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ASPHC Baner

Vol. 24 No. 3 (2025)

Articles

Understanding the impact of acetamiprid-based insecticides on the biological fitness of entomopathogenic nematodes: implications for biological control

DOI: https://doi.org/10.24326/asphc.2025.5482
Submitted: 13 January 2025
Published: 30.06.2025

Abstract

The impact of acetamiprid-based insecticides on the survival and activity of entomopathogenic nematodes (EPNs) was evaluated in laboratory, focusing on two species, Steinernema feltiae and Heterorhabditis bacteriophora. Despite variations in sensitivity, with S. feltiae showing greater susceptibility, both species maintained their ability to infect Galleria mellonella larvae after exposure. Exposure to  Mospilan 20 SP® significantly decreased the reproductive capacity of S. feltiae (F = 443.215, p < 0.001), while H. bacteriophora showed greater resilience, especially when exposed to and Kobe 20 SP®. The ED50 values for H. bacteriophora increased over time with Kobe 20 SP® (0.46 ±0.04 at 24 h to 0.60 ±0.01 at 96 h), while Mospilan 20 SP®  decreased the ED50 for S. feltiae (0.55 ±0.02 at 24 h to 0.64 ±0.03 at 96 h). The study highlights that the effects of systemic insecticides extend beyond immediate mortality, influencing reproductive potential and long-term viability, particularly for more sensitive species like S. feltiae. These findings raise important considerations for integrating EPNs into pest management strategies, especially in systems reliant on chemical pesticides. Further research is recommended to explore the broader ecological impacts of neonicotinoids on beneficial nematodes and their potential interactions with other biocontrol agents, aiming to enhance the sustainability of integrated pest management systems.

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