Acute Toxicity and Sublethal Effects of Lemongrass Essential Oil and Their Components against the Granary Weevil, Sitophilus granarius

Autor: Gabriela da Silva Rolim, José Cola Zanuncio, José Eduardo Serrão, Carlos Frederico Wilcken, Angelica Plata-Rueda, Luis Carlos Martínez
Přispěvatelé: Universidade Federal de Viçosa (UFV), Universidade Estadual Paulista (Unesp)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Insects
Volume 11
Issue 6
Insects, Vol 11, Iss 379, p 379 (2020)
Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 2075-4450
DOI: 10.3390/insects11060379
Popis: In the present work, we evaluate the toxic and repellent properties of lemongrass (Cymbopogon citratus (DC. ex Nees) Stapf.) essential oil and its components against Sitophilus granarius Linnaeus as an alternative to insecticide use. The lethal dose (LD50 and LD90), survivorship, respiration rate, and repellency on adults of S. granarius exposed to different doses of lemongrass oil and some of its components were evaluated. The chemical composition of the essential oil was found to have the major components of neral (24.6%), citral (18.7%), geranyl acetate (12.4%), geranial (12.3%), and limonene (7.55%). Lemongrass essential oil (LD50 = 4.03 µ
g insect&ndash
1), citral (LD50 = 6.92 µ
1), and geranyl acetate (LD50 = 3.93 µ
1) were toxic to S. granarius adults. Survivorship was 99.9% in insects not exposed to lemongrass essential oil, decreasing to 57.6%, 43.1%, and 25.9% in insects exposed to LD50 of essential oil, citral, and geranyl acetate, respectively. The insects had low respiratory rates and locomotion after exposure to the essential oil, geranyl acetate, and citral. Our data show that lemongrass essential oils and their components have insecticidal and repellent activity against S. granarius and, therefore, have the potential for application in stored grain pest management schemes.
Databáze: OpenAIRE
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