Synergism in Two-Component Insecticides with Dillapiole against Fall Armyworm
The fall armyworm (<i>Spodoptera frugiperda</i>), a polyphagous insect pest, is a major threat to food production, rapidly spreading through all the tropical areas in the world. Resistance has developed to the control protocols used so far (pyrethroids, organophosphorus, and genetically...
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MDPI AG
2023-08-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/12/17/3042 |
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| author | Murilo Fazolin Humberto R. Bizzo André F. M. Monteiro Maria E. C. Lima Natália S. Maisforte Paola E. Gama |
| author_facet | Murilo Fazolin Humberto R. Bizzo André F. M. Monteiro Maria E. C. Lima Natália S. Maisforte Paola E. Gama |
| author_sort | Murilo Fazolin |
| collection | DOAJ |
| description | The fall armyworm (<i>Spodoptera frugiperda</i>), a polyphagous insect pest, is a major threat to food production, rapidly spreading through all the tropical areas in the world. Resistance has developed to the control protocols used so far (pyrethroids, organophosphorus, and genetically modified plants), and alternative strategies must be found. The bioactivity in essential oils is usually associated with the major constituents, but synergistic interactions among the constituents (even minor ones) can improve the levels of activity considerably. Herein, we tested the insecticidal activity of several constituents of the essential oil from <i>Piper aduncum</i>, an Amazonian Piperaceae, both separately and as binary mixtures, through their application on the dorsal side of the larva pronotum. Dillapiole proved to be, isolated, the most active compound in this oil (LD<sub>50</sub> = 0.35 ppm). In binary mixtures, a strong synergistic effect was observed for the pairs of dillapiole with β-caryophyllene (LD<sub>50</sub> = 0.03 ppm), methyl eugenol (LD<sub>50</sub> = 0.05 ppm), and α-humulene (LD<sub>50</sub> = 0.05 ppm). In some cases, however, antagonism was recorded, as for dillapiole + β-pinene (LD<sub>50</sub> = 0.44 ppm). The use of binary mixtures of essential oil constituents as low-environmental-toxicity insecticides allows a fine tuning of the insecticidal activity, and the exploitation of synergy effects. |
| first_indexed | 2024-03-10T23:15:51Z |
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| language | English |
| last_indexed | 2024-03-10T23:15:51Z |
| publishDate | 2023-08-01 |
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| record_format | Article |
| series | Plants |
| spelling | doaj.art-dcc4c762a2ea4c9594616dd93c7c37fc2023-11-19T08:40:30ZengMDPI AGPlants2223-77472023-08-011217304210.3390/plants12173042Synergism in Two-Component Insecticides with Dillapiole against Fall ArmywormMurilo Fazolin0Humberto R. Bizzo1André F. M. Monteiro2Maria E. C. Lima3Natália S. Maisforte4Paola E. Gama5Embrapa Acre, Rodovia BR 364, km 14, Rio Branco 69900-970, AC, BrazilEmbrapa Agroindústria de Alimentos, Avenida das Américas 29501, Rio de Janeiro 23020-470, RJ, BrazilEmbrapa Acre, Rodovia BR 364, km 14, Rio Branco 69900-970, AC, BrazilPrograma de Pós-Graduação em Agropecuária nos Trópicos Úmidos, Universidade Federal do Acre, Rodovia BR 364, km 04, Rio Branco 69920-900, AC, BrazilInstituto Federal do Acre, Avenida Brasil 920, Rio Branco 69903-068, AC, BrazilEmbrapa Agroindústria de Alimentos, Avenida das Américas 29501, Rio de Janeiro 23020-470, RJ, BrazilThe fall armyworm (<i>Spodoptera frugiperda</i>), a polyphagous insect pest, is a major threat to food production, rapidly spreading through all the tropical areas in the world. Resistance has developed to the control protocols used so far (pyrethroids, organophosphorus, and genetically modified plants), and alternative strategies must be found. The bioactivity in essential oils is usually associated with the major constituents, but synergistic interactions among the constituents (even minor ones) can improve the levels of activity considerably. Herein, we tested the insecticidal activity of several constituents of the essential oil from <i>Piper aduncum</i>, an Amazonian Piperaceae, both separately and as binary mixtures, through their application on the dorsal side of the larva pronotum. Dillapiole proved to be, isolated, the most active compound in this oil (LD<sub>50</sub> = 0.35 ppm). In binary mixtures, a strong synergistic effect was observed for the pairs of dillapiole with β-caryophyllene (LD<sub>50</sub> = 0.03 ppm), methyl eugenol (LD<sub>50</sub> = 0.05 ppm), and α-humulene (LD<sub>50</sub> = 0.05 ppm). In some cases, however, antagonism was recorded, as for dillapiole + β-pinene (LD<sub>50</sub> = 0.44 ppm). The use of binary mixtures of essential oil constituents as low-environmental-toxicity insecticides allows a fine tuning of the insecticidal activity, and the exploitation of synergy effects.https://www.mdpi.com/2223-7747/12/17/3042essential oilsinsecticidal activity<i>Piper aduncum</i><i>Spodoptera frugiperda</i>synergism |
| spellingShingle | Murilo Fazolin Humberto R. Bizzo André F. M. Monteiro Maria E. C. Lima Natália S. Maisforte Paola E. Gama Synergism in Two-Component Insecticides with Dillapiole against Fall Armyworm Plants essential oils insecticidal activity <i>Piper aduncum</i> <i>Spodoptera frugiperda</i> synergism |
| title | Synergism in Two-Component Insecticides with Dillapiole against Fall Armyworm |
| title_full | Synergism in Two-Component Insecticides with Dillapiole against Fall Armyworm |
| title_fullStr | Synergism in Two-Component Insecticides with Dillapiole against Fall Armyworm |
| title_full_unstemmed | Synergism in Two-Component Insecticides with Dillapiole against Fall Armyworm |
| title_short | Synergism in Two-Component Insecticides with Dillapiole against Fall Armyworm |
| title_sort | synergism in two component insecticides with dillapiole against fall armyworm |
| topic | essential oils insecticidal activity <i>Piper aduncum</i> <i>Spodoptera frugiperda</i> synergism |
| url | https://www.mdpi.com/2223-7747/12/17/3042 |
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