Naturally occurring entomopathogenic nematodes in the province of West-Flanders, Belgium

belgique belgium dunas dune dunes ecologia ecologie ecology encuestas entomophilic nematodes fauna del suelo faune du sol grasslands habitat habitats herbage heterorhabditis insect nematodes invertebrados invertebrates nematodos de insectos pathogens praderas sandy soils soil fauna sol sableux steinernema steinernema feltiae suelo arenoso surveys textural soil types tipos texturales de suelos type de sol textural woodlands