Evaluation of the composition and fumigant toxicity against Plodia interpunctella of essential oils from Ajania potaninii and Ajania fruticulosa

• Published in: Journal of Asia-Pacific entomology Vol. 24; no. 4; pp. 1235 - 1238
• Main Authors: Shao, Yazhou, Ning, Anqi, An, Yue, Hou, Zhibo, Zhou, Feng, He, Chuyu, Zhang, Ji, Liang, Junyu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2021; 한국응용곤충학회
• Subjects: Ajania fruticulosa; Ajania potaninii; Essential Oils; Fumigant toxicity; Plodia interpunctella; 농학; Ajania potaninii; Plodia interpunctella; Essential Oils; Ajania fruticulosa; Fumigant toxicity
• ISSN: 1226-8615; 1876-7990
• DOI: 10.1016/j.aspen.2021.08.012

[Display omitted] •Essential oils and their main components of Ajania potaninii and Ajania fruticulosa showed effective anti-insect properties.•Fumigant toxicity of Poldia interpunctella were evaluated.•Ajania potaninii and Ajania fruticulosa have potential to serve as bio-insecticides. Indian meal moth, Plodia interpunctella (Lepidoptera: Pyralidae), is a worldwide omnivorous pest. It is the primary insect pest in many economically important stored crops. The insecticidal activity of essential oils (EOs) extracted from Ajania potaninii and Ajania fruticulosa were evaluated against Plodia interpunctella. EOs obtained by hydro-distillation were analyzed by GC–MS. Fumigant toxicity testing indicated that both EOs and their main components were toxic to P. interpunctella adults. 1,8-Cineole exhibited the strongest activity, having an LC50 of 0.86 mg/L air and being twice as active as camphor. Myrtenol was also strongly toxic to P. interpunctella adults (LC50 0.99 mg/L air), while camphor, verbenol, borneol, and the two complete EOs exhibited lower toxicity. None of the EOs or main components exhibited significant toxicity against the larvae of P. interpunctella. This study provides evidence of the individual active substances accounting for the insecticidal activity of EOs from A. potaninii and A. fruticulosa. These EOs have potential as biological insecticides for controlling insect pest damage in stored crops.