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Soilborne Oospores of Phytophthora infestans in Central Mexico Survive Winter Fallow and Infect Potato Plants in the Field.
Plant Dis 2004; 88(1):29-33PD

Abstract

Survival and infectivity of oospores in soils naturally infested with P. infestans oospores were studied in central Mexico. Sporangia were selectively eliminated from soil samples to determine infectivity attributable to the presence of oospores. Selective elimination of sporangia was achieved by two cycles of wetting and drying the soil. Oospore concentration, viability, and infectivity varied among soils collected during the winter fallow in different locations of central Mexico. In some soils, oospores were infective regardless of the time at which they were collected during the winter fallow. However, oospore viability and infectivity decreased following 2 years of intercropping. The number of stem lesions and initial disease severity were significantly higher in soils with moderate (20 to 39 oospores g-1 soil) oospore infestation compared with soils with low (0 to 19 oospores g-1 soil) infestation. Our study confirms that oospores can survive winter fallow and serve as a source of primary inoculum in the central highlands of Mexico. Oospore survival appeared lower in the Toluca Valley soil, which may be an indication of soil suppressiveness.

Authors+Show Affiliations

Instituto de Investigaciones Agropecuarias y Forestales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico 58240.United States Department of Agriculture-Agricultural Research Service, Prosser, WA 99350.Campo Experimental Valle de Mexico, CIR-CENTRO INIFAP, Chapingo, Mexico 56230.Campo Experimental Valle de Mexico, CIR-CENTRO INIFAP, Chapingo, Mexico 56230.Department of Plant Pathology, Cornell University, Ithaca, NY 14853.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30812452

Citation

Fernández-Pavía, S P., et al. "Soilborne Oospores of Phytophthora Infestans in Central Mexico Survive Winter Fallow and Infect Potato Plants in the Field." Plant Disease, vol. 88, no. 1, 2004, pp. 29-33.
Fernández-Pavía SP, Grünwald NJ, Díaz-Valasis M, et al. Soilborne Oospores of Phytophthora infestans in Central Mexico Survive Winter Fallow and Infect Potato Plants in the Field. Plant Dis. 2004;88(1):29-33.
Fernández-Pavía, S. P., Grünwald, N. J., Díaz-Valasis, M., Cadena-Hinojosa, M., & Fry, W. E. (2004). Soilborne Oospores of Phytophthora infestans in Central Mexico Survive Winter Fallow and Infect Potato Plants in the Field. Plant Disease, 88(1), pp. 29-33. doi:10.1094/PDIS.2004.88.1.29.
Fernández-Pavía SP, et al. Soilborne Oospores of Phytophthora Infestans in Central Mexico Survive Winter Fallow and Infect Potato Plants in the Field. Plant Dis. 2004;88(1):29-33. PubMed PMID: 30812452.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Soilborne Oospores of Phytophthora infestans in Central Mexico Survive Winter Fallow and Infect Potato Plants in the Field. AU - Fernández-Pavía,S P, AU - Grünwald,N J, AU - Díaz-Valasis,M, AU - Cadena-Hinojosa,M, AU - Fry,W E, PY - 2019/3/1/entrez KW - bioassay KW - oomycete KW - potato late blight SP - 29 EP - 33 JF - Plant disease JO - Plant Dis. VL - 88 IS - 1 N2 - Survival and infectivity of oospores in soils naturally infested with P. infestans oospores were studied in central Mexico. Sporangia were selectively eliminated from soil samples to determine infectivity attributable to the presence of oospores. Selective elimination of sporangia was achieved by two cycles of wetting and drying the soil. Oospore concentration, viability, and infectivity varied among soils collected during the winter fallow in different locations of central Mexico. In some soils, oospores were infective regardless of the time at which they were collected during the winter fallow. However, oospore viability and infectivity decreased following 2 years of intercropping. The number of stem lesions and initial disease severity were significantly higher in soils with moderate (20 to 39 oospores g-1 soil) oospore infestation compared with soils with low (0 to 19 oospores g-1 soil) infestation. Our study confirms that oospores can survive winter fallow and serve as a source of primary inoculum in the central highlands of Mexico. Oospore survival appeared lower in the Toluca Valley soil, which may be an indication of soil suppressiveness. SN - 0191-2917 UR - https://www.unboundmedicine.com/medline/citation/30812452/Soilborne_Oospores_of_Phytophthora_infestans_in_Central_Mexico_Survive_Winter_Fallow_and_Infect_Potato_Plants_in_the_Field_ L2 - http://apsjournals.apsnet.org/doi/full/10.1094/PDIS.2004.88.1.29?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -