ترجیح غذایی کنه شکارگر Amblyseius swirskii روی سفید بالک گلخانه Trialeurodes vaporariorumتیمار شده و تیمار نشده با قارچ Beauveria bassiana

نوع مقاله : مقالات پژوهشی


دانشگاه تهران


کنه شکارگر Amblyseius swirskii و قارچ بیمارگرBeauveria bassiana از دشمنان طبیعی مهم سفید بالک گلخانه Trialeurodes vaporariorum هستند. در بررسی کارایی و انتخاب دشمنان طبیعی، تعیین ترجیح غذایی آنها، هنگامی که دشمن طبیعی در برابر میزبان آلوده یا غیر آلوده به عوامل بیمارگر قرار می‌گیرد، از اهمیت خاصی برخوردار است. در این تحقیق ترجیح غذایی کنه شکارگر دو روز پس از بالغ شدن در برخورد با پوره سن سوم سفید بالک گلخانه غیر آلوده و تیمار شده با قارچ B. bassiana در دو تیمار زمانی 24 و 48 ساعت بعد از آلودگی شکار با استفاده از شاخص بتای منلی تعیین شد. شکارگرهایی که 24 ساعت گرسنگی داده شده بودند بر روی دیسک‌های برگی خیار رهاسازی شدند و پس از 24 ساعت تعداد سفید‌بالک‌های مصرف شده شمارش شدند. آزمایش درون ظروف پتری تهویه‌دار و به مدت 24 ساعت انجام شد. براساس نتایج مقدار شاخص در بازه زمانی 24 و بازه زمانی 48 ساعت پس از تیمار شدن میزبان به قارچ، به ترتیب 19/۰±15/4 و 12/۰±23/۲ برآورد شد. نتایج نشان داد، A. swirskii در تغذیه از سفید بالک‌های غیر آلوده در مقابل سفید بالک‌های تیمار شده با قارچ در بازه زمانی 24 ساعت (0034/0>P) و 48 ساعت (0001/0P


عنوان مقاله [English]

Prey Preference of Predatory mite Amblyseius swirskii (Athias-Henriot) (Acari: Phytoseiidae) on untreated and Beauveria bassiana-treated of Trialeurodes vaporariorum (Homoptera: Aleyrodidae

نویسندگان [English]

  • Marjan Seiedy
  • Mahdi Tork
University of Tehran
چکیده [English]

The predator Amblyseius swirskii and entomopathogenic fungus Beauveria bassiana are important biocontrol agents of Trialeurodes vaporariorum. Determination of the host preference of predators in the fields when receiving signals related to either untreated and Beauveria bassiana-treated pest is important.
Materials and Methods
In this research, the prey preference of adult female (2 days old) of A. swirskii was determined on untreated and Beauveria bassiana-treated of Trialeurodes vaporariorum (Homoptera: Aleyrodidae) in various treatments base on Manly Index. These different treatments consisted of two time intervals; 24 and 48 h post-inoculation of greenhouse whiteflies with 1×105 conidia /ml of B. bassiana with 13 replicates. 24-h starved predators were added to the leaf discs singly then the number of consumed untreated and B. bassiana-treated T. vaporariorum in each Petri dish was assessed after 24 h.
Results and Discussion
The results revealed that mean number of consumed B. bassiana-treated T. vaporariorum in two time intervals; 24 and 48 h. after inoculation were 4/15±0/19 and 2.23±0/12, respectively. This investigation showed a significant preference of A. swirskii towards untreated T. vaporariorum in 24 (P< 0.0034) and 48 h. (P

کلیدواژه‌ها [English]

  • Amblyseius swirskii
  • Entomopathogen
  • Greenhouse Whitefly
  • prey preference
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