Essential Oils of Hyptis pectinata Chemotypes: Isolation, Binary Mixtures and Acute Toxicity on Leaf-Cutting Ants
AbstractLeaf-cutting ants are pests of great economic importance due to the damage they cause to agricultural and forest crops. The use of organosynthetic insecticides is the main form of control of these insects. In order to develop safer technology, the objective of this work was to evaluate the formicidal activity of the essential oils of two Hyptis pectinata genotypes (chemotypes) and their major compounds on the leaf-cutting ants Acromyrmex balzani Emery and Atta sexdens rubropilosa Forel. Bioassays of exposure pathways (contact and fumigation) and binary mixtures of the major compounds were performed. The major compounds identified in the essential oils of H. pectinata were β-caryophyllene, caryophyllene oxide and calamusenone. The essential oils of H. pectinata were toxic to the ants in both exposure pathways. Essential oils were more toxic than their major compounds alone. The chemotype calamusenone was more toxic to A. balzani in both exposure pathways. A. sexdens rubropilosa was more susceptible to the essential oil of the chemotype β-caryophyllene in both exposure pathways. In general, the binary mixtures of the major compounds resulted in additive effect of toxicity. The essential oils of H. pectinata is a raw material of great potential for the development of new insecticides. View Full-Text
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Feitosa-Alcantara, R.B.; Bacci, L.; Blank, A.F.; Alves, P.B.; Silva, I.M.A.; Soares, C.A.; Sampaio, T.S.; Nogueira, P.C.L.; Arrigoni-Blank, M.F. Essential Oils of Hyptis pectinata Chemotypes: Isolation, Binary Mixtures and Acute Toxicity on Leaf-Cutting Ants. Molecules 2017, 22, 621.
Feitosa-Alcantara RB, Bacci L, Blank AF, Alves PB, Silva IMA, Soares CA, Sampaio TS, Nogueira PCL, Arrigoni-Blank MF. Essential Oils of Hyptis pectinata Chemotypes: Isolation, Binary Mixtures and Acute Toxicity on Leaf-Cutting Ants. Molecules. 2017; 22(4):621.Chicago/Turabian Style
Feitosa-Alcantara, Rosana B.; Bacci, Leandro; Blank, Arie F.; Alves, Péricles B.; Silva, Indira M.A.; Soares, Caroline A.; Sampaio, Taís S.; Nogueira, Paulo C.L.; Arrigoni-Blank, Maria F. 2017. "Essential Oils of Hyptis pectinata Chemotypes: Isolation, Binary Mixtures and Acute Toxicity on Leaf-Cutting Ants." Molecules 22, no. 4: 621.
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