Acaricidal activities against house dust mites of spearmint oil and its constituents.
The aim of this study was to evaluate the acaricidal activities of spearmint oil and carvone derivatives against house dust mites using contact and fumigant toxicity bioassays to replace benzyl benzoate as a synthetic acaricide. Based on the LD50 values, the contact toxicity bioassay revealed that dihydrocarvone (0.95 and 0.88 µg/cm2) was 7.7 and 6.8 times more toxic than benzyl benzoate (7.33 and 6.01 µg/cm2) against Dermatophagoides farinae and Dermatophagoides pteronyssinus, respectively, followed by carvone (3.78 and 3.23 µg/cm2), spearmint oil (5.16 and 4.64 µg/cm2), carveol (6.00 and 5.80 µg/cm2), and dihydrocarveol (8.23 and 7.10 µg/cm2). Results of the fumigant toxicity bioassay showed that dihydrocarvone (2.73 and 2.16 µg/cm2) was approximately 4.0 and 4.8 times more effective than benzyl benzoate (11.00 and 10.27 µg/cm2), followed by carvone (6.63 and 5.78 µg/cm2), carveol (7.58 and 7.24 µg/cm2), spearmint oil (9.55 and 8.10 µg/cm2), and dihydrocarveol (9.79 and 8.14 µg/cm2). Taken together, spearmint oil and carvone derivatives are a likely viable alternative to synthetic acaricides for managing house dust mites.
Department of Bioenvironmental Chemistry and Institute of Agricultural Science and Technology, Chonbuk National University, Jeonju, Republic of Korea.
Ji-Yeon
JY
Yang
Department of Bioenvironmental Chemistry and Institute of Agricultural Science and Technology, Chonbuk National University, Jeonju, Republic of Korea.
Min-Gi
MG
Kim
School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
Sung-Eun
SE
Lee
Department of Bioenvironmental Chemistry and Institute of Agricultural Science and Technology, Chonbuk National University, Jeonju, Republic of Korea.
Hoi-Seon
HS
Lee
D056810:Acaricides; D000818:Animals; D031337:Mentha spicata / Q000737:chemistry*; D010571:Pest Control; D010938:Plant Oils; D039981:Pyroglyphidae
D056810:Acaricides; D010938:Plant Oils