Contact and Repellent Activities of the Essential Oil from Juniperus formosana against Two Stored Product Insects

Molecules

卷:21

Wenjuan Zhang¹  Chunxue You¹  Chengfang Wang¹  Zhufeng Geng¹  Shushan Du¹  Shanshan Guo¹  Junyu Liang¹ 

[1] Beijing Key Laboratory of Traditional Chinese Medicine Protection and Utilization, Beijing Normal University, Beijing 100875, China;

关键词: Juniperus formosana;    Tribolium castaneum;    Liposcelis bostrychophila;    contact toxicity;    repellency;   

DOI  :  10.3390/molecules21040504

来源: DOAJ

【 摘 要 】

The chemical composition of the essential oil from Juniperus formosana leaves and its contact and repellent activities against Tribolium castaneum and Liposcelis bostrychophila adults were investigated. The essential oil of J. formosana leaves was obtained by hydrodistillation and analyzed by GC-MS. A total of 28 components were identified and the main compounds in the essential oil were α-pinene (21.66%), 4-terpineol (11.25%), limonene (11.00%) and β-phellandrene (6.63%). The constituents α-pinene, 4-terpineol and d-limonene were isolated from the essential oil. It was found that the essential oil exhibited contact activity against T. castaneum and L. bostrychophila adults (LD50 = 29.14 μg/adult and 81.50 µg/cm2, respectively). The compound 4-terpineol exhibited the strongest contact activity (LD50 = 7.65 μg/adult). In addition, data showed that at 78.63 nL/cm2, the essential oil and the three isolated compounds strongly repelled T. castaneum adults. The compounds α-pinene and d-limonene reached the same level (Class V) of repellency as DEET (p = 0.396 and 0.664) against L. bostrychophila at 63.17 nL/cm2 after 2 h treatment. The results indicate that the essential oil and the isolated compounds have potential to be developed into natural insecticides and repellents to control insects in stored products.

【 授权许可】

Unknown