A New Soilborne Pathogen: Phytopythium vexans





Phytopythium spp., Phytopythium vexans, Oomycetes, Pathogens , Soilborne


The genus Phytopythium is a group of soil-borne pathogens that were previously included under the genus Pythium, separated from the genus Pythium with the continuation of taxonomic studies, and today, different characteristics have been revealed compared to the genus Pythium and have only recently begun to be understood. The soil-borne organisms in the genus Phytopythium are closely related to Phytophthora and Pythium species and have similar morphological structure and biology. There are approximately 20 species in the genus Phytopythium and most species survive as saprophytic on host plants. Pathogenic species, on the other hand, are very dangerous and potentially threatening for host plants. Among these species, Phytopythium vexans draws attention. When the studies are analysed, it is seen that Pp. vexans causes serious damages on woody plants and ornamental plants as well as cultivated plants. The aim of this study is to introduce the general characteristics of the genus Phytopythium, to reveal the similarities and differences between the genus Phytophthora and Pythium, and to give detailed information about Pp. vexans, which is a pathogenic species in plants and has been found to be pathogenic in various plants in Turkey in recent years and its importance has been emphasised. In this review, in addition to general information about the genus Phytopythium, morphological characteristics of Pp. vexans, disease symptoms on host plants, methods used in its identification, studies carried out in the world and in Turkey and strategies for its control will be given. Thus, the potential threat posed by this soil-borne pathogen group in agricultural production will be discussed.


Aday Kaya, A.G., Gültekin, H. C., & Karakaya, A. (2019). Marmara Bölgesindeki orman fidanlıklarında yetiştirilen odunsu bitkilerdeki fungus ve su küflerinin tespiti. Turkish Journal of Forestry, 20(4), 324-332. https://doi.org/10.18182/tjf.588976

Bala, K., Robideau, G.P., Désaulniers, N., De Cock, A.W.A.M., Lévesque, C.A. (2010). Taxonomy, DNA barcoding and phylogeny of three new species of Pythium from Canada. Persoonia: Molecular Phylogeny and Evolution of Fungi, 25, 22. https://doi.org/10.3767/003158510X524754

Baptista, F. R., Pires-Zottarelli, C. L. A., Rocha, M., & Milanez, A. I. (2004). The genus Pythium Pringsheim from Brazilian cerrado areas, in the state of São Paulo. Brazil. Rev. Bras. Botânica. 27:281-290. https://doi.org/10.1590/S0100-84042004000200008

Baten, M. A., Asano, T., Motohashi, K., Ishiguro, Y., Rahman, M. Z., Inaba, S., ... & Kageyama, K. (2014). Phylogenetic relationships among Phytopythium species, and re-evaluation of Phytopythium fagopyri comb. nov., recovered from damped-off buckwheat seedlings in Japan. Mycological progress, 13, 1145-1156. https://doi.org/10.1007/s11557-014-1003-1

Baysal-Gurel, F., & Kabir, M. N. (2019). Evaluation of fungicides and biocontrol products for the control of Phytophthora root rot of hydrangeas. Archives of Phytopathology and Plant Protection, 52(5-6), 481-496. https://doi.org/10.1080/03235408.2019.1648023

Baysal-Gurel, F., Liyanapathiranage, P., Panth, M., Avin, F. A., & Simmons, T. (2021). First report of Phytopythium vexans causing root and crown rot on flowering cherry in Tennessee. Plant Disease, 105(1), 232. https://doi.org/10.1094/PDIS-06-20-1166-PDN

Beluzán, F., Miarnau, X., Torguet, L., Armengol, J., and Abad-Campos, P. (2022). Survey of oomycetes associated with root and crown rot of almond in Spain and pathogenicity of Phytophthora niederhauserii and Phytopythium vexans to ‘Garnem’ rootstock. Agriculture 12:294. https://doi.org/10.3390/agriculture12020294

Benfradj, N., Migliorini, D., Luchi, N., Santini, A., & Boughalleb-M’Hamdi, N. (2017). Occurrence of Pythium and Phytopythium species isolated from citrus trees infected with gummosis disease in Tunisia. Archives of Phytopathology and Plant Protection, 50(5-6), 286-302. https://doi.org/10.1080/03235408.2017.1305479

Bennett, R. M., Nam, B., Dedeles, G. R., & Thines, M. (2017). Phytopythium leanoi sp. nov. and Phytopythium dogmae sp. nov., Phytopythium species associated with mangrove leaf litter from the Philippines. Acta Mycologica, 52(2). https://doi.org/10.5586/am.1103

Boari, A., Cunha, E. M., Quadros, A. F. F., Barreto, R. W., & Fernandes, A. F. (2018). First report of Phytopythium sp. causing storage root rot and foliage blight of cassava in Brazil. Plant Disease, 102(5), 1042-1042. https://doi.org/10.1094/PDIS-09-17-1449-PDN

Broders, K.D., Lipps, P.E., Ellis, M., Dorrance, A.E. (2009). Pythium delawarii – a new species isolated from soybean in Ohio. Mycologia, 101, 232–238. https://doi.org/10.3852/08-133

Browne, G. T., Ott, N. J., and Fichtner, E. (2019). First Report of Phytopythium helicoides causing root rot on peach rootstock in California. Plant Dis. 103:2968. https://doi.org/10.1094/PDIS-09-18-1697-PDN

CABI Crop Production Compendium (2020). Pythium vexans. https://www.cabi.org/cpc/datasheet/ 46174. Erişim tarihi: 27.09.2023

Chang, T. T. (1993). Investigation and pathogenicity tests of Pythium species from rhizosphere of Cinnamomum osmophloeum. Plant Pathol. Bull. 2:66-70. https://www.cabdirect.org/cabdirect/abstract/19942306681

Chen, X.-R., Liu, B.-B., Xing, Y.-P., Cheng, B.-P., Liu, M.-L., Tong, Y.-H., & Xu, J.-Y. (2016). Identification and characterization of Phytopythium helicoides causing stem rot of Shatangju mandarin seedlings in China. Eur. J. Plant Pathol. 146:715-727. https://doi.org/10.1007/s10658-016-0952-4

Choi, Y.-J., Beakes, G., Glockling, S., Kruse, J., Nam, B., Nigrelli, L., Ploch, S., Shin, H.-D., Shivas, R. G., Telle, S., Voglmayr, H., & Thines, M. (2015). Towards a universal barcode of oomycetes - a comparison of the cox1 and cox2 loci. Mol. Ecol. Resour. 15:1275-1288. https://doi.org/10.1111/1755-0998.12398

Choudhary, C. E., Burgos-Garay, M. L., Moorman, G. W., & Hong, C. (2016). Pythium and Phytopythium species in two Pennsylvania greenhouse irrigation water tanks. Plant Dis. 100:926-932. https://doi.org/10.1094/PDIS-07-15-0836-RE

Cooke, D.E.L., Drenth, A., Duncan, J.M., Wagels, G., Brasier, C.M. (2000). A molecular phylogeny of Phytophthora and related oomycetes. Fungal Genetics and Biology, 30 (1), 17–32. https://doi.org/10.1006/fgbi.2000.1202

Davidson, J. M., Rehner, S. A., Santana, M., Lasso, E., Urena de Chapet, O., & Herre, E. A. (2000). First report of Phytophthora heveae and Pythium spp. on tropical tree seedlings in Panama. Plant Dis. 84:706. https://doi.org/10.1094/PDIS.2000.84.6.706C

De Cock, A. W. A. M., Lodhi, A. M., Rintoul, T. L., Bala, K., Robideau, G. P., Abad, Z. G., ... & Lévesque, C. A. (2015). Phytopythium: molecular phylogeny and systematics. Persoonia-Molecular phylogeny and evolution of fungi, 34(1), 25-39. https://doi.org/10.3767/003158515X685382

Dervis, S., Soylu, S., Serce, C. (2014). Corm and root rot of Colocasia esculenta caused by Ovatisporangium vesans and Rhizoctonia solani. Romanian Biotechnological Letters 19(6):9868– 9874.

Derviş, S., Türkölmez, Ş., Çiftçi, O., Özer, G., Ulubaş Serçe, Ç., & Dikilitas, M. (2020). Phytopythium litorale: A novel killer pathogen of plane (Platanus orientalis) causing canker stain and root and collar rot. Plant disease, 104(10), 2642-2648. https://doi.org/10.1094/PDIS-01-20-0141-RE

Donati, I., Cellini, A., Sangiorgio, D., Caldera, E., Sorrenti, G., & Spinelli, F. (2020). Pathogens associated to kiwifruit vine decline in Italy. Agriculture. 10:119. https://doi.org/10.3390/agriculture10040119

Duncan, J. & Cooke, D. (2002). Identifying, diagnosing and detecting Phytophthora by moleculer methods. Mycologist 16:59- 66. https://doi.org/10.1017/S0269-915X(02)00205-7

Endes, A. & Kayım, M. (2016). Çukurova Bölgesi’nde Kayısı Ağaçlarında Solgunluk ve Gövde Çürüklüğü Etmeni Phytopythium vexans’ ın Tanılanması. Çukurova Tarım ve Gıda Bilimleri Dergisi, 31(2), 59-68.

Fichtner, E.J., Browne, G.T., Mortaz, M., Ferguson, L., Blomquist, C.L. (2016). First report of root rot caused by Phytopythium helicoides on Pistachio Rootstock in California. Plant Disease, 100 (11), 2337. https://doi.org/10.1094/PDIS-12-15-1424-PDN

Foster, Z. S. L., Albornoz, F. E., Fieland, V. J., Larsen, M. M., Jones, F. A., Tyler, B. M., Nguyen, H. D. T., Burgess, T. I., Riddell, C., Voglmayr, H., Martin, F. N., & Grünwald, N. J. (2022). A new oomycete metabarcoding method using the rps10 gene. Phytobiomes J. 6:214-226. https://doi.org/10.1094/PBIOMES-02-22-0009-R

Gonçalves, D. R., de Jesus, A. L., & Pires-Zottarelli, C. L. A. (2016). Pythium and Phytopythium species associated with hydroponically grown crops around the City of São Paulo. Brazil. Trop. Plant Pathol. 41:397-405. https://doi.org/10.1007/s40858-016-0116-2

Guo, L. Y., & Ko, W. H. (1996). Nature of enhanced severity of Anthurium root rot by diuron treatment for weed control. J. Phytopathol. 144:7-11. https://doi.org/10.1111/j.1439-0434.1996.tb01480.x

Hendrix,F. F. & Campbell, W. A. (1973). Phytopythiums as plant pathogens. Annual Review of Phytopathology 11: 77–98. https://doi.org/10.1146/annurev.py.11.090173.000453

Hernández, P. A., Chávez, E. C., Ortiz, J. D., Beache, M. B., Vargas, L. T., &Fuentes, Y. O. (2019). First report of Phytopythium vexans causing the “avocado sadness” in Michoacan, Mexico. Phyton (B. Aires) 88: 11-13. https://doi.org/10.32604/phyton.2019.04608

Hon-Hing, H. O., Xiu-Xian, C., Hui-Cai, Z., & Zheng, F.-C. (2012). The occurrence and distribution of Pythium species on Hainan Island of South China. Bot. Stud. 53:524-534. http://ejournal.sinica.edu.tw/bbas/content/2012/4/Bot534-11.pdf

Ibanez, J. M., Favaro, M. A., Obregon, V. G., & Lattar, T. E. (2022). Oomycetes associated with strawberry diseases in Corrientes, Argentina. Crop Prot. 157:105967. https://doi.org/10.1016/j.cropro.2022.105967

Ivors, K. L., Abad, Z. G., & Benson, D. M. (2008). Evaluating the pathogenicity of Pythium vexans isolates from Fraser fir in North Carolina. Plant Health Progress, 9(1), 8. https://doi.org/10.1094/PHP-2008-1006-01-RS

Jabiri, S., Lahlali, R., Bahra, C., Bendriss Amraoui, M., Tahiri, A., & Amiri, S. (2020). First report of Phytopythium vexans associated with dieback disease of apple trees in Morocco. J. Plant Pathol. 102:1319. https://doi.org/10.1007/s42161-020-00606-2

Javadi, N., & Sharifnabi, B. (2016). Phytopythium litorale, the causal agent of almond root and crown rot in Iran. In Proceedings of 22nd Iranian plant protection congress (pp. 27-30). Karaj, Iran: College of Agriculture and Natural Resources.

Jeffers, S. N., Schnabel, G., & Smith, J. P. (2004). First report of resistance to mefenoxam in Phytophthora cactorum in the United States and elsewhere. Plant Disease, 88(5), 576-576. https://doi.org/10.1094/PDIS.2004.88.5.576A

Kaosiri, T., & Siddhipongse, S. (1985). Association of Phytophthora cinnamomi and Pythium vexans with stem canker disease of cotton [Gossypium hirsutum var. Srisam-rong 3]. Warasan Wichakan Kaset 3:26-32.

Karaca, G., Jonathan, R., Paul, B. (2009). Pythium stipitatum sp. nov. isolated from soil and plant debris taken in France, Tunisia, Turkey, and India. FEMS Microbiology Letters, 295, 164–169. https://doi.org/10.1111/j.1574-6968.2009.01579.x

Lan, C., Lin, X., Dai, Y., Lin, G., Liu, X., & Yang, X. (2023). First report of sanqi (Panax notoginseng) root rot caused by Pythium vexans in China. Plant Dis. 107:235 https://doi.org/10.1094/PDIS-04-22-0781-PDN

Lévesque, C.A., de Cock, W.A.M. (2004). Molecular phylogeny and taxonomy of the genus Pythium. Mycological Research, 108, 1363–1383. https://doi.org/10.1017/S0953756204001431

Linde, C., Kemp, G. H. J., & Wingfleld, M. J. (1994). Pythium and Phytophthora species associated with eucalypts and pines in South Africa. Eur. J. For. Pathol. 24:345-356. https://doi.org/10.1111/j.1439-0329.1994.tb00828.x

Lu, X. H., Michael Davis, R., Livingston, S., Nunez, J., & Hao, J. J. (2012). Fungicide sensitivity of Pythium spp. associated with cavity spot of carrot in California and Michigan. Plant disease, 96(3), 384-388. https://doi.org/10.1094/PDIS-07-11-0562

Marano, A. V., Jesus, A. L., De Souza, J. I., Leãno, E. M., James, T. Y., Jerônimo, G. H., ... & Pires-Zottarelli, C. L. A. (2014). A new combination in Phytopythium: P. kandeliae (Oomycetes, Straminipila). Mycosphere, 5(4), 510-522. https://doi.org/10.5943/mycosphere/5/4/3

Martin, F. N. (2000). Phylogenetic relationships among some Pythium species inferred from sequence analysis of the mitochondrially encoded cytochrome oxidase II gene. Mycologia, 92(4), 711-727. https://doi.org/10.1080/00275514.2000.12061211

Matthiesen, R. L., Ahmad, A. A., & Robertson, A. E. (2016). Temperature affects aggressiveness and fungicide sensitivity of four Pythium spp. that cause soybean and corn damping off in Iowa. Plant disease, 100(3), 583-591. https://doi.org/10.1094/PDIS-04-15-0487-RE

Mazzola, M., Andrews, P. K., Reganold, J. P., Lévesque, C. A. (2002). Frequency, virulence, and metalaxyl sensitivity of Phytopythium spp. isolated from apple roots under conventional and organic production systems. Plant Disease 86:669-675. https://doi.org/10.1094/PDIS.2002.86.6.669

Meyer, M. D., & Hausbeck, M. K. (2013). Using soil-applied fungicides to manage Phytophthora crown and root rot on summer squash. Plant disease, 97(1), 107-112. https://doi.org/10.1094/PDIS-12-11-1071-RE

Miyake, N., Nagai, H., & Kageyama, K. (2014). Wilt and root rot of poinsettia caused by three high-temperature-tolerant Pythium species in ebb-and-flow irrigation systems. J. Gen. Plant Pathol. 80:479-489. https://doi.org/10.1007/s10327-014-0542-2

Moein, S. (2016). Quantification of apple replant pathogens from roots, and their occurrence in irrigation water and nursery trees (Doctoral dissertation, Stellenbosch: Stellenbosch University). http://hdl.handle.net/10019.1/98329

Mostoufizadeh, G. R., & Banihashemi, Z. A. D. (2005). Identification of soil Pythium species in Fars province of Iran. Iran. J. Sci. Technol. Trans. A 29:79-87. https://doi.org/10.22099/IJSTS.2005.2786

Nakova, M. (2010). Monitoring of Phytophthora species on fruit trees in Bulgaria. European Journal of Plant Pathology 128:517-525. https://doi.org/10.1007/s10658-010-9686-x

Nam, B., Choi, Y.J. (2019). Phytopythium and Pythium species (Oomycota) isolated from freshwater environments of Korea. Mycobiology, 47 (3), 261–272. https://doi.org/10.1080/12298093.2019.1625174

Noireung, P., Intaparn, P., Maumoon, R., Wongwan, T.,& To–anun, C. (2020). First record of Phytopythium vexans causing root rot on mandarin (Citrus reticulate L. cv. Sainampueng) in Thailand. Plant Pathol. Quar. 10:85-90. https://doi.org/10.5943/ppq/10/1/10

Nyoni, M., Lötze, E., Mazzola, M., Wessels, J. P. B., & McLeod, A. (2019). Evaluating different approaches in the application of phosphonates for the control of apple root diseases. Australasian Plant Pathology, 48, 461-472. https://doi.org/10.1007/s13313-019-00647-x

Nzungize, J., Geps, P., Buruchara, R., Buah, S., Ragama, P., Busogoro, J. P., & Baudin, J. P. (2011). Pathogenic and molecular characterization of Pythium species inducing root rot symptoms of common bean in Rwanda. African J. Microbiol. Res. 5:1169-1181. https://doi.org/10.5897/AJMR10.747

O’Donnell, K. (1993). The fungal holomorph: Mitotic, meiotic and pleomorphic speciation in fungal systematics. Pages 225-233 in: Fusarium and Its Near Relatives. D. R. Reynolds and J. W. Taylor, eds. CAB International Wallingford, U.K.

Ogle, H. J., Stirling, A. M., & Dart, P. J. (1993). Pathogenicity of fungi associated with seedling disease of cotton. Aust. J. Exp. Agric. 33:923-929. https://doi.org/10.1071/EA9930923

Oszako, T., Sikora, K., Belbahri, L., & Nowakowska, J. A. (2016). Molecular detection of oomycetes species in water courses. Folia For. Pol. 58:246-251. https://doi.org/10.1515/ffp-2016-0028

Park, M.-J., Back, C.-G., & Park, J.-H. (2019). Occurrence of Phytopythium vexans causing stem rot on Anthurium andraeanum in Korea. Korean J. Mycol. 47:443-446. https://doi.org/10.4489/KJM.20190049

Parke, J. L., Redekar, N. R., Eberhart, J. L., & Funahashi, F. (2019). Hazard analysis for Phytophthora species in container nurseries: Three case studies. HortTechnology 29:745-755. https://doi.org/10.21273/HORTTECH04304-19

Polat, Z., Awan, Q.N., Hussain, M., Akgül, D.S. (2017). First report of Phytopythium vexans causing root and collar rot of kiwifruit in Turkey. Plant Disease, 101 (6), 1058. https://doi.org/10.1094/PDIS-11-16-1554-PDN

Prencipe, S., Savian, F., Nari, L., Ermacora, P., Spadaro, D., & Martini, M. (2020). First report of Phytopythium vexans causing decline syndrome of Actinidia deliciosa ‘Hayward’ in Italy. Plant Dis. 104:2032. https://doi.org/10.1094/PDIS-10-19-2101-PDN

Pringsheim, N. (1858): Beitrag für Morphologie und Systematik der Algen. Die Saprolegnieen. Jahrbücher für Wissenschaftliche Botanik 1: 284-306.

Radmer, L., Anderson, G., Malvick, D. M., Kurle, J. E., Rendahl, A., & Mallik, A. (2017). Pythium, Phytophthora, and Phytopythium spp. associated with soybean in Minnesota, their relative aggressiveness on soybean and corn, and their sensitivity to seed treatment fungicides. Plant disease, 101(1), 62-72. https://doi.org/10.1094/PDIS-02-16-0196-RE

Rai, M., Abd-Elsalam, K.A., Ingle, A.P. (2020). Pythium: diagnosis, diseases and management. CRC Press. https://doi.org/10.1201/9780429296406

Redekar, N.R., Eberhart, J.L., Parke, J.L. (2019). Diversity of Phytophthora, Pythium, and Phytopythium species in recycled irrigation water in a container nursery. Phytobiomes Journal, 3 (1), 31–45. https://doi.org/10.1094/PBIOMES-10-18-0043-R

Robideau, G. P., De Cock, A. W., Coffey, M. D., Voglmayr, H., Brouwer, H., Bala, K., ... & André Lévesque, C. (2011). DNA barcoding of oomycetes with cytochrome c oxidase subunit I and internal transcribed spacer. Molecular ecology resources, 11(6), 1002-1011. https://doi.org/10.1111/j.1755-0998.2011.03041.x

Rodriguez-Padron, C., Siverio, F., Perez-Sierra, A., Rodríguez, A. (2018). Isolation and pathogenicity of Phytophthora species and Phytopythium vexans recovered from avocado orchards in the Canary Islands, including Phytophthora niederhauserii as a new pathogen of avocado. Phytopathologia Mediterranea, 57(1), 89–106. https://doi.org/10.14601/Phytopathol_Mediterr-22022

Santika, I. A., Widiastuti, A., and Wibowo, A. (2021). First Report of Phytopythium vexans (de Barry) Abad, de Cock, Bala, Robideau, Lodhi & Lévesque causing potato tuber rot in Indonesia. J. Perlindungan Tanam. Indones. 25:173-181. https://doi.org/10.22146/jpti.67556

Senda, M., Suga, H., Levésque, G.A. (2009). Two new species of Pythium, P. senticosum and P. takayamanum, isolated from cool-temperate forest soil in Japan. Mycologia, 101, 439–448. https://doi.org/10.3852/08-104

Shrestha, S. K., Zhou, Y., and Lamour, K. (2013). Oomycetes baited from streams in Tennessee 2010–2012. Mycologia 105:1516-1523. https://doi.org/10.3852/13-010

Souli, M., Boughalleb, N., Campo, P. A., Alvarez, L. A., Sierr, A. P., Armengol, J., Jime´nez, J. G. (2011). First Report of Phytopythium indigoferae and P. irregulare Associated to Apple Trees Decline in Tunisia. J. Phytopathology 159:352–357. https://doi.org/10.1111/j.1439-0434.2010.01772.x

Spies, C. F. J., Mazzola, M., McLeod, A. (2011). Characterisation and detection of Phytopythium and Phytophthora species associated with grapevines in South Africa. Eur. J. Plant Pathology 131:103– 119. https://doi.org/10.1007/s10658-011-9791-5

Tao, Y., Zeng, F., Ho, H., Wei, J., Wu, Y., Yang, L., & He, Y. (2011). Pythium vexans causing stem rot of Dendrobium in Yunnan province. China. J. Phytopathol. 159:255-259. https://doi.org/10.1111/j.1439-0434.2010.01756.x

Tewoldemedhin, Y. T., Mazzola, M., Botha, W. J., Spies, C. J., McLeod, A. (2011). Characterization of fungi (Fusarium and Rhizoctonia) and oomycetes (Phytophthora and Phytopythium) associated with apple orchards in South Africa. Eur. J. Plant Pathology 130:215– 229. https://doi.org/10.1007/s10658-011-9747-9

Thao, L., Hien, L., Liem, N., Thanh, H., Khanh, T., Binh, V., Trang, T., Anh, P., & Tu, T. (2020). First report of Phytopythium vexans causing root rot disease on durian in Vietnam. New Dis. Rep. 41:2. https://doi.org/10.5197/j.2044-0588.2020.041.002

Thomas, J. (2000). Biological control of rot diseases of small cardamom. Pages 223-237 in: Biocontrol Potential and Its Exploitation in Sustainable Agriculture. R. K. Upadhyay, K. G. Mukerji, and B. P. Chamola, eds. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4209-4_16

Tkaczyk, M. (2020). Phytopythium: Origin, differences and meaning in modern plant pathology. Folia For. Pol. 62:227-232. https://doi.org/10.2478/ffp-2020-0022

Türkkan, M., Özer, G., Karaca, G., Erper, İ. & Derviş, S. (2022). Characterization and pathogenicity of Pythium-like species associated with root and collar rot of kiwifruit in Turkey. Plant Disease, 106(3), 854-863. https://doi.org/10.1094/PDIS-05-21-0961-RE

Uzuhashi, S., Tojo, M., Kakishima, M. (2010). Phylogeny of the genus Pythium and description of new genera. Mycoscience, 51, 337–365. https://doi.org/10.1007/S10267-010-0046-7

Van der Plaats-Niterink, A.J. (1981). Monograph of the genus Pythium Vol. 21. Centraalbureau voor Schimmelcultures, Baarn. https://doi.org/10.1016/S0007-1536(82)80143-5

Vawdrey, L. L., Langdon, P., & Martin, T. (2005). Incidence and pathogenicity of Phytophthora palmivora and Pythium vexans associated with durian decline in far northern Queensland. Australas. Plant Pathol. 34:127-128. https://doi.org/10.1071/AP04093

Villa, N.O., Kageyama, K., Asano, T., Suga, H. (2006). Phylogenetic relationships of Pythium and Phytophthora species based on ITS rDNA, cytochrome oxidase II and β-tubulin gene sequences. Mycologia, 98 (3), 410–422. https://doi.org/10.3852/mycologia.98.3.410

Wang, K. X., Xie, Y. L., Yuan, G. Q., Li, Q. Q., & Lin, W. (2015). First report of root and collar rot caused by Phytopythium helicoides on kiwifruit (Actinidia chinensis). Plant Dis. 99:725. https://doi.org/10.1094/PDIS-08-14-0817-PDN

Weiland, J. E., Santamaria, L., & Grünwald, N. J. (2014). Sensitivity of Pythium irregulare, P. sylvaticum, and P. ultimum from forest nurseries to mefenoxam and fosetyl-Al, and control of Pythium damping-off. Plant disease, 98(7), 937-942. https://doi.org/10.1094/PDIS-09-13-0998-RE

Yamaji, K., Fukushi, Y., Hashidoko, Y., &Tahara, S. (2005). Penicillium frequentans isolated from Picea glehnii seedling roots as a possible biological control agent against damping-off. Ecol. Res. 20:103-107. https://doi.org/10.1007/s11284-004-0004-y

Yamaji, K., Fukushi, Y., Hashidoko, Y., Yoshida, T., &Tahara, S. (2001). Penicillium fungi from Picea glehnii seeds protect the seedlings from damping-off. New Phytol. 152:521-531 https://doi.org/10.1046/j.0028-646X.2001.00280.x

Yang, J., Ruegger, P. M., McKenry, M. V., Becker, J. O., Borneman,J. (2012). Correlations between Root-Associated Microorganisms and Peach Replant Disease Symptoms in a California Soil. Plos One 7(10):1–10. https://doi.org/10.1371/journal.pone.0046420

Yang, X., Richardson, P. A., Olson, H. A., & Hong, C. X. (2013). Root and stem rot of begonia caused by Phytopythium helicoides in Virginia. Plant Dis. 97:1385. https://doi.org/10.1094/PDIS-05-13-0472-PDN

Yano, T., Shimizu, S., Miyoshi, T., Miyata, N., Immon, K., Shinozaki, T., Sawada, H., & Kageyama, K. (2010). Tolerant Actinidia species to Pythium helicoides and P. vexans causing root rot. Acta Hortic. 913:517-523. https://doi.org/10.17660/ActaHortic.2011.913.69

Yin, X., Li, X. Z., Yin, J. J., & Wu, X. (2016). First report of Phytopythium helicoides causing rhizome rot of Asian lotus in China. Plant Dis. 100:532. https://doi.org/10.1094/PDIS-07-15-0833-PDN

Yu, Y.-T., Chen, J., Gao, C.-S., Zeng, L.-B., Li, Z.-M., Zhu, T.-T., Sun, K., Cheng, Y., Sun, X. P., Yan, L., & Yan, Z. (2016). First report of brown root rot caused by Pythium vexans on ramie in Hunan, China. Can. J. Plant Pathol. 38:405-410. https://doi.org/10.1080/07060661.2016.1230150

Zeng, H. C., Ho, H. H., Zheng, F. C. (2005). Phytopythium vexans causing patch canker of rubber trees on Hainan Island, China. Mycopathologia 159: 601–606. https://doi.org/10.1007/s11046-005-5258-6

Zhou, Z., Yang, J., Jiao, B., Wu, C., & Dai, T. (2023). First report of crown and root rot caused by Phytopythium helicoides on Photinia × fraseri in China. Plant Dis. 107:235. https://doi.org/10.1094/PDIS-03-22-0672-PDN




How to Cite

Özkan Kahraman, Çigdem, & Yıldız, F. (2024). A New Soilborne Pathogen: Phytopythium vexans. Turkish Journal of Agriculture - Food Science and Technology, 12(5), 844–854. https://doi.org/10.24925/turjaf.v12i5.844-854.6666



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