ANTIFEEDANT ACTIVITY OF CERTAIN PLANTS ESSENTIAL OILS AGAINST ARMYWORM, SPODOPTERA LITURA (FAB.) (LEPIDOPTERA: NOCTUIDAE (original) (raw)
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To investigate five different plant essential oils Acorus calamus, Ocimum sanctum, Eucalyptus globules, Rosmarinus officinalis and Cymbopogon citrates tested against ovicidal activity of lepidopteran agricultural field pest Spodoptera litura. Plant essential oil, especially botanical insecticides, are currently studied more and more because of the possibility of their use in plant protection. It has been noticed that the higher concentrations of R. officinalis oil possesses strong ovicidal activity at 1000ppm concentration against S.litura no egg hatchability (100% mortality) was recorded. In the same way, R. officinalis oil showed maximum ovicidal activity followed by Ocimum sanctum (99.84), Acorus calamus (99.83), Cymbopongon citrates (57.58) and Eucalyptus globules (39.09) against selected lepidopteron agricultural pest S.litura. Results of this study show that the selected essential oils may be a potent source of natural ovicidal activity against selected important agricultural lepidopteran field pest S. litura.
The present investigation revealed that the essential oil obtained from Acorus calamus, Ocimum sanctum, Eucalyptus globules, Rosmarinus officinalis and Cymbopogon citrates. They were tested against the ten pairs of gravid moths Spodoptera litura. Among the five oils tested, Cymbopongan citratus oil showed greater performance in terms of oviposition deterrent activity as it is evident from the data. It was observed that C. citratus oil treated surfaces received 2, 23, 42.66 and 56.66 mean number of eggs at 1000, 500, 250 and 125ppm concentrations respectively. These results suggest that selected essential oil have the potential to be used as an ideal eco-friendly approach for the control of agricultural pest population.
In the preliminary screening, 20 plant essential oils have been tested for their antifeedant activity of against three important lepidopteran species such as Spodoptera litura,.Helicoverpa armigera and Achaea janata .Six essential showed remarkable antifeedant activity (more than 50%) against selected pest species. Antifeedant activities of six essential oils have been tested with different concentrations 125, 250,500 and 1000 ppm. The maximum antifeedant activity was observed at 125 ppm concentration of R. officinalis (12.78) S. litura, S. officinalis (9.11) H. armigera and O. sanctum (12.44) A. janata. Furthermore, 250 ppm concentration produced M. spicata (22.47) S. litura, S. officinalis (26.88) H. armigera and O. sanctum (25.45) A. janata. Similarly, 500 ppm concentration recorded M. spicata (69.48) S. litura, O. sanctum (68.55) H. armigera and R. officinalis (71.33) A. janata. The most significant antifeedant activity was observed at 1000 ppm concentration S. officinalis (85.56) S. litura, M. spicata (82.85) H. armigera and M. spicata (90.55) A. janata.
Insecticidal activity of essential oils in controlling fall armyworm, Spodoptera frugiperda
Arquivos do Instituto Biológico, 2019
ABSTRACT: Fall armyworm, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) is one of the main pests in maize crop with developing resistance to chemical products and Bt technology. Therefore, alternative control methods such as essential oils are important steps in the implementation management strategies for this pest. This study aimed to evaluate the efficiency of essential oils (EOs) of Corymbia citriodora, Myrciaria dubia (Myrtaceae), Lippia microphylla (Verbenaceae) and Piper umbelattum (Piperaceae) in controlling S. frugiperda. The OEs were extracted and mortality tests were conducted with topic and volatile applications, in 30 second-instar caterpillars originated from insect rearing and artificial diet. As a control, we conducted tests with distilled water and acetone. EOs that provided mortality rates above 80% were submitted to chemical analysis for constituent identification. The efficient EOs were only those of C. citriodora and L. microphylla. For EO of C. citriodo...
Chilean journal of agricultural research, 2020
The alternative use of plant essential oils as pesticide, repellent and/or antifeedant has been emphasized as an important tool in integrated pest management (IPM), promoted by the growing interest in methods that fulfil requirements of efficiency, safety, selectivity, technically feasible and environmentally safe. The objective of this work was to determine the pesticide potential of essential oils of rosemary pepper (Lippia origanoides Kunth; Verbenaceae), citronella (Cymbopogon winterianus Jowitt; Poaceae) and lemongrass (Cymbopogon citratus [DC.] Stapf; Poaceae) to control fall armyworm (Spodoptera frugiperda [J.E. Smith]; Lepidoptera: Noctuidae). Ovicidal, larvicidal and pupicidal activity was evaluated with five dosages (0.1%, 0.5%, 1.0%, 2.5% and 5.0% v/v) and a negative control (neutral detergent at 5.0% v/v). Unhatched eggs, mortality of caterpillars and non-emerged adults were recorded using ovicidal and pupicidal percentage, and median lethal doses (LD50) to caterpillars. The essential oils showed insecticidal activity on the egg, caterpillar 3 rd instars and pupae stages, highlighting the rapid action and high mortality rates caused by the L. origanoides essential oil, which registered, at lowest dosage, average 97.8% ovicidal activity and 81.3% pupicidal activity; in addition to LD50 on 3 rd instar caterpillars, 0.001% by exposure and 0.033% by topical application. Essential oils of C. citratus and C. winterianus required longer periods to act and caused significant mortality on the three stages, registering LD50 0.008% and 0.159% for exposure, and 1.151% and 1.348% for topical application, respectively. Citronella oil caused behavioral changes in caterpillars, which reflected flight and aggressiveness. Therefore, these three essential oils can be an alternative for management of fall armyworm, with the potential to hinder and reduce its biotic potential.
Journal of Tropical Life Science, 2016
The study aims to determine the chemical compounds, toxicity, and antifeedant activity of sweet flag (Acorus calamus) essential oils against third instar larvae of Spodoptera litura. The study was conducted using a completely randomized design (CRD) using various concentration of the essential oils (10 3 , 2 × 10 3 , 3 × 10 3 , 4 × 10 3 , 5 × 10 3 ppm). Mortality and antifeedant activity was observed 24 hours after treatment. Toxicity and antifeedant activity values were 92.5% and 79.3%, respectively, with an LC 50 value 586.96 ppm. Gas chromatography-mass spectrometry analysis showed that essential oil of A. calamus consists of five chemical compounds: methyl isoeugenol, 3.9-decadien-ol-1,3-methyl-6-(1-methylethenyl), 4-pentyl-1-(4propylcyclohexyl)1cyclohexene, γ-asarone and β asarone.
Journal of entomology and zoology studies, 2020
The present study was aimed to evaluate the antifeedant activity of essential herbal oils viz. Karanj (Pongamia glabra) oil @ 2%, Neem (Azadirachta indica) oil @ 2%, Sesame (Sesamum inidicum) oil @ 2% against the Spodoptera litura (Fab.) larva under laboratory conditions using ‘No choice’ feeding bioassay technique. The result shows that all the herbal oils used in the present investigation caused reduction in feeding over control. But the maximum antifeedant activity (i.e. 61.51%) against S. litura was exerted by karanj oil @ 2% and maximum (i.e. 44.86%) feeding inhibition was observed in karanj oil @ 2%, it was followed by neem oil @ 2% (32.74%) and sesame oil @ 2% (10.45%). Experiment concludes that these herbal oils have good antifeedant activity against S. litura that can be used in pest management.
Journal of Plant Protection Research, 2013
Medicinal plant species were tested for their fumigant activity against Spodoptera littoralis third instar larvae. Responses varied according to plant species and parts used. For the present investigation, volatile oils were obtained from: Foeniculum vulgare (flowers and seeds), Coriandrum sativum (seeds), Daucus carota (flowers), Pelargonium graveolens (leaves and flowers), Origanum majorana (leaves and flowers), and Salvia officinalis (leaves). Fumigant activity was observed after 24 hours of exposure. All essential oils were proved to be toxic to the third instar larvae. However, the highest mortality was observed in the essential oil of S. officinalis leaves, C. sativum seeds, F. vulgare seeds, D. carota flowers, and O. majorana leaves with LC50 = 23.050 μl/l air, 68.925 μl/l air, 95.075 μl/l air, 99.300 μl/l air, and 100.925 μl/l air, respectively. Other oils showed an LC50 between 101 and 183 μl/l air.