摘要：In this study, the isolation frequency and density of infectious units of entomopathogenic fungi (EPF) in soils from orchards in different farming systems were determined. Soil samples were collected from the fallow and sward strips of apple orchards under various production regimes, including organic, conventional, and integrated pest management (IPM). There were no significant differences for EPF density in organic and conventional orchards, but there were substantial differences between sward strips and fallows, depending on the farming system. The density of soilborne EPF from organic orchards was significantly higher in the fallow than the sward strip. The density of soilborne EPF from the herbicide-treated fallow was significantly lower samples from the sward strip in conventional production. The density of soilborne EPF in the orchards using an IPM program was higher in the herbicide-treated fallow than in the sward strip. Among the four isolated species of entomopatho- genic fungi, Metarhizium anisopliae (sensu lato) was the most abundant.
