The influence of acetamiprid and chlorpyrifos on the biological activity entomopathogenic nematodes (Steinernematidae, Heterorhabditidae)

The aim of the study was to assess the influence of various concentrations (0%; 0.1%; 0.3%; 0.5%; 1%) of acetamiprid (Mospilan 20 SP) and chlorpyrifos (Dursban 450 eC) on the biological activity of entomopathogenic nematodes (Steinernema feltiae Filipjev – Steinernema-System, Biopartner; Heterorhabditis bacteriophora Poinar – B-green, Biopartner). After a 4-day contact of the nematodes with insecticides, their mortality, infectious ability and fertility was tested. Steinernema feltiae was more sensitive to used doses of plant protection products than H. bacteriophora. Both species were more susceptible to chlorpyrifos than acetamiprid. As the pesticides concentration increased, the mortality of the nematodes increased, whereas their infectious ability and fertility reduced.