تاثیر ذخیره‌سازی در سرما بر ویژگی‌های زیستی و مرفولوژیکی زنبور پارازیتوئید Aenasius bambawalei (Hym.: Encyrtidae)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ملاثانی، ایران

2 گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران

چکیده

نگهداری در سرما یک روش مفید برای افزایش دوره زنده ­مانی زنبورهای پارازیتوئید محسوب می­شود، هرچند ممکن است بر توانایی زنده­ مانی و تخمریزی موفق آنها تاثیر منفی داشته باشد. در این مطالعه تاثیر نگهداری مراحل زیستی لارو و شفیره زنبور پارازیتوئید Aenasius bambawalei در دمای 4 درجه سلسیوس به مدت دو و چهار هفته بر طول دوره رشدی، نرخ ظهور و طول عمر افراد بالغ، نسبت جنسی و مشخصات مرفومتریک آنها مورد بررسی قرار گرفت. بیشترین میزان ظهور حشرات بالغ (72%) در شفیره‌هایی که به مدت دو هفته در سرما نگهداری شدند مشاهده شد. در ماده ­ها کوتاه ترین (4/8 روز) و طولانی ­ترین (4/11 روز) طول دوره رشدی پس از نگهداری در سرما، به­ ترتیب در شفیره و لاروهای سن ­آخرکه به­ مدت دو هفته درسرما نگهداری شده بودند، مشاهده شد. این روند در نرها نیز مشابه  بود و شفیره ­ها و لاروهایی که به مدت دو هفته معرض سرما نگهداری شده بودند، به ­ترتیب کوتاهترین (10 روز) و طولانی­ ترین (8/11 روز) طول دوره رشدی را نشان دادند. نسبت جنسی  و طول عمر افراد بالغ با افزایش طول دوره سرمانگهداری مراحل نابالغ به طور معنی ­داری کاهش یافت. همچنین طول ساق پای عقب و طول شاخک در مقایسه با تیمار شاهد کاهش نشان داد. براساس این نتایج، سرمانگهداری شفیره ­ها به مدت دو هفته برای افزایش زنده ­مانی حشرات بالغ توصیه می­ شود؛ زیرا نگهداری طولانی­ مدت شفیره­ ها و همچنین نگهداری مرحله لاروی زنبور پارازیتوئید A. bambawalei در سرما بر شایستگی ­های حشرات بالغ تاثیر منفی دارد.  

کلیدواژه‌ها


عنوان مقاله [English]

Effect of cold storage on biological and morphological characteristics of the parasitoid wasp, Aenasius bambawalei (Hym.: Encyrtidae)

نویسندگان [English]

  • N. Zandi Sohani 1
  • E. Tamoli torfi 2
1 Department of Plant Protection, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzastan, Mollasani, Iran
2 Department of Plant Protection, College of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده [English]

Cold storage is a valuable technique for extending the survival time of parasitoid wasps, but it may have a detrimental impact on their survival and successful oviposition. In this study, we investigated the effect of cold storage of the larval and pupal stages of Aenasius bambawalei at 4°C for two and four weeks on their post-storage developmental time, adult emergence and longevity, female sex ratio, and morphometric characteristics. The highest emergence rate (72%) was observed in pupae after two weeks of cold treatment. In females, the shortest (8.40 days) and the longest (11.40 days) developmental time were seen in pupae and larvae exposed to two weeks of cold treatment, respectively. This trend was also similar in males, and the pupae and larvae subjected to two weeks of cold treatment showed the shortest (10 days) and the longest (11.8 days) developmental period, respectively. The sex ratio and adult longevity decreased significantly with the increase of immature stages’ cold storage period. Additionally, the length of the hind tibia and antennae decreased compared to the control. Based on these findings, we recommend two weeks of A. bambawalei pupae cold storage to increase the survival time of the parasitoid, as cold storage of larvae as well as long period cold storage of pupae, may have negative effects on the adult's fitness.

کلیدواژه‌ها [English]

  • Biological control
  • cotton mealybug
  • morphometric
  • sex ratio
  • survival
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