Insecticidal Activity of the Essential Oil and Extracts of Gutierrezia mandonii and G. repens (Asteraceae) Growing in Argentina

The thrips, Frankliniella schultzei, and green peach aphid, Myzus persicae, cause direct damage to plants of economic importance and transmit phytoviruses, causing large economic losses. Chemical constituents of essential oils present a wide range of biological activities. The aim of this work was to evaluate insecticidal activity of essential oil from citronella grass, Cymbopogon winterianus, on F. schultzei and M. persicae. This essential oil was obtained by steam distillation and components were identified by GC/FID and GC/MS. A Potter spray tower was used to spray insects with the essential oil. The major constituents are geraniol (28.62%), citronellal (23.62%) and citronellol (17.10%). Essential oil of C. winterianus at 1% (w v-1) causes mortality in F. schultzei and M. persicae at 34.3% and 96.9%, respectively. The LC50 value for M. persicae was 0.36% and LC90 0.66%. Thus, citronella grass essential oil at 1% (w v-1) is more toxic to M. persicae than F. schultzei. This essential oil shows promise for developing pesticides to manage M. persicae.

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Insecticidal and repellent activity of the essential oil of Cinnamomum camphora var. linaloolifera Y. Fujita (Ho-Sho) and Cinnamomum camphora (L.) J Presl. var. hosyo (Hon-Sho) on Sitophilus zeamaisMots. (Coleoptera, Curculionedae)

Revista Brasileira de Plantas Medicinais ◽

10.1590/1983-084x/14_074 ◽

2015 ◽

Vol 17 (4 suppl 1) ◽

pp. 769-773 ◽

Cited By ~ 4

Author(s):

R.L. CANSIAN ◽

V. ASTOLFI ◽

R.I. CARDOSO ◽

N. PAROUL ◽

S.S. ROMAN ◽

...

Keyword(s):

Essential Oil ◽

Essential Oils ◽

Insecticidal Activity ◽

Sitophilus Zeamais ◽

Repellent Activity ◽

Cinnamomum Camphora ◽

Preference Index ◽

Lethal Doses ◽

Repellency Activity

ABSTRACT The aim of this work was to evaluate the insecticidal and repellency activity of the essential oil of Cinnamomum camphora var. linaloolifera Y. Fujita (Ho-Sho) and Cinnamomumcamphora (L.) J Presl.var. hosyo (Hon-Sho), against the Sitophilus zeamais in maize grains. The essential oils were obtained by hydrodistillation and analyzed by GC-MS.The insecticidal activity was determined by the toxicity of different concentrations of essential oils during 24 hours of contact with the insects, in the absence of feed substrate. The Bioassays of repellency were conducted with lethal doses (LD50,LD25,and LD12.5) obtained from insecticidal bioassay. In order to compare the treatments the preference index (PI) was employed. The analysis of the essential oils of Cinnamomum camphora leaves indicated 68% of camphor and 9% of linalool for the variation Hon-Sho and 95% of linalool to the variation Ho-Sho. The variation Ho-Sho presented greatest insecticidal activity than the variation Hon-Sho against the Sitophiluszeamais, with LD50 of 0.35 μL/cm2, whereas in the variation Hon-Sho the ratewas 0.48 μL/cm2. However, considering only the concentrations of linalool and camphor of Ho-Sho and Hon-Sho, the lethal doses’ evaluation of these compounds were similar. The values of the preference index ranged from -0.3 to -0.8 for thevariation Ho-Sho and -0.2 to -0.7 for the variation Hon-Sho. The essential oils evaluated in this work showed repellent activity against Sitophiluszeamais in vitro and in trials performed in mini-silos.

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Chemistry and insecticidal potential of bay leaf essential oil against stored grain pest of wheat

Journal of Applied and Natural Science ◽

10.31018/jans.v8i4.1085 ◽

2016 ◽

Vol 8 (4) ◽

pp. 2049-2054 ◽

Cited By ~ 2

Author(s):

K. K. Chahal ◽

Ritima Bansal ◽

Ramandeep Kaur

Keyword(s):

Essential Oil ◽

Column Chromatography ◽

Insecticidal Activity ◽

Polar Fraction ◽

Spectroscopic Techniques ◽

Stored Grain ◽

Maximum Inhibition ◽

Leaf Oil ◽

Leaf Essential Oil ◽

Stored Grain Pest

A laboratory experiment was conducted to study chemistry and insecticidal activity of bay leaf oil, its fractions and isolated compounds against stored grain pest of wheat i.e.Tribolium castaneum Herbst. Bay leaf essential oil extracted from dried and powdered bay leaves was subjected to column chromatography to have its fractions. Extensive column chromatography of polar fraction yielded Eugenol and 7, 7 Dimethyl-3-methylene bicyclo [2.2.1] heptan-4-ol which were identified by spectroscopic techniques. Bay leaf oil was tested for its insecticidal activity at five different concentrations in the range 4-12 mg g-1respectively against F1 generation of red rust flour beetle adults. Maximum inhibition was observed at 12 mg g-1concentration. The activity was both time and concentration dependent. The fractions of bay leaf essential oil and the compounds isolated were tested at 4mg g-1 concentration. Polar fraction was found to be more active as compared to nonpolar fraction as 100 and 53.1% mortality was obtained on 30th day for polar and nonpolar fractions, respectively. Comparison of eugenol and 7, 7 Dimethyl-3-methylene bicyclo [2.2.1] heptan-4-ol showed complete mortality on 33rd and 35thday respectively , which revealed that adults of T. castaneum were more susceptible to eugenol.The results indicated that bay leaf essential oil may have potential to control stored grain pest, T. castaneum.

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Pimpinella anisum essential oil nanoemulsions against Tribolium castaneum—insecticidal activity and mode of action

Environmental Science and Pollution Research ◽

10.1007/s11356-018-2068-1 ◽

2018 ◽

Vol 25 (19) ◽

pp. 18802-18812 ◽

Cited By ~ 49

Author(s):

Ahmed S. Hashem ◽

Samir S. Awadalla ◽

Gamal M. Zayed ◽

Filippo Maggi ◽

Giovanni Benelli

Keyword(s):

Essential Oil ◽

Tribolium Castaneum ◽

Insecticidal Activity ◽

Mode Of Action ◽

Pimpinella Anisum

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Toxicity of Cymbopogon flexuosus essential oil and citral for Spodoptera frugiperda

Ciência e Agrotecnologia ◽

10.1590/1413-70542018424013918 ◽

2018 ◽

Vol 42 (4) ◽

pp. 408-419 ◽

Cited By ~ 3

Author(s):

Ellison Rosario de Oliveira ◽

Dejane Santos Alves ◽

Geraldo Andrade Carvalho ◽

Bárbara Maria Ribeiro Guimarães de Oliveira ◽

Smail Aazza ◽

...

Keyword(s):

Essential Oil ◽

Insecticidal Activity ◽

Spodoptera Frugiperda ◽

Fall Armyworm ◽

Positive Control ◽

Gas Chromatography Mass Spectrometry ◽

Cymbopogon Flexuosus ◽

Ic50 Values ◽

Lethal Time ◽

Polyphagous Insect

ABSTRACT Fall armyworm (FAW) (Spodoptera frugiperda) is a polyphagous insect responsible for damage to several crops. Synthetic chemical insecticides and genetically modified plants are the most commonly used methods for FAW control. However, the selection of resistant populations has been reported in several studies, justifying the search for new molecules to be used in the control of S. frugiperda. The aim of the present study was to evaluate the toxicity of lemongrass (Cymbopogon flexuosus) essential oil (LEO) and its major component (citral) in relation to FAW. Additionally, the anticholinesterase activity of LEO and citral was evaluated using acetylcholinesterase (AChE) from Electrophorus electricus. The LEO was toxic to FAW when added to an artificial diet (LC50 = 1.35 mg mL-1) at the highest concentrations tested, and the median lethal time (LT50) was 18.85 h. Major components of LEO were identified by gas chromatography-mass spectrometry, and citral, the most abundant component, was used in FAW bioassays. The insecticidal activity of citral was statistically similar to that of LEO, demonstrating that citral was responsible for the insecticidal activity of LEO. Inhibition of AChE was measured, and the mean inhibitory concentration (IC50) values for LEO and citral were 650- and 405-fold higher, respectively, than that verified for the positive control (methomyl insecticide), suggesting selectivity for non-target organisms. Based on these results, citral and C. flexuosus have the potential to be applied in the development of new products for the control of S. frugiperda.

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