Effects of Essential Oils from 24 Plant Species on Sitophilus zeamais Motsch (Coleoptera, Curculionidae)

Chemical control of the maize weevil ( ) has been ineffective and presents serious collateral damage. Among plant-derived insecticides, essential oils (EOs) are suitable candidates to control this stored products pest. In this work, the insecticidal activities of 45 natural EOs against adults were s...

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Bibliographic Details
Published in:	Insects (Basel, Switzerland) Vol. 12; no. 6; p. 532
Main Authors:	Patiño-Bayona, William R, Nagles Galeano, Leidy J, Bustos Cortes, Jenifer J, Delgado Ávila, Wilman A, Herrera Daza, Eddy, Suárez, Luis E Cuca, Prieto-Rodríguez, Juliet A, Patiño-Ladino, Oscar J
Format:	Journal Article
Language:	English
Published:	Switzerland MDPI AG 08-06-2021 MDPI
Subjects:	Adults Biocompatibility Carvone Chemical composition Chemical control Cluster analysis Constituents Contact Control methods Corn Economic impact essential oil Essential oils Flowers & plants Food security fumigant toxicity Grain Grain storage Humidity Hydrocarbons Impact analysis Insecticides Insects Monoterpenes Mortality Oils & fats Pest control Pests Plant extracts Plant species Plants Polyethylene glycol Pulegone repellent Sitophilus zeamais Stored products topic toxicity Toxicity Toxicity testing Colombia Sitophilus zeamais fumigant toxicity topic toxicity essential oil repellent
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Summary:	Chemical control of the maize weevil ( ) has been ineffective and presents serious collateral damage. Among plant-derived insecticides, essential oils (EOs) are suitable candidates to control this stored products pest. In this work, the insecticidal activities of 45 natural EOs against adults were screened, and the most promising ones (24 EOs) were characterized by GC-MS. The repellent and toxic effects (contact and fumigant) of these 24 EOs were determined, and by a cluster analysis they were classified into two groups considering its fumigant activity and contact toxicity. For the EOs with the highest fumigant potential (14 oils) and their main active constituents (17 compounds), lethal concentrations were determined. The most active EOs were those obtained from and , with LC values of 303.4 and 254.1 µL/L air and characterized by a high content of monoterpenes. Regarding the major compounds, the oxygenated monoterpenes R-(+)-pulegone (LC = 0.580 mg/L air), S-(-)-pulegone (LC = 0.971 mg/L air) and R-(-)-carvone (LC = 1.423 mg/L air) were the most active, as few variations in their concentrations significantly increased insect mortality.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2075-4450 2075-4450
DOI:	10.3390/insects12060532