Gas chromatography-Mass Spectrometry (GC-MS), Computational Analysis, and In Vitro Effect of Essential Oils from Two Aromatic Plants, Bubonium graveolens and Launaea arborescens Growing in Southwest Algeria Against Potato Cyst Nematodes

The study tested the nematicidal effects of essential oils from Bubonium graveolens and Launaea arborescens on the potato cyst nematode Globodera rostochiens. The chemical composition of the essential oils was analyzed using GC-MS. To determine the concentration that killed 50% of the nematode population (LC50), five concentrations of the essential oils were applied to the tested organisms. The effects of essential oils on the hatching of cyst nematode (Globodera rostochiensis sp.) eggs in vitro demonstrated a wide variety of effects ranging from no impact to mild, moderate, and strong effects, which increased dramatically with exposure duration and concentration. All the oils examined were capable of causing Globodera cysts to hatch, although the effects varied depending on the type of oil used, how long it was exposed to, and its concentration. The percentage of nematode mortalities ranged from 7.14 to 78.56% for Bubonium graveolens, 7.14 to 85.71% for Launaea arborescens, and 64.38 to 73.31% for the nematode control. This study investigated the effects of bioactive compounds from Bubonium graveolens and Launaea arborescens plants on the body and the molecular mechanisms underlying cyst nematode egg hatching. Asteraceae, bionematicide, Bubonium graveolens, Globodera rostochiensis , Launaea arborescens.