Abstract
شته سیاه باقلا Aphis fabae Scopoli (Hemiptera: Aphididae) از آفات مهم مزارع چغندر در استان خوزستان میباشد. اطلاع از روشهای نمونهبرداری دقیق و مقرون به صرفه، در توسعه برنامههای مدیریت تلفیقی این آفت میتواند اهمیت اساسی داشته باشد. در این مطالعه، پراکنش فضایی این آفت در مزرعهای تحقیقاتی به مساحت یک هکتار در شهرستان شوش مورد بررسی قرار گرفت و یک برنامه نمونهبرداری دنبالهای با دقت ثابت برای تخمین جمعیت آن طراحی شد. نمونهبرداریها هر سه روز یکبار انجام شد و پراکنش فضایی جمعیت این شته روی بوتههای چغندر قند با استفاده از دو مدل تیلور و آیواوو مورد ارزیابی قرار گرفت. نوع پراکنش فضایی این آفت روی بوتههای چغندرقند تجمعی بود و شاخص تیلور با دادههای جمعیت این شته روی بوتههای چغندر قند برازش بهتری داشت. از این رو، مدل گرین برای توسعه برنامه نمونهبرداری دنبالهای با دقت ثابت این شته استفاده شد. تعداد بهینه نمونه مورد نیاز بسته به تراکم آفت، از 99 تا 130 بوته در سطح دقت 1/0 و 16 تا 21 بوته در سطح دقت 25/0 متفاوت بود. ترسیم خطوط توقف نمونهبرداری نشان داد که در سطوح دقت 25/0 و 1/0، نمونهبرداری از جمعیت آفت باید به ترتیب تا زمان رسیدن تعداد تجمعی شتهها به 10 و 25 شته در بوته ادامه یابد.
The black bean aphid, Aphis fabae Scopoli (Hemiptera: Aphididae) is an important pest of sugar beet fields in Khuzestan province. Knowledge about economic and precise sampling program can play critical role for developing integrated pest management (IPM) program of this pest. In this study, the spatial distribution of the pest was investigated in a research sugar, 1 ha, beet field of Shush district, and a fixed-precision sequential sampling program for estimating the aphid density was developed. Samplings were performed every 3 days and spatial distribution of this pest on sugar beet plants was evaluated using two models, Taylor's power law and Iwao's patchiness. The pest distribution on sugar beet plant was aggregated and Taylor's power law provided better fitness to the spatial distribution data of this aphid on sugar beet plants. Therefore, The Green's model was used for developing fixed-precision sequential sampling of the aphid. Based on the pest density, the optimum sample size ranged from 99-130 plants or 16-21 plants at desired precision level 0.1 or 0.25, respectively. Calculated stop lines implicated that the sampling has to be continued till the aphid cumulative number per sugar beet plant reach to 10 at precision level 0.25. The stop line was 25 aphids at precision 0.1.
The black bean aphid, Aphis fabae Scopoli (Hemiptera: Aphididae) is an important pest of sugar beet fields in Khuzestan province. Knowledge about economic and precise sampling program can play critical role for developing integrated pest management (IPM) program of this pest. In this study, the spatial distribution of the pest was investigated in a research sugar, 1 ha, beet field of Shush district, and a fixed-precision sequential sampling program for estimating the aphid density was developed. Samplings were performed every 3 days and spatial distribution of this pest on sugar beet plants was evaluated using two models, Taylor's power law and Iwao's patchiness. The pest distribution on sugar beet plant was aggregated and Taylor's power law provided better fitness to the spatial distribution data of this aphid on sugar beet plants. Therefore, The Green's model was used for developing fixed-precision sequential sampling of the aphid. Based on the pest density, the optimum sample size ranged from 99-130 plants or 16-21 plants at desired precision level 0.1 or 0.25, respectively. Calculated stop lines implicated that the sampling has to be continued till the aphid cumulative number per sugar beet plant reach to 10 at precision level 0.25. The stop line was 25 aphids at precision 0.1.
| Translated title of the contribution | Spatial dispersion and fixed-precision sequential sampling of black bean aphid, Aphis fabae (Hem.: Aphididae) in a sugar beet field |
|---|---|
| Original language | Persian |
| Pages (from-to) | 31-40 |
| Number of pages | 9 |
| Journal | Plant Pest Research |
| Volume | 13 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Sept 2023 |
| Externally published | Yes |
Bibliographical note
رجب پور, علی, & دیناروند, نعمت. (1402). تراکم، پراکنش فضایی و نمونهبرداری دنبالهای شته سیاه باقلا، Aphis fabae، در مزرعه چغندر قند. تحقیقات آفات گیاهی, 13(2), 31-40. doi: 10.22124/iprj.2023.25051.1527Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.
Keywords
- Iwao's patchiness
- IPM
- Sample size
- Spatial dispersion
- Taylor's power law
- IPM; Sample size