Pesticidal Activities of Callicarpa and Premna Essential Oils From Vietnam

• Published in: Natural product communications 2022-06, Vol.17 (6)
• Main Authors: Hung, Nguyen Huy, Dai, Do Ngoc, Cong, Truong Nguyen, Dung, Nguyen Anh, Linh, Le Duy, Hoa, Vo Van, Hien, Tran Thu, Chuong, Nguyen Thi Hong, Hien, Vu Thi, Nguyen, Bui Van, Setzer, William N.
• Format: Article
• Language: English
• ISSN: 1934-578X; 1555-9475
• DOI: 10.1177/1934578X221110660

Mosquito-borne diseases are a consistent problem in Vietnam. Additionally, freshwater snail species are agricultural pests and are known to be intermediate hosts for several parasitic worms. There is a need for new and complementary botanical pesticidal agents for controlling these pests and essential oils have shown promise. In this work, essential oils from 2 species of Callicarpa (C. rubella and C. sinuata) and 4 species of Premna (P. chevalieri, P. corymbosa, P. maclurei, and P. tomentosa) were screened for mosquito larvicidal activity against Aedes albopictus and Culex quinquefasciatus and for molluscicidal activity against 3 freshwater snail species, Gyraulus convexiusculus, Pomacea canaliculata, and Tarebia granifera. Callicarpa rubella essential oil showed exceptional larvicidal activity against Cx. quinquefasciatus with 24-h LC50 of 9.8 μg/mL. In addition to C. rubella, the essential oils of P. chevalieri and P. tomentosa showed notable molluscicidal activities against P. canaliculata with LC90 values ≤ 20 μg/mL. These Callicarpa and Premna essential oils were all rich in sesquiterpenes and should be considered for continued investigation as botanical pesticidal agents.