Articles
Fusarium-infested cucumber plant debris are a suitable material for biosolarisation to control Fusarium oxysporum f. sp. radicis-cucumerinum in Almería (southeastern Spain)
Article number
1410_18
Pages
125 – 132
Language
English
Abstract
The use of plant debris in biosolarisation treatments can be an effective method for controlling soil pathogens and improving soil fertility.
However, using plant tissues infested with soil pathogens may pose a risk.
This study shows the results of two greenhouse experiments conducted in Almería, Spain, during the summer of 2022. The experimental unit consisted of 30-L containers filled with greenhouse soil, inoculated with 1×104 CFU gsoil‑1 Fusarium oxysporum f. sp. radicis-cucumerinum (FORC). Three treatments were evaluated: i) soil amended with crushed cucumber plants, including FORC-infected tissues, and sprayed with a commercial microbial product, ii): (i) + soil covered with transparent polyethylene film (biosolarisation); iii): non-amended soil covered with transparent polyethylene film (solarisation). The treatments lasted 30 days.
The experiment had a randomized block design with four replicates.
In the non-solarized treatment, the average, maximum, and minimum soil temperatures at 30 cm depth were 38.8, 48.9, and 29.0°C, respectively.
The average temperature was approximately 5°C higher in both biosolarised and solarised treatments, with maximum and minimum temperatures close to 55 and 32°C, respectively.
The number of hours where temperatures reached or exceeded 45°C were 320, 305, and 125 h for the biosolarised, solarised, and non-solarised treatments, respectively.
FORC populations were eradicated in the solarised and biosolarised treatments (mortality equal to or greater than 99.99%), while in the amended but not solarized treatment, a one fold decrease in the FORC population was observed.
As a result, damage to cucumber plants grown after the treatments was always lower and, in some cases, non-existent in the solarised and biosolarised soils.
The incorporation of Fusarium-infested cucumber plant debris to soil and solarisation for 30 days is effective in controlling FORC and provides a viable alternative for the management of infarm plant debris.
However, using plant tissues infested with soil pathogens may pose a risk.
This study shows the results of two greenhouse experiments conducted in Almería, Spain, during the summer of 2022. The experimental unit consisted of 30-L containers filled with greenhouse soil, inoculated with 1×104 CFU gsoil‑1 Fusarium oxysporum f. sp. radicis-cucumerinum (FORC). Three treatments were evaluated: i) soil amended with crushed cucumber plants, including FORC-infected tissues, and sprayed with a commercial microbial product, ii): (i) + soil covered with transparent polyethylene film (biosolarisation); iii): non-amended soil covered with transparent polyethylene film (solarisation). The treatments lasted 30 days.
The experiment had a randomized block design with four replicates.
In the non-solarized treatment, the average, maximum, and minimum soil temperatures at 30 cm depth were 38.8, 48.9, and 29.0°C, respectively.
The average temperature was approximately 5°C higher in both biosolarised and solarised treatments, with maximum and minimum temperatures close to 55 and 32°C, respectively.
The number of hours where temperatures reached or exceeded 45°C were 320, 305, and 125 h for the biosolarised, solarised, and non-solarised treatments, respectively.
FORC populations were eradicated in the solarised and biosolarised treatments (mortality equal to or greater than 99.99%), while in the amended but not solarized treatment, a one fold decrease in the FORC population was observed.
As a result, damage to cucumber plants grown after the treatments was always lower and, in some cases, non-existent in the solarised and biosolarised soils.
The incorporation of Fusarium-infested cucumber plant debris to soil and solarisation for 30 days is effective in controlling FORC and provides a viable alternative for the management of infarm plant debris.
Authors
M. de Cara García, J.I. Marín-Guirao
Keywords
greenhouse, solarisation, root and stem rot
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