Fungicidal and nematicidal activities for essential oils formulated in Janus emulsion

Abstract

This study investigated the nematicidal and fungicidal activities of the two immiscible camphor and orange oils formulated in Janus emulsion (JE). JE was prepared from camphor and orange oils by a single-step emulsification with different concentrations chosen from an established phase diagram. Camphor oil nematicidal activity was studied against the root knot nematode Meloidogyne incognita, while orange oil fungicidal activity was studied against the wilt fungus Fusarium oxysporum f. sp. lycopersici (Fol). For a comparison study, different concentrations of JE and double emulsions were prepared. Results showed that JE had a significant mortality effect on the second-stage juveniles (J2s) M. incognita with 81% mortality and was able to delay the growth of Fol four and seven days after exposure, while changes in the efficiency of DE were recorded. Prepared JEs were shown to maintain the efficiency and to have slow release profiles for encapsulated oils.