›› 2012, Vol. 55 ›› Issue (12): 1355-1361.doi:

• RESEARCH PAPERS • Previous Articles     Next Articles

Insecticidal activities and active ingredients of Cacalia tangutica against Musca domestica and Aedes albopictus

HUANG Ji-Guang, Zhao-Huan-Huan, Miao-Hui, Xu-Han-Hong   

  • Received:2012-09-07 Revised:2012-12-16 Online:2012-12-20 Published:2012-12-20
  • Contact: HUANG Ji-Guang E-mail:hnnyzx@scau.edu.cn
  • About author:hnnyzx@scau.edu.cn

Abstract: To study the insecticidal activities and active ingredients of Cacalia tangutica, the methanol extracts of C. tangutica against Musca domestica and Aedes albopictus were bioassayed with feeding method and dipping method. The active ingredients of C. tangutica were isolated and identified. Results indicated that the methanol extracts from different parts of C. tangutica showed highly insecticidal activities against adult M. domestica and the 4th instar larvae of A. albopictus. Nine compounds (stigmasterol, friedelin, 7-hydroxy-8-methoxycoumarin, umbelliferone, daphnetin, daphnetin-8-O-β-D-glucopyranoside, quercetin, kaempferol and β-daucosterol) were isolated and identified from extracts of leaves and flowers of C. tangutica. Among them, friedelin, quercetin and kaempferol were firstly isolated from this plant. At 48 h after treatment, the corrected mortalities of adult M. domestica caused by friedelin, quercetin and kaempferol at the dosage of 500 μg/g were 88.33%, 69.90% and 77.04%, respectively. At 72 h after treatment, the corrected mortalities of the 4th instar larvae of A. albopictus caused by friedelin, quercetin and kaempferol at the concentration of 50 μg/g were 88.49%, 72.22% and 71.06%, respectively. The studies suggest that C. tangutica would be a promising control agent on medical insects and deserves a further study.

Key words: Cacalia tangutica; Musca domestica; Aedes albopictus, insecticidal activities, chemicals