Chemical examination of <i>Swertia densifolia</i> leaf essential oil and its repellent activity towards <i>Apis cerana indica</i> F.

Naik, D. G.; Dandge, Chitra; Puntambekar, Hemalata M.; Deshpande, Pradnya

doi:10.1080/00218839.2008.11101425

Cited by 4 publications

(9 citation statements)

References 10 publications

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“…1 clearly indicates the repellent nature of formulations of the essential oil of T. chebula fruits towards the Indian honeybee A. florea. A repellent activity of essential oils towards honeybees was already observed earlier [4] [15 -18], which supports the present findings.…”

supporting

confidence: 95%

“…Seven formulations of increasing concentrations of essential oil were prepared by mixing the weighed quantity of oil (5 -80 mg) with 1 ml of liquid paraffin. The formulation for the bioassay was selected randomly, and the bioassay with each of the test formulations was carried out on the campus of ARI using the rotating-table bioassay as described previously [4]. Briefly, a table with rotating circular wooden top (diameter, 60 cm), mounted on an electric motor and equipped with a removable glass top of the same size on the wooden top, was used.…”

Section: Experimental Partmentioning

confidence: 99%

“…The oil showed repellent properties. Its chemical constitution, unknown till then, was also established [4].Terminalia chebula Retz. (Combretaceae) is a widely occurring medicinal plant in Asia, growing in deciduous forests in areas of light rainfall.…”

mentioning

confidence: 99%

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Essential Oil of Terminalia chebula Fruits as a Repellent for the Indian Honeybee Apis florea

Naik

Puntambekar

Anantpure

2010

Chemistry & Biodiversity

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Plant-based repellent formulations for honeybees play an important role in the bee management. For this purpose, the essential oil of an Indian medicinal plant, Terminalia chebula, commonly known as Myrobalan, was isolated for the first time. Hitherto unknown chemical constituents of the essential oil were determined by GC/MS. The repellent activity of formulations of the essential oil, tested towards the Indian honeybee Apis florea, was found to be dose dependent. The repellency (DeltaR) increased with the concentration of essential oil in the formulations, reaching a maximum for the formulation containing 50 mg/ml of oil. A further increase in the oil concentration was found to reduce the DeltaR. The screening of formulations of the major essential-oil components identified indicated that formulations of furfural, 5-methylfurfural, tetradecanoic acid, palmitic acid, and oleic acid elicited no response in honeybees. In contrast, the formulations of phenylacetaldehyde were repellent, while those of ethyl cinnamate were attractant. These findings might be an asset for beekeepers to improve the bee management. Attractant formulations are effective to attract bees to the desired areas, thus improving the efficiency of pollination. Repellent formulations are used to repel honeybees, especially when toxic insecticides are sprayed on the fields.

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supporting

confidence: 95%

Section: Experimental Partmentioning

confidence: 99%

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Essential Oil of Terminalia chebula Fruits as a Repellent for the Indian Honeybee Apis florea

Naik

Puntambekar

Anantpure

2010

Chemistry & Biodiversity

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“…Bioassays of one of the major compound linalool and one of the intermediate compound a-terpeniol was already carried out by us (Naik et al 2008). Bioassays of the remaining major compound octadecanoic acid and the intermediate compounds nerol, n-octadecyl acetate, and spirostan-3-ol toward A. florea were carried out in this study.…”

Section: Methodsmentioning

confidence: 97%

“…Initially, a dose-dependent attractant and repellent activity of a leaf extract of this plant toward A. florea (Hymenoptera: Apidae) was demonstrated (Naik et al 2005). This was followed by the isolation of the essential oil from leaves and demonstration of its repellency to A. florea (Naik et al 2008). Study of the biological properties of extracts of the leaf left after removal of the essential oil demonstrated dose-dependent attractant properties at lower concentrations and repellent properties at higher concentrations, a response pattern similar to that shown by insects to pheromones (Naik et al 2010a).…”

Section: Introductionmentioning

confidence: 99%

Potential Use of an Essential Oil From the Flower of Swertia densifolia as a Repellent for Apis florea (Hymenoptera: Apidae)

Naik¹,

Vaidya-Kannur²,

Deshpande³

et al. 2015

Annals of the Entomological Society of America

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Formulations of compounds repellent to honey bees may be useful tools to keep bees away from areas recently treated with toxic insecticides. Here, we report the activity of a previously unknown honey bee repellent, an essential oil from the flower of Swertia densifolia (Gentianaceae), which has activity toward Indian honey bees Apis florea F. The essential oil was obtained by hydrodistillation and was subjected to a rotating table bioassay with foragers of the honey bee A. florea. Repellency was dose-dependent up to 12 mg/ml and remained constant thereafter. The chemical constitution of the essential oil was examined by gas chromatography-mass spectrometry analyses, which identified 19 constituent compounds. The major constituents (>10% of the oil) were linalool and octadecanoic acid. The constituents of intermediate concentration (5-10%) were a-terpeniol, nerol, n-octadecyl acetate, and spirostan-3-ol. Besides these, five minor constituents (1-5%) and six of the eight trace components present (<1%) have also been identified. The response of A. florea foragers to mixtures of the major and intermediate constituents was studied. Screening of formulations of linalool and a-terpeniol showed repellent properties toward A. florea, behavior which has already been reported by us in earlier studies. The compound n-octadecyl acetate was found to be an attractant, while octadecanoic acid and spirostan-3-ol were neither attractants nor repellents. Nerol, however, elicited dose-dependent effects involving both attraction and repellency. The effects of the constituents of this essential oil were not merely additive, possibly due to synergistic effects. These results establish the previously unknown chemical constitution and dose-dependent repellent nature of the essential oil isolated from flower of S. densifolia toward A. florea and may be used to improve bee management.

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Essential Oil and Its Bioactivity Toward Honeybees

Deshpande¹,

Naik²

2022

Encyclopedia of Green Materials

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Chemical examination of Swertia densifolia leaf essential oil and its repellent activity towards Apis cerana indica F.

Cited by 4 publications

References 10 publications

Essential Oil of Terminalia chebula Fruits as a Repellent for the Indian Honeybee Apis florea

Essential Oil of Terminalia chebula Fruits as a Repellent for the Indian Honeybee Apis florea

Potential Use of an Essential Oil From the Flower of Swertia densifolia as a Repellent for Apis florea (Hymenoptera: Apidae)

Essential Oil and Its Bioactivity Toward Honeybees

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