Biodisinfestation With Agricultural By-Products Developed Long-Term Suppressive Soils Against Meloidogyne incognita in Lettuce Crop

Soil biodisinfestation is the process generated after incorporation of organic amendments followed by a plastic cover to control soilborne diseases. Among amendments, use agricultural by-products could be an interesting alternative as it promotes circular economy. In this study, beer bagasse and defatted rapeseed cake together with fresh cow manure were incorporated into soil (1.5, 0.5, 20 kg/m 2 , weight, respectively) assess their capacity reduce disease incidence caused root-knot nematode Meloidogyne incognita in protected lettuce crops develop suppressive soils. The trial was conducted commercial greenhouse for 7 weeks during which temperature continuously recorded at three different depths (15, 30, 45 cm). Short- long-term effects assessed: before treatment, first crop post-treatment one year post-treatment. Disease changes community structure analyzed along microbiological properties general physicochemical parameters. After biodisinfestation, activity significantly increased treated soils detected detriment M. other plant-parasitic nematodes. These more apparent than right biodisinfestation. yield plots root galling indices lower. One differences between treatments observed damage that remained lower plots. trial, addition treatment demonstrated nematicidal against . Moreover, we suggest compounds released degradation these sub-lethal temperatures achieved (<42°C) key long-term.