Occurrence and population density of the walnut root-lesion nematode, Pratylenchus vulnus, in relation to soil disinfection and replanting of strawberry

agentes nocivos animal animal nuisible animales animales nocivos animals aschelminthes bayas cropping patterns crops cultivos economic plants facteur nuisible fraise fresa fruit crops frutales helminthe helminths helmintos injurious factors invertebrados invertebrates manejo del suelo mise en valeur du sol mode de culture monocultivo monoculture nematode nematodes nematodos nematodos de las plantas noxious animals organisme nuisible pests plagas plant nematodes plantas plante plante de culture plants pratylenchus soft fruits soil management soil sterilization strawberries