20.500.12556/RUL-171123 Root-emitted volatile organic compounds from Daucus carota modulate chemotaxis in Phasmarhabditis and Oscheius nematodes Root-emitted volatile organic compounds (VOCs) play a critical role in below-ground ecological interactions by mediating communication between plants, pests, and their natural enemies. This study investigates the chemotactic behavior of three slug-parasitic nematode species—Phasmarhabditis papillosa, Oscheius myriophilus, and Oscheius onirici—in response to four carrot (Daucus carota) root-derived VOCs: α-pinene, terpinolene, bornyl acetate, and 2-ethyl-1-hexanol. Using a modified Petri dish assay, infective juveniles (IJs) were exposed to each compound across four concentrations (pure, 1000 ppm, 10 ppm, and 0.03 ppm), and their directional movement was quantified using a chemotaxis index (CI). The results revealed strong species-specific and concentration-dependent patterns. O. myriophilus exhibited the highest motility and repellency, particularly toward bornyl acetate and terpinolene, indicating its potential for use in VOC-guided biocontrol strategies. O. onirici showed moderate but consistent attraction to most VOCs, while P. papillosa exhibited generally weak or repellent responses, especially at higher concentrations. None of the compounds tested functioned as strong attractants (CI ≥ 0.2), suggesting that plant-derived VOCs alone may not be sufficient to direct nematode recruitment under field conditions. However, their integration with other biotic cues could enhance nematode-based “lure-and-infect” systems for sustainable slug control in carrot cropping system volatile organic compounds (VOCs) Oscheius myriophilus Phasmarhabditis papillosa Oscheius onirici chemotaxis biocontrol slug-parasitic nematodes root volatiles sustainable agriculture hlapne organske spojine parazitska ogorčica Phasmarhabditis papillosa Oscheius onirici kemotaksija varstvo rastlin parazitska ogorčica polžev obrambni mehanizem rastlin hlapne spojine ekološko kmetijstvo trajnostni razvoj true false true Angleški jezik Slovenski jezik Članek v reviji 2025-08-06 15:03:49 2025-08-06 15:03:56 2025-08-07 04:13:31 0000-00-00 00:00:00 2025 0 0 17 str. iss. 8, art. 1793 Vol. 15 Jul. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 632 2073-4395 10.3390/agronomy15081793 244114435 Root-Emitted_Volatile_Organic_Compounds_from_Daucus_carota_Modulate_Chemotaxis_in_Phasmarhabditis_and_Oscheius_Nematodes.pdf Root-Emitted_Volatile_Organic_Compounds_from_Daucus_carota_Modulate_Chemotaxis_in_Phasmarhabditis_and_Oscheius_Nematodes.pdf 1 70FA9554718C68BC4C5AD2E35A54379C 81594165dfd1bdabb24907fa14598cf2299e9b04ca8525214db16fcee19cc526 22b8948d-72c6-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=213998 https://www.mdpi.com/2073-4395/15/8/1793 1 c030a26e-72c5-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=213997 Biotehniška fakulteta 0 0 0