Pregnant female mushroom mites, Luciaphorus perniciosus Rack were fumigated with the
essential oils from clove (Syzygium aromaticum), citronella grass (Cymbopogon nardus),
lemon grass (Cymbopogon citratus) and turmeric (Curcuma longa).. The essential oils at
various concentrations from 0 to 75 μg/cm3 in 2% Tween-20 in water were placed into 16 cm3
glass vials and fumigated for 2 hrs at XX oC. Hatching of adults mites was observed for 7
days. At 75 μg/cm3, lemon grass and citronella grass essential oils had the highest inhibition
effect, resulting in 97.3 and 95.8% mortality, respectively. Turmeric and clove essential oils
were less effective and had 63.8 and 39.2% mortality, respectively. Lemon grass and citronella
grass essential oils median effective concentration (EC50) fwas 18.15 and 19.66 μg/cm3,
respectively. Whereas, turmeric and clove essential oils had EC50 of 41.79 and 82.09 μg /cm3,
respectively.