抄録
In warm upland farming areas of Japan sweet
potatoes are cultivated in fields with diverse conditions.
Differences in field conditions may influence the
occurrence of plant-parasitic nematodes. We investigated
plant-parasitic nematode fauna, field conditions, and
their relationships in a typical warm upland farming area
of southern Kyushu, Japan. Plant-parasitic nematodes,
primarily Meloidogyne spp. and Rotylenchulus reniformis,
were frequently detected as already reported. The density
of R. reniformis was higher in the land category,“ upland”
than in “paddy” fields. A positive correlation was
detected between the degree of field dryness, estimated
by topography, and R. reniformis density. Andosols
typically exhibit a higher phosphate adsorption coefficient
compared to lowland soils, and positive correlations were
observed between this coefficient and both the densities
of Meloidogyne spp. and R. reniformis. These results
suggest that soil properties and field dryness may be
important factors to consider in future nematode control
strategies.
https://ror.org/023v4bd62 
