کنۀ شکارگر A. swirskii در سه دما، روی کنۀ تارتن دولکه­ای فراهم کرده است. این نتایج نشان می­دهد که رشد جمعیت کنۀ شکارگر در دمای 35 درجۀ سلسیوس بیشتر از دو دمای دیگر است که می­توان این نتایج را برای مقایسۀ رشد جمعیت کنۀ شکارگر با دیگر دماها یا روی دیگر برنامه (رژیم­)های غذایی برای استفادۀ بهتر از این شکارگر در کنترل زیستی (بیولوژیک) استفاده کرد.


عنوان مقاله [English]

Demography of predatory mite Amblyseius swirskii (Acari: Phytoseiidae) on Tetranychus urticae (Acari: Tetranychidae) under laboratory condition

نویسندگان [English]

  • Ferdows Rafizadeh Afshar
  • Malihe Latifi
Department of Plant Protection, College of Agriculture, Vali-e-Asr University of Rafsanjan, Iran
چکیده [English]

developmental time, reproduction, survival and sex ratio of predatory mite, Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) were evaluated when feeding on Tetranychus urticae Koch eggs in laboratory conditions at three constant temperatures (25± 1, 30±1 and 35±1°C), 70±10% R.H. and 16L: 8D h on strawberry leaf discs. Total developmental time of the predatory mite was obtained 41.16±0.97, 35.98±0.49 and 33.39±0.49 days at 25, 30 and 35 °C, respectively,. Developmental time of different stages decreased as temperature increased from 25 to 350C. The intrinsic rate of increase (r) was 0.14±0.01, 0.21±0.01 and 0.23±0.01 day-1, at 25±1°C, 30±1°C and 35±1 °C, respectively. There was significant difference among the intrinsic rates of increase at three temperatures. The net reproduction rate (R0) was 21.22±2.66, 17.34±2.20 and 16.31±2.19 offspring, at the mentioned temperatures. There was significant difference between the net reproduction rate at 25 °C and two other temperatures. Our results provide information about demography of A. swirskii feeding on T. urticae at three constant temperatures. These results showed that population growth of A. swirskii at
35 °C is better than other temperatures (25 and 30°C). These results can be used to compare population growth of predatory mite, A. swirskii, with other different temperatures or on other diets, for better use of this predatory mite, in biological control.

کلیدواژه‌ها [English]

  • Fecundity
  • life table
  • Phytoseiidae
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