Influence of drought and temperature on population density of two species of spider mites and their predator Scolothrips longicornis in almond orchards
High temperatures and low-humidity are the favorable conditions for spider mites, Tetranychus urticae Koch and Schizotetranychus smirnovi Wainstein, to cause serious threat to quality and quantity of almond. This study was undertaken to understand population changes of the spider mites during the no...
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| Format: | Article |
| Language: | English |
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Entomological Society of Iran
2023-02-01
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| Series: | نامه انجمن حشرهشناسی ایران |
| Subjects: | |
| Online Access: | https://jesi.areeo.ac.ir/article_128060_f5ebb184d23b72e7a51d39d5bd44dba5.pdf |
| _version_ | 1828038101348384768 |
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| author | Zarir Saeidi |
| author_facet | Zarir Saeidi |
| author_sort | Zarir Saeidi |
| collection | DOAJ |
| description | High temperatures and low-humidity are the favorable conditions for spider mites, Tetranychus urticae Koch and Schizotetranychus smirnovi Wainstein, to cause serious threat to quality and quantity of almond. This study was undertaken to understand population changes of the spider mites during the normal and dry years and to predict the possibility of the pest outbreak in order to develop a successful integrated management strategy. Population fluctuations of S. smirnovi and T. urticae were studied on almond (Mamaei variety), from April to October of 2007-2009, in Saman orchards, Chaharmahal va Bakhtiari province, Iran. Meteorological data of three nearest synoptic stations including Saman, Zaman khan and Shahre-kord were collected from the Chaharmahal va Bakhtiari meteorological organization. The Standardized Precipitation Index (SPI) was used to detect meteorological droughts based on the monthly rainfall input data of three synoptic stations. The results showed the year 2008 as an extremely dry year, while revealing 2007 and 2009 as normal years. Comparison of spider mite population density in this year (SPI < -2) with the normal years, 2007 (SPI = -0.53) and 2009 (SPI= 0.41), showed a significant increase in the population density of, S. smirnovi, (14.65 and 2.95 times) and T. urticae (7.28 and 2.87 times) compared to 2007 and 2009, respectively. Spearman’s correlation analysis showed significant negative correlation of mean precipitation with population density of, S. smirnovi, (r = -0.65, p=0.022), T. urticae (r = -0.73, p=0.0001), and the predatory thrips, Scolothrips longicornis Priesner, (r = -0.67, p=0.0001) during three studied years. In the drought year, the phytophagous mite’s population increased in response to high temperatures and low humidity. In a such year, the almond trees can be more vulnerable to mite damages and control is necessary. |
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| issn | 0259-9996 2783-3968 |
| language | English |
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| publisher | Entomological Society of Iran |
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| series | نامه انجمن حشرهشناسی ایران |
| spelling | doaj.art-f9b911a9207d46c992589cf2d43a4d2e2023-02-09T16:00:12ZengEntomological Society of Iranنامه انجمن حشرهشناسی ایران0259-99962783-39682023-02-0142317318210.52547/jesi.42.3.1128060Influence of drought and temperature on population density of two species of spider mites and their predator Scolothrips longicornis in almond orchardsZarir Saeidi0Dept. of Plant Protection, Agricultural and Natural Resources Research and Education Center, Chaharmahal va Bakhtiari, Shar -e- Kord, IranHigh temperatures and low-humidity are the favorable conditions for spider mites, Tetranychus urticae Koch and Schizotetranychus smirnovi Wainstein, to cause serious threat to quality and quantity of almond. This study was undertaken to understand population changes of the spider mites during the normal and dry years and to predict the possibility of the pest outbreak in order to develop a successful integrated management strategy. Population fluctuations of S. smirnovi and T. urticae were studied on almond (Mamaei variety), from April to October of 2007-2009, in Saman orchards, Chaharmahal va Bakhtiari province, Iran. Meteorological data of three nearest synoptic stations including Saman, Zaman khan and Shahre-kord were collected from the Chaharmahal va Bakhtiari meteorological organization. The Standardized Precipitation Index (SPI) was used to detect meteorological droughts based on the monthly rainfall input data of three synoptic stations. The results showed the year 2008 as an extremely dry year, while revealing 2007 and 2009 as normal years. Comparison of spider mite population density in this year (SPI < -2) with the normal years, 2007 (SPI = -0.53) and 2009 (SPI= 0.41), showed a significant increase in the population density of, S. smirnovi, (14.65 and 2.95 times) and T. urticae (7.28 and 2.87 times) compared to 2007 and 2009, respectively. Spearman’s correlation analysis showed significant negative correlation of mean precipitation with population density of, S. smirnovi, (r = -0.65, p=0.022), T. urticae (r = -0.73, p=0.0001), and the predatory thrips, Scolothrips longicornis Priesner, (r = -0.67, p=0.0001) during three studied years. In the drought year, the phytophagous mite’s population increased in response to high temperatures and low humidity. In a such year, the almond trees can be more vulnerable to mite damages and control is necessary.https://jesi.areeo.ac.ir/article_128060_f5ebb184d23b72e7a51d39d5bd44dba5.pdfspider mitedrought indexclimate conditionalmondpopulation fluctuations: |
| spellingShingle | Zarir Saeidi Influence of drought and temperature on population density of two species of spider mites and their predator Scolothrips longicornis in almond orchards نامه انجمن حشرهشناسی ایران spider mite drought index climate condition almond population fluctuations: |
| title | Influence of drought and temperature on population density of two species of spider mites and their predator Scolothrips longicornis in almond orchards |
| title_full | Influence of drought and temperature on population density of two species of spider mites and their predator Scolothrips longicornis in almond orchards |
| title_fullStr | Influence of drought and temperature on population density of two species of spider mites and their predator Scolothrips longicornis in almond orchards |
| title_full_unstemmed | Influence of drought and temperature on population density of two species of spider mites and their predator Scolothrips longicornis in almond orchards |
| title_short | Influence of drought and temperature on population density of two species of spider mites and their predator Scolothrips longicornis in almond orchards |
| title_sort | influence of drought and temperature on population density of two species of spider mites and their predator scolothrips longicornis in almond orchards |
| topic | spider mite drought index climate condition almond population fluctuations: |
| url | https://jesi.areeo.ac.ir/article_128060_f5ebb184d23b72e7a51d39d5bd44dba5.pdf |
| work_keys_str_mv | AT zarirsaeidi influenceofdroughtandtemperatureonpopulationdensityoftwospeciesofspidermitesandtheirpredatorscolothripslongicornisinalmondorchards |