Articles
Interaction between soil pathogenic fungi and nematodes in strawberry soil borne diseases in south Spain
Article number
1410_6
Pages
37 – 42
Language
English
Abstract
Strawberry is a high value crop in Spain, where fruits for fresh consumption are produced off season and exported to central and northern European countries.
Soil-borne pathogens (SBP) as Macrophomina phaseolina, Fusarium oxysporum f. sp. fragariae and Meloidogyne hapla are widely spread in strawberry crops in Spain and constitute a key limiting factor to achieve strawberry premium quality and economically sustainable yields, since they frequently occur together.
Interactions between soil pathogenic fungi and nematodes were analysed in pot experiments on strawberry plants ‘Rociera’ in controlled conditions, growth chambers.
Development of strawberry SBP diseases were estimated by weekly observations of the disease severity on a scale of 0 (healthy plant) to 4 (dead plant) and the disease incidence (percentage of dead plants over the total). At the end of the trial, severity of root-knot nematode nodulation symptoms in the root system, rate of nematode reproduction (Pf/Pi) and different plant growth parameters were also estimated.
There was an increase in disease symptoms in joint inoculations of phytoparasitic nematodes and soil pathogenic fungi, suggesting an additive interaction between them in the strawberry SBP caused diseases.
Specifically, significant differences were observed between the untreated controls and the interactions M. hapla + F. oxysporum f. sp. fragariae and M. hapla + M. phaseolina. At harvest, most of the isolates obtained from strawberry tissues in plants co-inoculated with M. phaseolina and F. oxysporum f. sp. fragariae were M. phaseolina, which suggests that M. phaseolina has the capacity to displace F. oxysporum f. sp. fragariae in strawberry, when occurring together.
Soil-borne pathogens (SBP) as Macrophomina phaseolina, Fusarium oxysporum f. sp. fragariae and Meloidogyne hapla are widely spread in strawberry crops in Spain and constitute a key limiting factor to achieve strawberry premium quality and economically sustainable yields, since they frequently occur together.
Interactions between soil pathogenic fungi and nematodes were analysed in pot experiments on strawberry plants ‘Rociera’ in controlled conditions, growth chambers.
Development of strawberry SBP diseases were estimated by weekly observations of the disease severity on a scale of 0 (healthy plant) to 4 (dead plant) and the disease incidence (percentage of dead plants over the total). At the end of the trial, severity of root-knot nematode nodulation symptoms in the root system, rate of nematode reproduction (Pf/Pi) and different plant growth parameters were also estimated.
There was an increase in disease symptoms in joint inoculations of phytoparasitic nematodes and soil pathogenic fungi, suggesting an additive interaction between them in the strawberry SBP caused diseases.
Specifically, significant differences were observed between the untreated controls and the interactions M. hapla + F. oxysporum f. sp. fragariae and M. hapla + M. phaseolina. At harvest, most of the isolates obtained from strawberry tissues in plants co-inoculated with M. phaseolina and F. oxysporum f. sp. fragariae were M. phaseolina, which suggests that M. phaseolina has the capacity to displace F. oxysporum f. sp. fragariae in strawberry, when occurring together.
Authors
M. Talavera, M.D. Vela, B. de los Santos
Keywords
Fusarium, Meloidogyne, Macrophomina, strawberry
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