Insecticidal property of terpenes against maize weevil, Sitophiluszeamais (Motschulsky)

Journal of Biopesticides

article

Mukesh Kumar Chaubey¹ 

[1] Department of Zoology, National Post Graduate College

关键词: α-Pinene;    β-Caryophyllene;    Sitophilus zeamais;    Oviposition inhibition;   

DOI  :  10.57182/jbiopestic.15.2.92-102

学科分类：环境科学（综合）

来源: Journal of Biopesticides

【 摘 要 】

Synthetic pesticides are used indiscriminately in insect pest management, which damages theozone layer and causes resistance in target organisms as well as neurotoxicity, carcinogenicity,teratogenicity and mutagenesis in non-target organisms. Due to these negative consequences,research is now focused on using plant-based techniques to control insect pests. The maize weevil,Sitophilus zeamais (Coleoptera: Curculionidae), was tested in the laboratory to determine theinsecticidal effects of two pure essential oil constituents, namely α-pinene and β-caryophyllene.These two terpenes were tested against S. zeamais for their toxic, ovipositional, developmental,and feeding inhibitory effects. When S. zeamais adults were fumigated for 24 and 48hrs, themedian lethal concentrations (LC50) of α-pinene and β-caryophyllene were 0.412 and 0.305 µlcm-3and 0.486 and 0.315 µlcm-3air respectively. When S. zeamais adults were exposed for 24 and48hrs in a contact toxicity assay, the LC50 values for α-pinene and β-caryophyllene were 0.388 and0.256 µlcm-2 and 0.308 and 0.216 µlcm-2 area respectively. Adults exposed to sub-lethalconcentrations of both terpenes experienced decreased acetylcholine esterase (AChE) enzymeactivity. In S. zeamais, α-pinene and β-caryophyllene decreased oviposition, progeny output andeating. According to this study, α-pinene and β-caryophyllene can be used to makeenvironmentally acceptable formulations and as a substitute for synthetic insecticides.

【 授权许可】

CC BY