مدل نمونه‌برداری دنباله‌ای با دقت ثابت شته گندم-یولاف،Sitobion avenae در مزارع گندم منطقه ماهیدشت کرمانشاه

نوع مقاله : حشره شناسی کشاورزی

نویسندگان

1 گروه گیاهپزشکی، دانشکده کشاورزی، دانشگاه رازی، کرمانشاه، ایران

2 عضو علمی دانشکاه رازی

3 موسسه تحقیقات گیاهپزشکی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

4 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان کرمانشاه، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرمانشاه، ایران

چکیده

پراکنش پهنه­ای شته گندم- یولاف، Sitobion avenae (F.) در مزارع گندم منطقه ماهیدشت کرمانشاه بررسی و مدل­های نمونه‌برداری دنباله‌ای با دقت ثابت برای پایش آن تهیه و نمونه‌برداری طی پنج سال انجام شد. در هر تاریخ نمونه‌برداری 100 ساقه به‌صورت تصادفی بازدید شد. دامنه میانگین تراکم جمعیت در مزرعه گندم 01/34- 39/0 عدد شته در هر ساقه بود. پراسنجه­های قانون نمایی تیلور برای تهیه مدل­های نمونه‌برداری دنباله‌ای به روشGreen (1970)  استفاده شدند. پراکنش پهنه­ای شته از نوع تجمعی تعیین شد. در مدل­های نمونه‌برداری، اندازه نمونه با افزایش میانگین تراکم جمعیت شته کاهش یافت. در مدل با سطح دقت تحقیقاتی (1/)0 اندازه نمونه لازم برای پایش جمعیت شته گندم- یولاف در بیشترین میانگین تراکم جمعیت مشاهده شده در مزرعه (01/34 عدد در هر ساقه) 136 عدد بود که در مدل با سطح دقت مدیریت تلفیقی آفات (25/0) به 22 عدد ساقه کاهش یافت. با توجه به بزرگ بودن اندازه نمونه در سطح دقت 1/0، مدل با سطح دقت مدیریت تلفیقی آفات برای پایش شته گندم - یولاف توصیه می‌شود که اندازه نمونه را نسبت به مدل نمونه‌برداری دنباله‌ای در سطح دقت 1/0، بیش از شش برابر کاهش داد.
 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Sequential sampling model with fixed precision level of the English grain aphid, Sitobion avenae in wheat fields of the Mahidasht region, Kermanshah

نویسندگان [English]

  • shahla Bagheri Matin 1
  • Hassanali Vahedi 2
  • Shahram Shahrokhi Khaneghah 3
  • Naser Moeeny Naghadeh 1
  • Farzad Jalilian 4
1 Department of Plant Protection, College of Agriculture, Razi University, Kermanshah, Iran
2 Plant protection, Agricultural college, Razi university
3 Iranian Research Institute of Plant Protection, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran
4 Agricultural and Natural Resources Research and Education Center of Kermanshah, AREEO, Kermanshah, Iran
چکیده [English]

Spatial distribution of the English grain aphid, Sitobion avenae (F.), was studied in wheat fields of Mahidasht, Kermanshah province and Sequential sampling models with fixed precision level were prepared for its monitoring. Sampling was conducted during five years. At each sampling date, 100 tillers were randomly visited. The mean range of population density in wheat field was 0.39-34.01 aphids/ tiller. Taylor's Power Law parameters were used to preparing sampling models according to Green (1970). Spatial distribution was determined as cumulative. Sample size decreased with increasing aphid population density in sampling models. In research precision level of (0.1), the sample size required at the highest average population density observed in the field (34.01/ tiller) was 136, which in precision level proposed for integrated pest management (0.25) reduced to 22 tillers. Overall, due to the large sample size at the precision level of 0.1, the model prepared at the precision level of integrated pest management (0.25) was recommended for monitoring S. avenae. The recommended model can reduce sample size more than six times at different densities in comparison to the sequential sampling model at the precision level of 0.1.
 

کلیدواژه‌ها [English]

  • Monitoring
  • population fluctuation
  • sequential sampling
  • the English grain aphid

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