Abstract
Damping-off and root rot are major diseases affectingseedlings of Eucalyptus species in forestnurseries in temperate regions in Argentina. The mostcommon fungi associated with these diseases andaffecting the vigor of the root system are Fusarium and Pythium species. Two forestnursery experiments were conducted in the province ofBuenos Aires, Argentina, to determine the effect ofsoil solarization on growth of Eucalyptusviminalis seedlings and relate this effect to thepresence of pathogenic and native ectomycorrhizaepopulations in roots and nutrient availability insoil. Changes in populations of soilborne pathogenswere determined by a bioassay that relates theirpotential to induce disease. Changes in nativeectomycorrhizae were assesed by measuring colonizationlevels in roots. Nutrient availability was determinedby the amount of nitrates released by solarization.Solar heating decreased pathogenic and ectomycorrhizalinoculum potential and increased soil nitrates.Seedling growth in solarized seedbeds may be relatedto a low initial pathogenic population and/or toincreases in nitrate availability. Solarization mayinduce soil suppressiveness against re-establishmentof major seedling pathogens in treated soils.
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Salerno, M.I., Lori, G.A., Giménez, D.O. et al. Use of soil solarization to improve growth of eucalyptus forest nursery seedlings in Argentina. New Forests 20, 235–248 (2000). https://doi.org/10.1023/A:1006779308611
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DOI: https://doi.org/10.1023/A:1006779308611