values achieved for the reference compounds (95). 4Asp was further characterized by significantly worse activity toward confused flour beetle larvae than the rest of the tested compounds and reference substances. Also in our previous studies, we observed that excessive hydrophilicity of the cation can negatively affect deterrent activitycholine analogs and compounds containing hydroxyl or ester groups in the cations are generally characterized by worse T values compared to QASs with cations based on synthetic surfactants with long alkyl chains .