Abstract
The period of persistence of entomopathogenic nematodes (EPNs) in soil is an important factor in the success of biological control efforts. In this study, the persistency of four native Turkish entomopathogenic nematode species, Steinernema feltiae (Filipjev), S. carpocapsae (Weiser), S. affine (Bovien) and Heterorhabditis bacteriophora (Poinar), was investigated in a peach orchard after their application with a drip irrigation system in Çanakkale Province, Turkiye, in 2018 and 2019. The EPNs were applied at the rate of 50 IJs/cm2. After application, the persistency of the EPNs was determined with soil sampling on a monthly basis. EPN persistence in the soil was 90 days and 150 days in 2018 and 2019, respectively. Additionally, the persistency of the EPNs in soil after their application varied, depending on environmental factors. The longer survival of EPNs in soil after application is important for the increase of the efficiency of EPNs against pests. It was concluded that the local EPN species have potential for use in the biological control of agricultural pests.
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