<p><strong>A population growth model of <em>Tetranychus urticae</em> Koch (Acari: Tetranychidae)</strong></p>
Two-spotted spider mite, Tetranychus urticae Koch is a serious pest of different crops over the world. Different strategies are used to regulate the population of this mite. To this end, as a first step, a population growth model has been developed for describing the dynamics of T. urticae populati...
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| Language: | English |
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Acarological Society of Iran
2018-04-01
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| Series: | Persian Journal of Acarology |
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| Online Access: | https://www.biotaxa.org/pja/article/view/36245 |
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| author | Azadeh Farazmand Masood Amir-Maafi |
| author_facet | Azadeh Farazmand Masood Amir-Maafi |
| author_sort | Azadeh Farazmand |
| collection | DOAJ |
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Two-spotted spider mite, Tetranychus urticae Koch is a serious pest of different crops over the world. Different strategies are used to regulate the population of this mite. To this end, as a first step, a population growth model has been developed for describing the dynamics of T. urticae population growth. In this regard, the population abundance of T. urticae was estimated weekly from 29 June to 29 September 2016 at two bean fields, each field was planted with Goli and Akhtar cultivars, separately. During each sampling period in each field, 30 plants were randomly chosen and a leaf was selected as a sample unit from the middle of a plant, then a simple population growth model was constructed for T. urticae on two bean cultivars. The result showed that T. urticae had a distinct seasonal pattern of abundance but differed between two cultivars. A logistic growth model was developed based on relationship between the cumulative density of T. urticae and time (day) and demonstrated high prediction capability for T. urticae population on Goli (R2 = 0.99) and Akhtar (R2 = 0.99) cultivars. According to the logistic equation, carrying capacity was recorded 463.9 ± 9.73 (mite/leaf) and 59.67 ± 8.72 (mite/leaf) on Goli and Akhtar cultivars, respectively. Furthermore, it has been shown that the logistic growth model can be used to make population predictions. The model parameters estimated for two different cultivars, providing a new mathematical tool for ecologists to predict two-spotted spider mite outbreaks, and ultimately to develop effective two-spotted spider mite control strategies.
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| format | Article |
| id | doaj-art-b614b9745f4c458dab08d6faa1a5df54 |
| institution | Kabale University |
| issn | 2251-8169 |
| language | English |
| publishDate | 2018-04-01 |
| publisher | Acarological Society of Iran |
| record_format | Article |
| series | Persian Journal of Acarology |
| spelling | doaj-art-b614b9745f4c458dab08d6faa1a5df542025-08-20T03:48:22ZengAcarological Society of IranPersian Journal of Acarology2251-81692018-04-017210.22073/pja.v7i2.36245<p><strong>A population growth model of <em>Tetranychus urticae</em> Koch (Acari: Tetranychidae)</strong></p>Azadeh Farazmand0Masood Amir-Maafi1Iranian Research Institute of Plant ProtectionIranian Research Institute of Plant Protection Two-spotted spider mite, Tetranychus urticae Koch is a serious pest of different crops over the world. Different strategies are used to regulate the population of this mite. To this end, as a first step, a population growth model has been developed for describing the dynamics of T. urticae population growth. In this regard, the population abundance of T. urticae was estimated weekly from 29 June to 29 September 2016 at two bean fields, each field was planted with Goli and Akhtar cultivars, separately. During each sampling period in each field, 30 plants were randomly chosen and a leaf was selected as a sample unit from the middle of a plant, then a simple population growth model was constructed for T. urticae on two bean cultivars. The result showed that T. urticae had a distinct seasonal pattern of abundance but differed between two cultivars. A logistic growth model was developed based on relationship between the cumulative density of T. urticae and time (day) and demonstrated high prediction capability for T. urticae population on Goli (R2 = 0.99) and Akhtar (R2 = 0.99) cultivars. According to the logistic equation, carrying capacity was recorded 463.9 ± 9.73 (mite/leaf) and 59.67 ± 8.72 (mite/leaf) on Goli and Akhtar cultivars, respectively. Furthermore, it has been shown that the logistic growth model can be used to make population predictions. The model parameters estimated for two different cultivars, providing a new mathematical tool for ecologists to predict two-spotted spider mite outbreaks, and ultimately to develop effective two-spotted spider mite control strategies. https://www.biotaxa.org/pja/article/view/36245Bean cultivarscarrying capacitylogistic equationpopulation dynamicstwo-spotted spider mite. |
| spellingShingle | Azadeh Farazmand Masood Amir-Maafi <p><strong>A population growth model of <em>Tetranychus urticae</em> Koch (Acari: Tetranychidae)</strong></p> Persian Journal of Acarology Bean cultivars carrying capacity logistic equation population dynamics two-spotted spider mite. |
| title | <p><strong>A population growth model of <em>Tetranychus urticae</em> Koch (Acari: Tetranychidae)</strong></p> |
| title_full | <p><strong>A population growth model of <em>Tetranychus urticae</em> Koch (Acari: Tetranychidae)</strong></p> |
| title_fullStr | <p><strong>A population growth model of <em>Tetranychus urticae</em> Koch (Acari: Tetranychidae)</strong></p> |
| title_full_unstemmed | <p><strong>A population growth model of <em>Tetranychus urticae</em> Koch (Acari: Tetranychidae)</strong></p> |
| title_short | <p><strong>A population growth model of <em>Tetranychus urticae</em> Koch (Acari: Tetranychidae)</strong></p> |
| title_sort | p strong a population growth model of em tetranychus urticae em koch acari tetranychidae strong p |
| topic | Bean cultivars carrying capacity logistic equation population dynamics two-spotted spider mite. |
| url | https://www.biotaxa.org/pja/article/view/36245 |
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