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Roman Pavela - One of the best experts on this subject based on the ideXlab platform.
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The Effects of Pimpinella anisum Essential Oils on Young Larvae Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae)
American Journal of Potato Research, 2017Co-Authors: Jiři Skuhrovec, Matěj Božik, Pavel Klouček, Ondřej Douda, Roman Pavela, Miloslav ZouharAbstract:The effect of essential oil (EO) from anise (Pimpinellia anisum) on the mortality of young larvae of Colorado potato beetles has been studied. In our bioassays, P. anisum EO significantly increased the mortality of the second instar larvae of L. decemlineata. Significantly different values of LD50 and LD90 were established for acute (LD50 = 1.76, and LD90 = 8.29) as well as chronic toxicity (LD50 = 0.45, and LD90 = 1.01). Decrease of both values over experimental period was evident, which showed that the larval mortality was slow and cumulative. The composition of EO used for biological experiments was also assessed. The main component detected in EO from P. anisum was anethole (79.87%), followed by anisaldehyde (7.74%), estragole (5.88%) and β-linalool (1.07%). Within five days, residual concentration of EO decreased from 3.87 mg/g of dry weight immediately after foliar applications to 0.9 mg per g of dry weight. The effect of this slow evaporation could be explained by dominant presence of anethole or by the type of formulation and the addition of oil and tween. Results of our study demonstrate that EO from P. anisum has insecticidal properties that may lead to the development of new organic products for the control of Colorado potato beetles.ResumenSe estudió el efecto del aceite esencial (EO) del anis (Pimpinellia anisum) en la mortalidad de larvas jóvenes del escarabajo de Colorado. En nuestros bioensayos, el EO de P. anisum incrementó significativamente la mortalidad de las larvas de segundo instar de L. decemlineata. Se establecieron valores significativamente diferentes de LD50 y LD90 para toxicidad aguda (LD50 = 1.76 y LD90 = 8.29), así como para toxicidad crónica (LD50 = 0.45 y LD90 = 1.01). La disminución de ambos valores sobre el período experimental fue evidente, lo que mostró que la mortalidad de las larvas fue lenta y acumulativa. También se analizó la composición del EO usado para los experimentos biológicos. El principal componente detectado en EO de P. anisum fue anelthol (79.87%), seguido de anisaldehido (7.74%), estragol (5.88%) y β-linalool (1.07%). En cinco días, la concentración residual de EO disminuyó de 3.87 mg/g de peso seco inmediatamente después de las aplicaciones foliares, a 0.9 mg por g de peso seco. El efecto de esta lenta evaporación pudiera explicarse por la presencia dominante de anelthol o por el tipo de formulación y la adición de aceite y tween. Los resultados de nuestro estudio demuestran que el EO de P. anisum tiene propiedades insecticidas que pudieran conducir al desarrollo de nuevos productos orgánicos para el control del escarabajo de Colorado.
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The Effects of Pimpinella anisum Essential Oils on Young Larvae Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae)
American Journal of Potato Research, 2017Co-Authors: Jiři Skuhrovec, Matěj Božik, Pavel Klouček, Ondřej Douda, Roman Pavela, Miloslav ZouharAbstract:Se estudió el efecto del aceite esencial (EO) del anis ( Pimpinellia anisum ) en la mortalidad de larvas jóvenes del escarabajo de Colorado. En nuestros bioensayos, el EO de P. anisum incrementó significativamente la mortalidad de las larvas de segundo instar de L. decemlineata . Se establecieron valores significativamente diferentes de LD50 y LD90 para toxicidad aguda (LD50 = 1.76 y LD90 = 8.29), así como para toxicidad crónica (LD50 = 0.45 y LD90 = 1.01). La disminución de ambos valores sobre el período experimental fue evidente, lo que mostró que la mortalidad de las larvas fue lenta y acumulativa. También se analizó la composición del EO usado para los experimentos biológicos. El principal componente detectado en EO de P. anisum fue anelthol (79.87%), seguido de anisaldehido (7.74%), estragol (5.88%) y β-linalool (1.07%). En cinco días, la concentración residual de EO disminuyó de 3.87 mg/g de peso seco inmediatamente después de las aplicaciones foliares, a 0.9 mg por g de peso seco. El efecto de esta lenta evaporación pudiera explicarse por la presencia dominante de anelthol o por el tipo de formulación y la adición de aceite y tween. Los resultados de nuestro estudio demuestran que el EO de P. anisum tiene propiedades insecticidas que pudieran conducir al desarrollo de nuevos productos orgánicos para el control del escarabajo de Colorado. The effect of essential oil (EO) from anise ( Pimpinellia anisum ) on the mortality of young larvae of Colorado potato beetles has been studied. In our bioassays, P. anisum EO significantly increased the mortality of the second instar larvae of L. decemlineata . Significantly different values of LD_50 and LD_90 were established for acute (LD_50 = 1.76, and LD_90 = 8.29) as well as chronic toxicity (LD_50 = 0.45, and LD_90 = 1.01). Decrease of both values over experimental period was evident, which showed that the larval mortality was slow and cumulative. The composition of EO used for biological experiments was also assessed. The main component detected in EO from P. anisum was anethole (79.87%), followed by anisaldehyde (7.74%), estragole (5.88%) and β-linalool (1.07%). Within five days, residual concentration of EO decreased from 3.87 mg/g of dry weight immediately after foliar applications to 0.9 mg per g of dry weight. The effect of this slow evaporation could be explained by dominant presence of anethole or by the type of formulation and the addition of oil and tween. Results of our study demonstrate that EO from P. anisum has insecticidal properties that may lead to the development of new organic products for the control of Colorado potato beetles.
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The effects of Pimpinella anisum essential oils on young larvae Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae).
American Journal of Potato Research, 2016Co-Authors: Jiři Skuhrovec, Matěj Božik, Pavel Klouček, Ondřej Douda, Roman Pavela, Miloslav ZouharAbstract:The effect of essential oil (EO) from anise (Pimpinellia anisum) on the mortality of young larvae of Colorado potato beetles has been studied. In our bioassays, P. anisum EO significantly increased the mortality of the second instar larvae of L. decemlineata. Significantly different values of LD50 and LD90 were established for acute (LD50 = 1.76, and LD90 = 8.29) as well as chronic toxicity (LD50 = 0.45, and LD90 = 1.01). Decrease of both values over experimental period was evident, which showed that the larval mortality was slow and cumulative. The composition of EO used for biological experiments was also assessed. The main component detected in EO from P. anisum was anethole (79.87%), followed by anisaldehyde (7.74%), estragole (5.88%) and β-linalool (1.07%). Within five days, residual concentration of EO decreased from 3.87 mg/g of dry weight immediately after foliar applications to 0.9 mg per g of dry weight. The effect of this slow evaporation could be explained by dominant presence of anethole or by the type of formulation and the addition of oil and tween. Results of our study demonstrate that EO from P. anisum has insecticidal properties that may lead to the development of new organic products for the control of Colorado potato beetles.
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acute toxicity and synergistic and antagonistic effects of the aromatic compounds of some essential oils against culex quinquefasciatus say larvae
Parasitology Research, 2015Co-Authors: Roman PavelaAbstract:The efficacy of 30 aromatic compounds and their mutual binary combinations was assessed for acute toxicity against the larvae Culex quinquefasciatus. Based on comparison of the lethal doses, thymol and p-cymene were selected as the most effective (LD50 = 18 and 21 mg L−1, respectively, and LD90 = 25 and 30 mg L−1, respectively). Although the LD50 for terpinolene and trans-anethole was also estimated at 21 mg L−1, their LD90 was significantly higher compared to the substances above (245 and 34 mg L−1, respectively). In total, 435 binary combinations were tested, of which 249 combinations showed a significant synergistic effect, while 74 combinations showed a significant antagonistic effect on mortality. Only nine substances were identified as being able to create a synergistic effect with more than 20 substances: limonene, trans-anethole, 4-allylanisole, carvacrol, isoeugenol, menthone, carvone, borneol, and camphor. The highest synergistic effect on larval mortality was achieved for the combinations: eugenol and isoeugenol, carvone and carvacrol, carvone and 4-allylanisole, carvone and α-terpineol, carvone and menthone, limonene and trans-anethole, limonene and menthone, α-pinene and menthone, β-citronellol and menthone, carvacrol and 4-allylanisole, carvacrol and terpineol, α-terpinene and trans-anethole, camphor and menthone, camphene and menthone, and 4-allylanisole and menthone. Significant differences between achieved mortality and the mutual mixing ratio were found for the five selected binary mixtures that had shown the most significant synergistic effect in the previous tests. The mixture of limonene and trans-anethole showed the highest mortality, with the mixing ratio 1:1; the mixture of eugenol and isoeugenol caused 90.2 % mortality, with the mixing ratio 1:3. One hundred percent mortality was achieved if carvacrol was contained in a mixture with carvone in a ratio >2. After a comparison of all our results, based on our experiments, we can choose two pairs that caused mortality higher than 90 % in concentrations lower than 20 mg L−1: limonene and trans-anethole (with the mixing ratio 1:1), and carvone and carvacrol (with the mixing ratio 1:2–3). The information gained can thus be used in the development of new botanical insecticides based on essential oils (EOs) and particularly in the creation of formulations.
Luis Carlos Martínez - One of the best experts on this subject based on the ideXlab platform.
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acute toxicity and sublethal effects of lemongrass essential oil and their components against the granary weevil sitophilus granarius
Insects, 2020Co-Authors: Angelica Platarueda, José Cola Zanuncio, José Eduardo Serrão, Gabriela Da Silva Rolim, Carlos Frederico Wilcken, Luis Carlos MartínezAbstract: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 µg·insect–1), citral (LD50 = 6.92 µg·insect–1), and geranyl acetate (LD50 = 3.93 µg·insect–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.
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Chlorantraniliprole-mediated Effects on Survival, Walking Abilities, and Respiration in the Coffee Berry Borer, Hypothenemus Hampei
Ecotoxicology and environmental safety, 2019Co-Authors: Angelica Plata-rueda, Luis Carlos Martínez, Nayara Cecília Rodrigues Costa, José Cola Zanuncio, Maria Elisa De Sena Fernandes, José Eduardo Serrão, Raul Narciso C. Guedes, Flávio Lemes FernandesAbstract:Abstract Hypothenemus hampei Ferrari (Coleoptera: Curculionidae) is the main pest of coffee crops, and effective methods for pest management are needed urgently. Bioassays were conducted to assess the effects of the insecticide chlorantraniliprole on H. hampei adults. Toxicity, survivorship, larval production, respiration rate, and behavioral responses to six concentrations of chlorantraniliprole were evaluated. Chlorantraniliprole was toxic to H. hampei (LD50 = 0.49 mg mL−1 and LD90 = 1.21 mg mL−1). Survivorship was 98% in adults not exposed to chlorantraniliprole, decreasing to 52% in insects exposed to LD50 and 2% in insects treated with LD90. H. hampei showed reduced mobility on insecticide-treated surfaces. The insecticide promoted a decrease in the respiration rate of H. hampei for up to 3 h after exposure, altering behavioral responses and locomotor activity. Chlorantraniliprole was shown to have lethal and sublethal effects on H. hampei and, thus, can be used rotationally in integrated pest management programs to control of this pest in coffee crops and retard of insect resistance.
Vishnu A Kirthi - One of the best experts on this subject based on the ideXlab platform.
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efficacy of medicinal plant extracts against formosan subterranean termite coptotermes formosanus
Industrial Crops and Products, 2012Co-Authors: Gandhi Elango, Abdul Abdul Rahuman, Chinnaperumal Kamaraj, Asokan Bagavan, Abduz A Zahir, Thirunavukkarasu Santhoshkumar, Sampath Marimuthu, Kanayairam Velayutham, Chidambaram Jayaseelan, Vishnu A KirthiAbstract:Abstract The Formosan subterranean termite, Coptotermes formosanus Shiraki, is among the most devastating termite pests. Natural products derived from plant extracts were tested in a discovery programme for effective, environment friendly termite control agents. Screening for anti-termitic activity of plant extracts with some known medicinal attributes could lead to the discovery of new agents for termite control. The aim of this study was to investigate the anti-termitic activity of crude leaf hexane, ethyl acetate, acetone and methanol extracts of Andrographis lineata Wallich ex Nees. (Acanthaceae), Andrographis paniculata (Burm.f.) Wall. ex Nees. (Acanthaceae), Argemone mexicana L. (Papaveraceae), Aristolochia bracteolata Lam. (Aristolochiaceae), Datura metel L. (Solanaceae), Eclipta prostrata L. (Asteraceae), Sesbania grandiflora (L.) Pers. (Fibaceae) and Tagetes erecta L. (Compositae) against C. formosanus. An impregnated filter paper no-choice bioassay method was followed. All the crude extracts showed anti-termitic activity in a dose-dependent manner and exhibited a significant activity after 24 h and 48 h of exposure; the highest termite mortality was found in leaf hexane extract of A. bracteolata, ethyl acetate extract of A. paniculata, D. metel, E. prostrata, methanol extract of A. lineata and D. metel after 24 h (LD50 = 363, 371, 298, 292, 358 and 317 ppm; LD90 = 1433, 1659, 1308, 1538, 1703 and 1469 ppm), respectively. The hexane extract of T. erecta, acetone extract of A. mexicana, methanol extract of S. grandiflora and T. erecta showed activity after 48 h (LD50 = 245, 253, 289, 409 ppm; LD90 = 1378, 1511, 1508 and 2425 ppm), respectively. Among the natural products tested, may provide a renewable source of safe natural wood preservatives. These findings corroborate traditional insecticidal application of selected plants and the results can be extended for the control of termites. The primary objective of the present study was to identify novel, natural chemotypes from biologically active crude plant extracts that may be useful as part of termite treatment regimens in their natural form or as synthons for structure–activity studies in the future. The results reported here open the possibility of further investigations of efficacy on their anti-termitic properties of natural product extracts.
Angelica Platarueda - One of the best experts on this subject based on the ideXlab platform.
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acute toxicity and sublethal effects of lemongrass essential oil and their components against the granary weevil sitophilus granarius
Insects, 2020Co-Authors: Angelica Platarueda, José Cola Zanuncio, José Eduardo Serrão, Gabriela Da Silva Rolim, Carlos Frederico Wilcken, Luis Carlos MartínezAbstract: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 µg·insect–1), citral (LD50 = 6.92 µg·insect–1), and geranyl acetate (LD50 = 3.93 µg·insect–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.
Gandhi Elango - One of the best experts on this subject based on the ideXlab platform.
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efficacy of medicinal plant extracts against formosan subterranean termite coptotermes formosanus
Industrial Crops and Products, 2012Co-Authors: Gandhi Elango, Abdul Abdul Rahuman, Chinnaperumal Kamaraj, Asokan Bagavan, Abduz A Zahir, Thirunavukkarasu Santhoshkumar, Sampath Marimuthu, Kanayairam Velayutham, Chidambaram Jayaseelan, Vishnu A KirthiAbstract:Abstract The Formosan subterranean termite, Coptotermes formosanus Shiraki, is among the most devastating termite pests. Natural products derived from plant extracts were tested in a discovery programme for effective, environment friendly termite control agents. Screening for anti-termitic activity of plant extracts with some known medicinal attributes could lead to the discovery of new agents for termite control. The aim of this study was to investigate the anti-termitic activity of crude leaf hexane, ethyl acetate, acetone and methanol extracts of Andrographis lineata Wallich ex Nees. (Acanthaceae), Andrographis paniculata (Burm.f.) Wall. ex Nees. (Acanthaceae), Argemone mexicana L. (Papaveraceae), Aristolochia bracteolata Lam. (Aristolochiaceae), Datura metel L. (Solanaceae), Eclipta prostrata L. (Asteraceae), Sesbania grandiflora (L.) Pers. (Fibaceae) and Tagetes erecta L. (Compositae) against C. formosanus. An impregnated filter paper no-choice bioassay method was followed. All the crude extracts showed anti-termitic activity in a dose-dependent manner and exhibited a significant activity after 24 h and 48 h of exposure; the highest termite mortality was found in leaf hexane extract of A. bracteolata, ethyl acetate extract of A. paniculata, D. metel, E. prostrata, methanol extract of A. lineata and D. metel after 24 h (LD50 = 363, 371, 298, 292, 358 and 317 ppm; LD90 = 1433, 1659, 1308, 1538, 1703 and 1469 ppm), respectively. The hexane extract of T. erecta, acetone extract of A. mexicana, methanol extract of S. grandiflora and T. erecta showed activity after 48 h (LD50 = 245, 253, 289, 409 ppm; LD90 = 1378, 1511, 1508 and 2425 ppm), respectively. Among the natural products tested, may provide a renewable source of safe natural wood preservatives. These findings corroborate traditional insecticidal application of selected plants and the results can be extended for the control of termites. The primary objective of the present study was to identify novel, natural chemotypes from biologically active crude plant extracts that may be useful as part of termite treatment regimens in their natural form or as synthons for structure–activity studies in the future. The results reported here open the possibility of further investigations of efficacy on their anti-termitic properties of natural product extracts.