Important predaceous insects of citrus aphids (Hemiptera: Aphididae) in the north of Iran

Document Type: Full Article

Authors

1 Department of Plant Protection, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Ahwaz, I. R. Iran

2 Horticultural Science Research Institute, Citrus and Subtropical Fruits Research Center, Agricultural Research Education and Extension Organization (AREEO), Ramsar, I. R. Iran

3 Department of Plant Productions and Genetics, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Ahwaz, I. R. Iran

Abstract

ABSTRACT- Several species of aphids cause severe damage to citrus in the north of Iran. Predatory insects play an important role in biological control of the pests in citrus orchards. In this study, potential predatory insects of citrus aphids, Aphis spiraecola, A. gossypii and Toxoptera aurantii, were identified and their seasonal population dynamics on Citrus unshiu and C. sinensis were investigated during 2016-2017. Overall, four species were identified as dominant predatory insects of citrus aphids in Mazandaran province including Xanthogramma pedissequum (Syrphidae), Scymnus subvillosus, Coccinella septempunctata (Coccinellidae), and Aphidoletes aphidomyza (Cecidomyiidae). Among these species, X. pedissequum and S. subvillossus were more abundant predators in the C. sinensis and C. unshiu orchards compared to the two other species. The predatory insects were observed when means of environmental temperature was about 15-20ºC. Population fluctuations, population densities and presence periods of the predatory insects were different on the two host plants. Results of this study can be used in integrated pest management programs of citrus aphids in citrus orchards in the north of Iran.

Keywords


Article Title [Persian]

حشرات مهم شکارگر شته‌های مرکبات (Hemiptera: Aphididae) در شمال ایران

Authors [Persian]

  • فرزانه علیزاده کافشانی 1
  • علی رجب پور 1
  • سیروس آقاجانزاده 2
  • اسماعیل غلامیان 2
  • محمد فرخاری 3
1 گروه گیاه پزشکی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ملاثانی، اهواز، ج. ا. ایران.
2 انستیتو تحقیقاتی علوم باغبانی، مرکز تحقیقات مرکبات و میوه‌های نیمه گرمسیری، سازمان تحقیق، آموزش و تریج کشاورزی (AREEO)، رامسر، ج. ا. ایران.
3 گروه مهندسی تولید و ژنتیک گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ملاثانی، اهواز، ج. ا. ایران.
Abstract [Persian]

چکیده – بسیاری از گونه­های شته­ها موجب خسارت شدید مرکبات در شمال ایران می­شوند. حشرات شکارگر نقش مهمی در کنترل طبیعی این آفات در باغات مرکبات دارند. در این مطالعه، حشرات مهم شکارگر شته­های مرکبات (Aphis spiraecola، A. gossypii و Toxoptera aurantii) شناسایی شدند و تغییرات فصلی جمعیت آنها روی نارنگی انشو (Citrus unshiu)و پرتقال تامسون ناول (Citrus sinensis) در طی سال­های 1394-1396 مورد ارزیابی قرار گرفت. درکل، چهارگونه شامل   Xanthogramma pedissequum (Syrphidae)، Scymnus subvillosus، و Coccinella septempunctata (Coccinellidae) و Aphidoletes aphidomyza (Cecidomyiidae) به عنوان حشرات شکارگر مهم شته­های مرکبات در استان مازندران شناسایی شدند.  در میان این­ها، گونه­های X. pedissequum  و S. subvillosusفراوان­ترین حشرات شکارگر روی درختان نارنگی انشو و پرتقال تامسون ناول بودند. این حشرات شکارگر زمانی که میانگین دمای محیط بین 15 تا 20 درجه سانتی­گراد بود، حضور داشتند. نوسانات جمعیت، تراکم­های جمعیت و دوره حضور این حشرات شکارگر روی دو میزبان گیاهی متفاوت بود. نتایج این تحقیق می تواند در برنامه­های کنترل تلفیقی آفات شته­های مرکبات در باغات شمال کشور مورد استفاده قرار گیرد.

Keywords [Persian]

  • Aphididae
  • شرایط محیطی
  • میزبان‌های گیاهی
  • نوسانات جمعیت
  • شکارگران
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