Chemotactic responses of slug-parasitic nematodes to barley root-emitted volatile organic compounds

Laznik, Žiga (avtor), Trdan, Stanislav (avtor)

Parasitic nematodes play a vital role in soil ecosystems, contributing to natural pest suppression. Among them, slug-parasitic species such as Phasmarhabditis papillosa (Schneider) Andrassy, Oscheius myriophilus (Poinar), and Oscheius onirici Torrini et al. are promising biological control agents against mollusk pests. These nematodes rely on plantemitted volatile organic compounds (VOCs) for host location, yet their chemotactic responses to specific VOCs remain unclear. This study assessed the responses of P. papillosa, O. myriophilus, and O. onirici to VOCs emitted by potato (S. tuberosum) tubers under varying temperature (18 °C, 22 °C) and concentration conditions (pure compound, 0.03 ppm). The results indicate that octanal was the strongest attractant, particularly for O. myriophilus, while nonanal exhibited species-dependent effects. Hydrocarbons such as undecane and 1,2,4-trimethylbenzene had minimal or repellent effects, whereas 6-methyl-5-hepten-2-one showed moderate attraction. Chemotactic responses were stronger at 18 °C, and attraction increased with higher VOC concentrations, suggesting a threshold-dependent response. These findings enhance our understanding of plantnematode interactions and suggest that octanal and 6-methyl-5-hepten-2-one could improve nematode-based slug control strategies. However, environmental factors such as soil composition and microbial activity may influence VOC diffusion and nematode recruitment. Future research should focus on optimizing VOC formulations, assessing field applicability, and integrating these findings into sustainable pest management programs.

• Jezik: Angleški jezik
• Ključne besede: slug-parasitic nematodes, Phasmarhabditis papillosa, Oscheius myriophilus, Oscheius onirici, volatile organic compounds, VOCs, chemotaxis, barley roots, biocontrol, temperature effects, plant–nematode interactions, belowground ecology
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 13 str.
• Številčenje: Vol. 15, iss. 9, art. 2162
• PID: 20.500.12556/RUL-172673
• UDK: 632
• ISSN pri članku: 2073-4395
• DOI: 10.3390/agronomy15092162
• COBISS.SI-ID: 248442883
• Datum objave v RUL: 10.09.2025

Gradivo je del revije

• Naslov: Agronomy
• Skrajšan naslov: Agronomy
• Založnik: MDPI AG
• ISSN: 2073-4395
• COBISS.SI-ID: 522953241

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: biotično varstvo rastlin, koristni organizmi, parazitske ogorčice, nematode, hlapne organske spojine, kemotaksija, biološki nadzor, polži