فراسنجه‌های زیستی شته مومی کلم، Brevicoryne brassicae (L.) در مواجهه با غلظت زیرکشنده (LC25) کلرفلوآزورون

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه ارومیه، ارومیه، ایران

2 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان آذربایجان غربی، سازمان تحقیقات آموزش و ترویج کشاورزی، ارومیه، ایران

چکیده

شته مومی کلم Brevicoryne brassicae (L.) از آفات مهم و اقتصادی محصولات چلیپایی در ایران است. یکی از روش­های اصلی و اولیه برای دفاع از گیاهان در برابر شته­ها استفاده از آفت­کش­های شیمیایی است. با توجه به توصیه کاربرد حشره­کش کلرفلوآزورون علیه بید کلم، در پژوهش حاضر تاثیر کشنده و زیرکشنده آن روی شته مومی کلم بررسی شد تا امکان تلفیق کنترل ارزیابی شود. روش مورد استفاده در انجام آزمایش­ها پاشش ترکیبات آفت­کش روی صفحه­های برگی حاوی شته بود. برای بررسی اثر زیرکشنده آفت­کش روی شته از غلظت LC25 محاسبه­شده (60/105پی­پی­ام) استفاده شد. نتایج نشان داد طول عمر و باروری شته­های بالغ تیمار شده به­طور قابل­توجهی تحت تأثیر غلظت زیرکشنده قرار گرفتند. طول عمر کل از 78/12 روز در شاهد به 14/8 روز در غلظت زیرکشنده کاهش یافت. داده­های تحقیق حاضر نشان داد که غلظت زیرکشنده، نتاج شته­های کلم تیمار شده را نیز تحت تأثیر قرار می­دهد. غلظت زیرکشنده آفت­کش مورد مطالعه، مقادیر نرخ ذاتی افزایش جمعیت (r) را در مقایسه با شاهد کاهش داد. سایر فراسنجه­های رشد جمعیت مانند نرخ خالص تولید­مثل (R0) ، نرخ متناهی افزایش جمعیت (λ) و نرخ ناخالص تولید­مثل (GRR) نیز به­طور معنی­داری نسبت به شاهد کمتر بودند. کاهش نرخ رشد در غلظت زیرکشنده باعث افزایش میانگین مدت زمان یک نسل (T) شد. بر اساس یافته­های پژوهش حاضر، در صورت همزمانی حضور شته مومی کلم و بیدکلم در شرایط مزرعه، کاربرد آفت­کش کلرفلوآزورون برای کنترل آفت توصیه شده (بیدکلم) می­تواند در مدیریت جمعیت شته مومی کلم نیز موثر باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Biological parameters of the cabbage aphid, Brevicoryne brassicae, encountering the sublethal concentration (LC25) of chlorfluazuron

نویسندگان [English]

  • H. Rajabi 1
  • S. A. Safavi 1
  • M. Fourouzan 2
1 Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran
2 Agricultural and natural resources research center of west Azarbaijan, AREEO, Urmia, Iran
چکیده [English]

Brevicoryne brassicae (L.) is one of the important and economic pests of Cole crops in Iran. One of the main methods to protect plants against aphids is using chemical pesticides. In this study, the sublethal effects of Chlorfluazuron was evaluated on the population growth parameters of cabbage aphid under greenhouse condition. The method used in the experiments was insecticide spraying on the leaves containing aphids. LC25 (105.60 ppm) concentration was used to investigate the sublethal effect of insecticides on aphid. The results showed that lifespan/longevity and fertility of the treated adult aphids were significantly affected by the sublethal concentration. Total longevity reduced from 12.78 days in control treatment to 8.14 days in sublethal concentration. The results of present study indicated that sublethal concentration also affected progeny of treated adult aphids. Accordingly, the sublethal concentration of the studied insecticide decreased the values of the intrinsic rate of increase (r) compared to the control treatment. Other population growth parameters such as net reproductive rate (R0), finite rate of increase (λ) and gross reproductive rate (GRR) were also significantly lower than the control. Decreasing the growth rate in sublethal treatment increased mean generation time (T). Based on research findings, Chlorfluazuron can be suitable for use in the management of the cabbage aphid, other than the recommended pest (diamondback moth).

کلیدواژه‌ها [English]

  • Cabbage aphid
  • Chlorfluazuron
  • Intrinsic rate of increase
  • Sublethal effects

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تحقیقات آفات گیاهی
دوره 12، شماره 2
شهریور 1401
صفحه 21-34

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  • تاریخ دریافت: 25 شهریور 1401
  • تاریخ پذیرش: 25 شهریور 1401

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