Biological activity of Myrtaceae plant essential oils and their major components against Drosophila suzukii (Diptera: Drosophilidae).
BACKGROUND
The spotted-wing drosophila (SWD), Drosophila suzukii (Matsumura), is a globally invasive and serious pest of numerous soft-skinned fruit crops. Assessments were made of fumigant and contact toxicities of 12 Myrtaceae plant essential oils (EOs) and their components. For determining the mode of action of major components of active EOs, their activities against acetylcholinesterase (AChE) and Glutathione S-transferase (GST) were also assessed.


RESULTS
Strong fumigant and contact toxicities were observed from EOs of Eucalyptus citriodora and Melaleuca teretifolia. The main components of E. citriodora were citronellal and isopulegol, whereas those of M. teretifolia were neral and geranial. Geranial showed the strongest fumigant activity, followed by citronellal or neral, M. teretifolia EO, isopulegol and E. citriodora EO. In contact toxicity assays, geranial also exhibited the strongest insecticidal activity, followed by neral or M. teretifolia EO, citronellol, citronellal, isopulegol and E. citriodora EO. Among the major components, all compounds showed low AChE inhibitory activity, while neral and geranial showed GST inhibitory activity against SWD.


CONCLUSIONS
Myrtaceae plant EOs and their components have an excellent potential for being used in the control of SWD adults and could be useful in the development of more effective natural compounds as alternatives to synthetic pesticides. © 2016 Society of Chemical Industry.
Division of Applied Life Science (BK21+ Program), Gyeongsang National University, Jinju, Republic of Korea.
Miyeon
M
Jang
Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, Republic of Korea.|Forest Insect Pests and Diseases Division, National Institute of Forest Science, Seoul, Republic of Korea.
Junheon
J
Kim
Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea.
Kyungjae Andrew
KA
Yoon
Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea.
Si Hyeock
SH
Lee
Division of Applied Life Science (BK21+ Program), Gyeongsang National University, Jinju, Republic of Korea.|Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, Republic of Korea.|Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea.
Chung Gyoo
CG
Park
D000110:Acetylcholinesterase / Q000378:metabolism; D000818:Animals; D002800:Cholinesterase Inhibitors / Q000494:pharmacology; D004330:Drosophila / Q000201:enzymology; D005982:Glutathione Transferase / Q000037:antagonists & inhibitors; D007306:Insecticides; D027822:Myrtaceae / Q000737:chemistry*; D009822:Oils, Volatile / Q000494:pharmacology
D002800:Cholinesterase Inhibitors; D007306:Insecticides; D009822:Oils, Volatile; D005982:Glutathione Transferase; D000110:Acetylcholinesterase
AChE; GST; contact toxicity; fumigant; spotted-wing drosophila