اثر مدت زمان های مختلف ذخیره سازی زنبور انگل واره (Habrobracon hebetor (Hymenoptera: Braconidae در سرما روی برخی پراسنجه های تولیدمثلی و واکنش تابعی آن روی لاروهای بید آرد (Anagasta kuehniella (Lepidoptera: Pyralidae

نوع مقاله : مقاله کامل، فارسی

نویسندگان

گروه گیاه پزشکی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

زنبور انگل­ واره ­ی Habrobracon hebetor Say، یکی از انگل­ واره ­های خارجی مهم مرحله ­ی لاروی بسیاری از آفات بال­ پولک دار می­باشد. در این تحقیق، تأثیر ذخیره ­سازی حشرات کامل در دمای 1±4 درجه­ی سلسیوس در مدت زمان­های مختلف شامل 10، 20 و 30 روز به همراه تیمار شاهد (بدون ذخیره­سازی) روی زادآوری، درصد تفریخ تخم و واکنش تابعی وابسته به سنّ این انگل­ واره در مدت زمان 10 روز روی لاروهای سنّ آخر بید آرد، (Anagasta kuehniella (Zelle مورد بررسی قرار گرفت. لاروها در تراکم­های 2، 4، 8، 16، 32، 64 و 128 به صورت جداگانه در اختیار زنبورهای انگل­ واره قرار داده شدند. آزمایش در شرایط دمایی 1±27 درجه­ ی سلسیوس، رطوبت نسبی 5±60 درصد و دوره ­ی نوری 16 ساعت روشنایی و 8 ساعت تاریکی انجام شد. تعداد لاروهای فلج شده توسط هر زنبور ماده و تعداد تخم ­های گذاشته شده و تفریخ شده به مدت 10 روز به صورت روزانه در هر یک از تراکم ­ها و تیمارها ثبت شد. نتایج نشان داد که نوع واکنش تابعی در همه ­ی تیمارها و در تمام 10 روز آزمایش از نوع دوم می ­باشد. بیش­ترین و کم­ترین نرخ حمله به ترتیب در روز دهم تیمار شاهد (0129/0± 0816/0 بر ساعت) و روز ششم تیمار 30 روز ذخیره­سازی (0083/0± 0474/0 بر ساعت) تخمین زده شد. بیش­ترین و کم­ترین زمان دستیابی به ترتیب در روز هشتم تیمار 30 روز ذخیره ­سازی  (1217/0±5849/1 ساعت) و روز اول تیمار شاهد (0176/0± 3155/0 ساعت) محاسبه شد. کم­ترین مقدار زادآوری، تفریخ تخم زنبور و درصد لاروهای فلج شده­ی میزبان در تیمار 30 روز ذخیره­ سازی به دست آمد.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of different cold storage duration of Habrobracon hebetor (Hymenoptera: Braconidae) on its some reproductive parameters and functional response on flour moth, Anagasta kuehniella (Lepidoptera: Pyralidae) larvae

نویسندگان [English]

  • Mahdi Hassanpour
  • Ali Golizadeh
  • Zahra Abedi
Department of Plant Protection, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده [English]

Habrobracon hebetor Say is one of the most important ectoparasitoids of the larval stage of many lepidopterous pests. In this study, the effect of different cold storage duration (at 4±1°C) including 0 (Control), 10, 20 and 30 day were evaluated on fecundity, percentage of egg hatch as well as age-specific functional response of H. hebetor to last instar of Anagasta kuehniella (Zeller) for 10 day. Different densities of 2, 4, 8, 16, 32, 64 and 128 of the host were offered separately to the parasitoidsat 27±1 °C, 65±5% RH and a photoperiod of 16: 8 (L: D) h. The numbers of paralyzed larvae, produced and hatched eggs in each host density and treatment were recorded daily. The results revealed a type II functional response for all treatments. The highest and lowest values of attack rates were estimated in 10th day of control treatment (0.0816±0.0129 h-1) and 6th day of 30 day storage treatment (0.0474±0.0083 h-1), respectively. The highest and lowest handling time was observed in eighth day of 30 day storage treatment (1.5849±0.1217 h) and in first day of control treatment (0.3155±0.0176 h), respectively. The lowest values of fecundity and egg hatch of the parasitoid as well as percentage of paralyzed host larvae were obtained in 30 day storage treatment.   
 

کلیدواژه‌ها [English]

  • parasitoid wasp
  • cold storage
  • parasitoid-host interaction
  • fecundity
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