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Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine

The analysis of spatial distribution of the psyllid Diaphorina citri (Homoptera: Psyllidae) on citrus and orange jasmine analyzed using various mathematical indices of dispersion and regression models showed an aggregated distribution. Taylor’s power law and Iwao’s regression model fitted very well...

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Main Authors: Soemargono, Albertus, Ibrahim, Yusof, Ibrahim, Rohani, Osman, Mohammad Shamsudin
Format: Article
Language:English
Published: Penerbit Universiti Sains Malaysia 2008
Online Access:http://psasir.upm.edu.my/id/eprint/51948/1/Spatial%20distribution%20of%20the%20Asian%20citrus%20psyllid.pdf
http://psasir.upm.edu.my/id/eprint/51948/
http://www.tlsr.usm.my/TLSRvol19no2.html
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spelling my.upm.eprints.519482017-05-04T04:28:44Z http://psasir.upm.edu.my/id/eprint/51948/ Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine Soemargono, Albertus Ibrahim, Yusof Ibrahim, Rohani Osman, Mohammad Shamsudin The analysis of spatial distribution of the psyllid Diaphorina citri (Homoptera: Psyllidae) on citrus and orange jasmine analyzed using various mathematical indices of dispersion and regression models showed an aggregated distribution. Taylor’s power law and Iwao’s regression model fitted very well to all data sets, while the regression of k = c + dm [k = m2/(s2 – m)] was an inadequate model for the aggregation of the citrus psyllid since k was unstable and dependent upon the density of the insect. In general, Taylor’s power law fitted the data better, yielding higher values of R2 than the Iwao’s model for all cases, whether citrus only, orange jasmine only or pooled. The population of D. citri on the tree quadrants, i.e. north, west, south and east, did not differ significantly. However, distribution between the upper and lower half of the canopy was significantly different where the upper canopy harbored more psyllids than the lower half. Penerbit Universiti Sains Malaysia 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/51948/1/Spatial%20distribution%20of%20the%20Asian%20citrus%20psyllid.pdf Soemargono, Albertus and Ibrahim, Yusof and Ibrahim, Rohani and Osman, Mohammad Shamsudin (2008) Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine. Journal of Bioscience, 19 (2). pp. 9-19. ISSN 1985-3718; ESSN: 2180-4249 http://www.tlsr.usm.my/TLSRvol19no2.html
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description The analysis of spatial distribution of the psyllid Diaphorina citri (Homoptera: Psyllidae) on citrus and orange jasmine analyzed using various mathematical indices of dispersion and regression models showed an aggregated distribution. Taylor’s power law and Iwao’s regression model fitted very well to all data sets, while the regression of k = c + dm [k = m2/(s2 – m)] was an inadequate model for the aggregation of the citrus psyllid since k was unstable and dependent upon the density of the insect. In general, Taylor’s power law fitted the data better, yielding higher values of R2 than the Iwao’s model for all cases, whether citrus only, orange jasmine only or pooled. The population of D. citri on the tree quadrants, i.e. north, west, south and east, did not differ significantly. However, distribution between the upper and lower half of the canopy was significantly different where the upper canopy harbored more psyllids than the lower half.
format Article
author Soemargono, Albertus
Ibrahim, Yusof
Ibrahim, Rohani
Osman, Mohammad Shamsudin
spellingShingle Soemargono, Albertus
Ibrahim, Yusof
Ibrahim, Rohani
Osman, Mohammad Shamsudin
Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine
author_facet Soemargono, Albertus
Ibrahim, Yusof
Ibrahim, Rohani
Osman, Mohammad Shamsudin
author_sort Soemargono, Albertus
title Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine
title_short Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine
title_full Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine
title_fullStr Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine
title_full_unstemmed Spatial distribution of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae) on citrus and orange jasmine
title_sort spatial distribution of the asian citrus psyllid, diaphorina citri kuwayama (homoptera: psyllidae) on citrus and orange jasmine
publisher Penerbit Universiti Sains Malaysia
publishDate 2008
url http://psasir.upm.edu.my/id/eprint/51948/1/Spatial%20distribution%20of%20the%20Asian%20citrus%20psyllid.pdf
http://psasir.upm.edu.my/id/eprint/51948/
http://www.tlsr.usm.my/TLSRvol19no2.html
_version_ 1643835103731777536
score 13.211869

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