نوع مقاله : مقاله پژوهشی


1 گروه گیاهپزشکی، دانشگاه رازی، کرمانشاه

2 دانش‌آموخته‌ی مقطع دکتری و پژوهشگر پسادکتری گروه گیاهپزشکی، دانشکده کشاورزی، دانشگاه رازی، کرمانشاه، ایران.

3 دانشگاه رازی هیئت علمی

4 استادیار، گروه گیاه‌پزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی کرمانشاه، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرمانشاه، ایران


سنک بذرخوار کلزا، Nysius cymoides (Spinola, 1837) (Hem., Lygaeida)، حشره‌ای پلی‌فاژ و دارای پراکنش جهانی است و در حال حاضر به عنوان مهم‌ترین آفت در مزارع کلزا استان کرمانشاه باعث خسارت می‌شود. در مطالعه حاضر تغییرات جمعیت و توزیع فضایی آفت در مزارع کلزا استان کرمانشاه طی سال‌های 1399 و 1400 مورد بررسی قرار گرفت. نتایج این مطالعه نشان داد که اولین گروه از جمعیت سنک بذرخوار کلزا در سال‌های 1399 و 1400 به ترتیب در روز هشتم و یازدهم اردیبهشت ماه مشاهده شدند. دومین زمان اوج جمعیت سنک کلزا در سال‌های 1399 و 1400 به ترتیب با میانگین 31/66 ± 22/372 و 58/4 ± 45/126 حشره کامل در هر واحد نمونه‌برداری در دوم تیر ماه و بیست و نهم خرداد ماه به دست آمد. بیش‌ترین تراکم جمعیت پوره‌ها در سال‌های 1399 و 1400 به ترتیب با میانگین 19/125 ± 50/1263 و 91/3 ± 00/206 پوره در هر واحد نمونه‌برداری در دوم تیر ماه به دست آمد. در سال 1399، توزیع فضایی حشرات نر، ماده و کل بالغین سنک بذرخوار کلزا بر اساس روش تیلور از نوع تجمعی و توزیع فضایی مراحل مختلف پورگی، حشرات نر، ماده و بالغ سنک بر اساس روش آیوائو تصادفی بود. در سال 1400، توزیع فضایی مراحل پورگی، حشرات ماده و بالغ سنک بر اساس هر دو روش تیلور و آیوائو از نوع تصادفی به دست آمد. به طور کلی نتایج این مطالعه نشان داد که حشرات کامل و پوره‌های سنک بذرخوار کلزا دارای دو پیک جمعیتی بودند.


عنوان مقاله [English]

Population fluctuations and spatial distribution of the canola false chinch bug, Nysius cymoides (Hem., Lygaeidae) in Kermanshah

نویسندگان [English]

  • Abbas Ali Zamani 1
  • Hamidreza Pourian 1
  • Behzad Miri 2
  • Marzieh Alizadeh 1
  • Naser Moeini Naghadeh 3
  • Farzad Jalilian 4
  • Zahra Dehnavi 1
  • Zohreh Sharifi 1
  • Mahdieh Hemmati 1

1 1. Department of Plant Protection, College of Agriculture, Razi University

2 1- Ph.D. Graduated and Postdoctoral researcher, Department of Plant Protection, College of Agriculture, Razi University, Kermanshah, Iran.

3 1. Department of Plant Protection, College of Agriculture, Razi University

4 Assistant Professor, Plant Protection Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, IRAN

چکیده [English]

The false chinch bugs, Nysius cymoides (Spinola) (Hem., Lygaeidae) is a polyphagous and cosmopolitan distributed and it causes damage as the most important pest in canola fields in Kermanshah province in the recent years. In the present study, population fluctuations and spatial distribution of the pest were investigated in canola fields of Kermanshah province during 2020 and 2021 years. The results of this study showed that the first group of the false chinch bugs populations in 2020 and 2021 were observed on the 8 and 11th of April, respectively.The second population peak of the pest in 2020 and 2021 with an average of 372.22 ± 66.31 and 126.45 ± 4.58 was obtained on 22 and 19th June, respectively. The highest population density of nymphs in 2020 and 2021 with an average of 1263.50 ± 125.19 and 206.00 ± 3.91 was obtained on 23th June. The results of spatial distribution showed that in 2020, the spatial distribution of males, females and adults of the N. cymoides was recognized as aggregated based on Taylor’s power law method and as random based on Iwao’s patchiness regression method. In general, the results of this study showed that N. cymoides had two population peaks. Also, based on goodness of fit, the Iwao’s patchiness method was more suitable than the Taylor’s power law method for estimating the spatial distribution of the pest.

کلیدواژه‌ها [English]

  • Nysius cymoides
  • canola
  • spatial distriburion
  • Kermanshah
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