Articles
SOIL-BORNE PATHOGENS ASSOCIATED TO NEW CROPS OF CHERRY TOMATO IN THE PROVINCE OF GRANADA (SPAIN)
Article number
914_16
Pages
101 – 104
Language
English
Abstract
Cherry tomato has become a major crop for the continental areas of south-eastern Spain in the last ten years, reaching more than 170 ha and increasing.
These crops are conducted under net greenhouses on dry soils that previously had been cultivated for years with typical dry Mediterranean crops (grapevine, olive, cereal). After the second year of cultivation, first phytosanitary problems appeared.
Symptoms observed in affected tomato plants reminded soil-borne causes.
Plants showed general wilt and chlorosis all along the crop cycle and particularly during the harvest period.
Losses even reached 100% dead plants in several fields.
A continuous survey was conducted from 2003 to 2008, in 4 different production areas, two in the new continental area (Los Bermejales and El Negartín) and two in the traditional coastal area (Motril and Albuñol). A total of 56 fields were surveyed and three soil-borne pathogens have been detected and isolated. Phytophthora parasitica was present in 65% of continental fields and 10% of coastal fields. Verticillium dahlia was only found in the continental fields, ranging from 29% in 2004 to 90.74% of surveyed fields in 2008 in El Negratín area.
The nematode Meloidogyne incognita was only detected in Los Bermejales area, reaching 45% of surveyed fields.
The rapid spread of these pathogens and the absence of symptoms on the previous crops (grapevine, olive and cereals) are discussed.
These crops are conducted under net greenhouses on dry soils that previously had been cultivated for years with typical dry Mediterranean crops (grapevine, olive, cereal). After the second year of cultivation, first phytosanitary problems appeared.
Symptoms observed in affected tomato plants reminded soil-borne causes.
Plants showed general wilt and chlorosis all along the crop cycle and particularly during the harvest period.
Losses even reached 100% dead plants in several fields.
A continuous survey was conducted from 2003 to 2008, in 4 different production areas, two in the new continental area (Los Bermejales and El Negartín) and two in the traditional coastal area (Motril and Albuñol). A total of 56 fields were surveyed and three soil-borne pathogens have been detected and isolated. Phytophthora parasitica was present in 65% of continental fields and 10% of coastal fields. Verticillium dahlia was only found in the continental fields, ranging from 29% in 2004 to 90.74% of surveyed fields in 2008 in El Negratín area.
The nematode Meloidogyne incognita was only detected in Los Bermejales area, reaching 45% of surveyed fields.
The rapid spread of these pathogens and the absence of symptoms on the previous crops (grapevine, olive and cereals) are discussed.
Publication
Authors
M. de Cara, M. Pérez-Vargas, M. Santos-Hernández , J.C. Tello-Marquina, D. Palmero, J. Gómez-Vázquez
Keywords
Phytophthora parasitica, Verticillium dahliae, Meloidogyne, root rot, root-knot, wilt
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