Biotypes and spatial distribution of Tylenchulus semipenetrans in Southern Iran
References
- Abd-Elgawad, M. M. M. 2021. Optimizing sampling and extraction methods for plant-parasitic and entomopathogenic nematodes. Plants 10:629. https://doi.org/10.3390/plants10040629.
- Abiverdi, C., Izadpanah, K., and Sharafeh, M. 1970. Plant parasitic nematodes associated with citrus decline in southern Iran. Plant Disease Reports 56:186–188.
- Ahmadi, K., Ebadzadeh, H., Hatami, F., Afruzi, Sh., Taleghani, R., Yari, Sh., and Kalantari, M. 2021. Iranian Agricultural Statistics in 2019-2020 Crop Years, Part III Gardening Products. Tehran: Agricultural Ministry Press.
- Arnaudova, Z., and Bileva, T. 2011. The use of GIS to support sustainable management of vineyards in Plovdiv, Bulgaria. Communications in Agricultural and Applied Biological Sciences 76:355–361.
- Asrari, E., and Masoudi, M. 2010. Hazard assessment of climate changes, a case study area: Fars Province, Iran. International Pollution Research 29:275–281.
- Asefjah, B., Esmaeilpour, Y., Bazrafshan, O., Keshtkar, A., and Zamani, H. 2022. Land degradation trend in the climatic types of Fars Province using remote sensing and climatic variables. Journal of Ecohydrology 9:833–851. https://doi.org/10.22059/ije.2023.353644.1707.
- Ayazpour, K., and Ghanaatian, A. 2004. Determination of root parasite nematodes of citrus in Jahrom (Fars Province, Iran). M.S. thesis, Islamic Azad University of Jahrom, Iran.
- Baines, R. C., Cameron, J. W., and Soost, R. K. 1974. Four biotypes of Tylenchulus semipenetrans in California identified, and their importance in the development of resistant citrus rootstocks. Journal of Nematology 6:63–66.
- Baines, R. C., Miyakawa, T., Cameron, V., and Small, R. H. 1969. Infectivity of two biotypes of the citrus nematode on citrus and some other hosts. Journal of Nematology 1:150–159.
- Bello, A., Navas, A., and Belart, C. 1986. Nematodes of citrus groves in the Spanish Levanter Ecological study focused to their control. in: R. Cavalloro, and E. Di Martino, eds. Integrated Pest Control in Citrus groves, Florida: CRC Press, pp. 217–226. https://doi.org/10.1201/9781003079279-34.
- Benmoshe, N. 2025. A simple solution for the Inverse Distance Weighting interpolation (IDW) clustering problem. Science 7:30. https://doi.org/10.3390/sci7010030.
- Biau, G. 2012. Analysis of a random forests model. The Journal of Machine Learning Research 13:1063–1095.
- Boogert, P. V. D., Velvis, H., Ettema, C. H., and Bouwman, L. A. 1994. The role of organic matter in the population dynamics of the endoparasitic nematophagous fungus, Drechmaria coniospora in microcrosms. Nematologica 7:139–145.
- Breiman, L. 2001. Random forests. Machine Learning 45:5–32. https://doi.org/10.1023/A:1010933404324.
- Cadet, P., Berry, S. D., and Spaull, V. W. 2004. Mapping of interactions between soil factors and nematodes. European Journal of Soil Biology 40:77–86. https://doi.org/10.1163/003525994x00175.
- Cardoso, M. O., Pedrosa, E. M. R., Rolim, M. M., Silva, E. F. F., and Barros, P. A. 2012. Effects of soil mechanical resistance on nematode community structure under conventional sugarcane and remaining of Atlantic Forest. Environmental Monitoring & Assessment 184:3529–3544. https://doi.org/10.1007/s10661-011-2206-4.
- Carvalho, R. P., Guerra, C., Cano-Díaz, C., Mendes, S., and Costa, S. R. 2025. Distribution of plant-parasitic nematode communities across land-use types in the North of Portugal. Applied Soil Ecology 206:105852. https://doi.org/10.1016/j.apsoil.2024.105852.
- Castle, W. S. 1980. Root system distribution of citrus trees in Florida. Proceedings of the Florida State Horticultural Society 93:9–12.
- Castro, C. E., Belser, N. O., McKinney, H. E., and Thomason, I. J. 1990. strong repellency of the root knot nematode, Meloidogyne incognita by specific inorganic ions. Journal of Chemical Ecology 16:1199–1205. https://doi.org/10.1007/BF01021019.
- Cohn, E., Hough, A., and Mulder, N. 1976. Elimination of nematodes and other plant pathogens from irrigation water by filtration techniques, in: 13th International Nematology Symposium. Dublin: Ireland.
- Davide, R. G. 1971. Survey of the distribution of different plant parasitic nematodes associated with the citrus decline in the Philippines, a report of NSDB project No. 2203. University of Philippines: Laguna.
- Davis, R. M. 1984. Distribution of Tylenchulus semipenetrans in a Texas grapefruit orchard. Journal of Nematology 16:313–317.
- Duncan, L. W. 1999. Nematode diseases of citrus. in L. W. Timmer, and L. W. Duncan, eds. Citrus health management, Minnesota: APS Press, pp. 136–148. https://doi.org/10.1023/A:1008764300753.
- Duncan, L. W. 2005. Nematode parasites of citrus. in M. Luc, R. A. Sikora, and J. Bridge, eds. Plant Parasitic Nematodes in Subtropical and Tropical Agriculture, Wallingford: CABI Publishing, pp. 437–466. https://doi.org/10.1079/9780851997278.0437.
- Duncan, L. W., and Eissenstat, D. M. 1993. Responses of Tylenchulus semipenetrans to citrus fruit removal: implications for carbohydrate competition. Journal of Nematology 25:7–14.
- Duncan, L. W., and Phillips, M. S. 2009. Sampling root-knot nematodes. in R. N. Perry, M. Moens, and J. L. Starr, eds. Root-knot Nematodes, Wallingford: CABI Publishing, pp. 275–300. https://doi.org/10.1079/9781845934927.0000.
- Duncan, L. W., El-Morshedy, M. M., and McSorley, R. 1994a. Sampling citrus fibrous roots and Tylenchulus semipenetrans. Journal of Nematology 26:442–451.
- Duncan, L. W., Inserra, R. N., O’Bannon, J. H., and El-Morshedy, M. M. 1994b. Reproduction of a Florida population of Tylenchulus semipenetrans on resistant citrus rootstocks. Plant Disease 78:1067–1071.
- Duncan, L. W., Mashela, P., Ferguson, J., Graham, J., Abou-Setta, M. M., and El-Morshedy, M. M. 1995. Estimating crop loss in orchards with patches of mature citrus trees infected by Tylenchulus semipenetrans. Nematropica 25:43–51.
- Ebadi, H., Advali, B., Gholamian, E., Fatahi Moghadam, J., Golmohammadi, M., Moradi, B., and Mohammad Alian, Y. 2014. Citrus tree growing guide (planting, growing and harvesting). Karaj: Agricultural Research, Education and Extension Organization.
- Eisenback, J. D., and Hunt, D. J. 2021. Handling, fixing, staining and mounting nematodes. in R. N. Perry, D. J. Hunt, and S. A. Subbotin, eds. Techniques for work with plant and soil nematodes, Wallingford: CABI Publishing, pp. 71–87. https://doi.org/10.1079/9781786391759.0005.
- Fajardo, P. M., Aballay, E. E., and Casanova, P. M. 2011. Soil properties influencing phytoparasitic nematode population on Chilean vineyards. Chilean Journal of Agricultural Research 71:240–248. https://doi.org/10.4067/s0718-58392011000200009.
- Fars Agricultural Jihad Organization (2020). FAJO. (November 26, 2020). https://fajo.ir/site/index.php/manager
- Ferris, H. 1978. Nematode economic thresholds: derivation, requirements, and theoretical considerations. Journal of Nematology 10:341–350.
- Food and Agriculture Organization of the United Nations. 2026. FAOSTAT. (February 19, 2026). https://www.fao.org/faostat/en/#compare/Crops and livestock products.
- Garabedian, S., Van Gundy, S. D., Mankau, R., and Radewald, J. D. 1984. Nematodes. in J. E. Pehrson, D. L. Flaherty, N. V. O Connel, and P. A. Phillips, eds. Integrated Pest Management for Citrus, California: Richmond, Pp. 129–131.
- Goodell, P., and Ferris, H. 1981. Sample optimization for five plant-parasitic nematodes in an alfalfa field. Journal of Nematology 13:304–313.
- Gorres, J. H., Savin, M. C., Neher, D. A., Weicht, T. R., and Amador, J. A. 1999. Grazing in a porous environment: 1. The effect of soil pore structure on C and N mineralization. Plant and Soil 212:75–83. https://doi.org/10.1023/A:1004694202862.
- Inserra, R. N., Duncan, L. W., O’Bannon, J. H., and Fuller, S. A. 1994. Citrus nematode biotypes and resistant citrus rootstocks in Florida. Nematology Circular 205:1–4.
- Inserra, R. N., Stanley, J. D., O’Bannon, J. H., and Esser, R. P. 2005. Nematode quarantine and certification programmes implemented in Florida. Nematologia Mediterranea 33:113–123.
- Inserra, R. N., Vovlas, N., and O’Bannon, J. H. 1980. A classification of Tylenchulus semipenetrans biotypes. Journal of Nematology 12:283–287.
- Inserra, R. N., Vovlas, N., O’Bannon, J. H., and Esser, R. P. 1988. Tylenchulus graminis n. sp. and T. palustris n. sp. (Tylenchulidae) from native flora of Florida, with notes on T. semipenetrans and T. furcus. Journal of Nematology 20:266–287
- Izadpanah, K., and Safarian, A. 1968. Possible role of citrus nematode (Tylenchulus semipenetrans Cobb) in the citrus decline in southern Iran, in: Proceeding of the First National Congress of Plant Protection of Iran. Tehran: Iranian Research Institute of Plant Protection.
- Joshi, C., De Leeuw, J., and Van Duren, I. C. 2004. Remote sensing and GIS applications for mapping and spatial modelling of invasive species, in: Proceedings of the 20th ISPRS Congress: Geo-Imagery Bridging Continents. Istanbul: International Society for Photogrammetry and Remote Sensing.
- Kabata-Pendias, A. 2000. Trace Elements in Soils and Plants. Boca Raton: CRC Press. http://dx.doi.org/10.1201/9781420039900.
- Katcho, Z. A., and Allow, J. M. 1969. Citrus root nematode in Iran. Plant Disease Reporter 53:84.
- Labuschagne, N., and Kotze, J. M. 1988. Factors affecting feeder root rot of citrus caused by Fusarium solani, in: Citriculture: Proceedings of the Sixth International Citrus Congress. Rehovot: International Society of Citriculture, Balaban Publishers.
- Lamberti, F., Vovlas, N., and Tirro, A. 1976. Infettivita a patogenicita di tre popolazioni italiane di Tylenchulus semipenetrans su agrumi ed altri ospiti. Nematologia Mediterranea 4:85–91.
- Le Roux, H. F. 1995. Control of the citrus nematode in South Africa. Ph.D. dissertation, Pretoria University, South Africa.
- Li, J., and Heap, A. D. 2014. Spatial interpolation methods applied in the environmental sciences: A review. Environmental Modelling & Software 53:173–189. https://doi.org/10.1016/j.envsoft.2013.12.008.
- Mashela, P. W., and Nthangeni, M. E. 2002. Osmolyte allocation in response to Tylenchulus semipenetrans infection, stem girdling, and root pruning in citrus. Journal of Nematology 34:273–277.
- Mashela, P., Duncan, L. W., and McSorley, R. 1992b. Salinity reduces resistance to Tylenchulus semipenetrans in citrus rootstocks. Nematropica 22:7–12.
- Mashela, P., Duncan, L. W., Graham, J. H., and McSorley, R. 1992a. Leaching soluble salts increases population densities of Tylenchulus semipenetrans. Journal of Nematology 24:103–109.
- McSorley, R., Parrado, J. L., and Dankers, W. H. 1984. A quantitative comparison of some methods for the extraction of nematodes from roots. Nematropica 14:72–84.
- Minassian, V., and Moadab, H. 1970. The occurrence and distribution of citrus nematode Tylenchulus semipenetrans Cobb in Khuzestan, Iranian Journal of Plant Pathology 6:25–28. (In Persian with English summary).
- Niu, X., Wang, P., Xie, Z., Gao, M., Qian, S., Saifutdinov, R., Aspe, N. M., Wu, D., and Guan, P. 2024. Soil nematode metacommunities in different land covers: Assessment at the local and regional scales. Ecology and Evolution 14:e11468. https://doi.org/10.1002/ece3.11468.
- O’Bannon, H., and Ford, H. W. 1977. Resistance in citrus rootstocks to Radopholus similis and Tylenchulus semipenetrans (Nematoda), in: Proceedings of Third International Citrus Congress. Rehovot: International Society of Citriculture, Balaban Publishers. https://doi.org/10.5555/19790372681.
- Perry, R. N., and Moens, M. 2013. Plant Nematology. Wallingford: CABI Publishing.
- Philis, J. 1989. Yield loss assessment caused by the citrus nematode Tylenchulus semipenetrans on Valencia oranges in Cyprus. Nematologia Mediterranea 17:5–6.
- Rahimi, J., Ebrahimpour, M., and Khalili, A. 2013. Spatial changes of extended De Martonne climatic zones affected by climate change in Iran. Theoretical and Applied Climatology 112:3–4. [Persian]. https://doi.org/10.1007/s00704-012-0741-8.
- Rashidifard, M., Shokoohi, E., Hoseinipour, A., and Jamali, S. 2015. Distribution, morphology, seasonal dynamics, and molecular characterization of Tylenchulus semipenetrans from citrus orchards in southern Iran. Biologia 70:771–781. https://doi.org/10.1515/biolog-2015-0098.
- Rumiani, M., Hamhehzarghani, H., Karegar, A., and Ghaderi, R. 2021. Optimization of citrus tree sampling pattern for estimating population of citrus nematode in the soil of infested orchards in Fars province, southern Iran. Crop Protection 142:105523. https://doi.org/10.1016/j.cropro.2020.105523.
- Rumiani, M., Zouhar, M., Karegar, A., Hamzehzarghani, H., Tahmasebi, A., and Rashidifard, M. 2024. Morphological characterization and assessment of genetic variability of Tylenchulus semipenetrans populations from southern Iran. Journal of Nematology 56:1. https://doi.org/10.2478/jofnem-2024-0047.
- Rumiani, M., Karegar, A., and Hamzehzarghani, H. 2025. Population dynamics of the citrus nematode Tylenchulus semipenetrans in an infested orchard in Fars province, southern Iran. Iranian Journal of Plant Pathology 60:48–59. https://doi.org/10.22034/ijpp.2025.2021825.468.
- Salahi Ardakani, A., Tanha Maafi, Z., Mokaram Hesar, A., and Mohammadi, G. E. 2014. Relationship between soil properties and abundance of Tylenchulus semipenetrans in citrus orchards, Kohgilouyeh va Boyerahmad province. Journal of Agricultural Science and Technology 16:1699–1710.
- Seif-Ennasr, M., Bouchaou, L., El Morjani, Z. E., Hirich, A., Beraaouz, E., and Choukr-Allah, R. 2020. GIS-based land suitability and crop vulnerability assessment under climate change in Chtouka Ait Baha, Morocco. Atmosphere 11:1167. https://doi.org/10.3390/atmos11111167.
- Sharafeh, M. 1972. A preliminary study on population dynamics of the citrus nematode, Tylenchulus semipenetrans Cobb, in Khafr an important citrus growing region of Fars. Entomologie et Phytopathologie Appliquées 33:9–14.
- Sharma, G. C., Thakur, B. S., and Kshyap, A. S. 2005. Impact of NPK on the nematode populations and yield of plum (Prunus salicina). Acta Horticulturae 696:433–436. https://doi.org/10.17660/actahortic.2005.696.77.
- Shepard, D. 1968. A two-dimensional interpolation function for irregularly-spaced data, in: Proceedings of the 1968 ACM National Conference. New York: ACM press. https://doi.org/10.1145/800186.810616.
- Sikora, R. A., Coyne, D., Hallmann, J., and Timper, P. 2018. Plant Parasitic Nematodes in Subtropical and Tropical Agriculture, 3rd Edition. Wallingford: CABI.
- Sorribas, F. J., Verdejo-Lucas, S., Pastor, J., Ornat, C., Pons, J., and Valero, J. 2008. Population densities of Tylenchulus semipenetrans related to physicochemical properties of soil and yield of clementine mandarin in Spain. Plant Disease 92:445–450. https://doi.org/10.1094/pdis-92-3-0445.
- Tarjan, A. C. 1956. The possibility of mechanical transmission of nematodes in citrus groves. Proceedings of the Florida State Horticultural Society 69:34–37.
- Tanha Maafi, Z., and Damadzadeh, M. 2008. Incidence and control of citrus nematode Tylenchulus semipenetrans Cobb in north of Iran. Nematology 10:113–122. https://doi.org/10.1163/156854108783360096.
- Tanha Maafi, Z. T., Amani, M., Stanley, J. D., Inserra, R. N., Van den Berg, E., and Subbotin, S. A. 2012. Description of Tylenchulus musicola sp. n. (Nematoda: Tylenchulidae) from banana in Iran with molecular phylogeny and characterisation of species of Tylenchulus Cobb, 1913. Nematology 14:353–369. https://doi.org/10.1163/156854111x596242.
- Tanha Maafi, Z. T., and Kheiri, A. 1991. Citrus nematode (Tylenchulus semipenetrans) in Hormozgan province. Iranian Journal of Plant Pathology 27:31–42 (in Persian with English Summary).
- Timmer, L. W., Garnsey, S. S. M., and Graham, J. H. 2000. Compendium of citrus diseases. Minnesota: APS Press. https://doi.org/10.1094/9780890545850.
- United States Department of Agriculture, 2012. USDA. Citrus: world markets and trade. http://www.fas.usda.gov/psdonline/circulars/citrus.
- Van Gundy, S. D., and Martin, J. P. 1962. Soil texture, pH and moisture effects on the development of citrus nematode (Tylenchulus semipenetrans). Phytopathology 52:31.
- Van Gundy, S. D., Martin, J. P., and Tsao, P. H. 1964. Some soil factors influencing reproduction of the citrus nematode and growth reduction of sweet orange seedlings. Phytopathology 54:294–299.
- Whitehead, A. G., and Hemming, J. R. 1965. A comparison of some quantitative methods of extracting small vermiform nematodes from soil. Annals of Applied Biology 55:25–38. https://doi.org/10.1111/j.1744-7348.1965.tb07864.x.
- Zheng, S. H., Gao, Q., Luo, G. T., Ji, L., Li, X. Y., Yu, H. M., Zhao, X. C., and Zhu, S. P. 2024. Seasonal changes and spatial distribution of citrus fine roots in different rootstocks. Scientia Horticulturae 334:113307. https://doi.org/10.1016/j.scienta.2024.113307.
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Submitted on: Dec 20, 2025
Accepted on: Aug 3, 2026
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