02306nas a2200265 4500008004100000022001400041245018200055210006900237260008000306300001200386490000700398520125200405653001801657653002201675653003301697653002301730653002401753100002501777700002201802700002101824700002501845700002301870700002101893856012601914 2013 eng d a1612-475800aLavandula gibsoni and plectranthus mollis essential oils: chemical analysis and insect control activities against aedes aegypti, anopheles sfttephensi and culex quinquefasciatus0 aLavandula gibsoni and plectranthus mollis essential oils chemica aTIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANYbSPRINGER HEIDELBERGcDEC a713-7180 v863 a

Essential oils and acetone extracts from Lavandula gibsoni and Plectranthus mollis, family Lamiaceae, were investigated for their mosquito larvicidal activity against 4th instar larvae of Aedes aegypti, Anopheles stephensi and Culex quinquefasciatus. LC50 values against these three species were 48.3, 62.8 and 54.7 mg/L for L. gibsoni essential oil and 118.5, 137.2 and 128.1 mg/L, respectively, for its acetone extract, while LC50 values for P. mollis essential oil were 25.4, 33.5 and 29.5 mg/L and 195.0, 213.8 and 209.0 mg/L, respectively, for its acetone extract. Repellence of the essential oils was assessed against A. aegypti adults. L. gibsoni essential oil provided 100 % protection for more than 7 h at a concentration of 2.0 mg/cm(2). Under the same conditions, the standard repellent N,N-diethyl-meta-toluamide, at 0.25 mg/cm(2), provided 100 % protection for more than 8 h, while P. mollis essential oil was only weakly repellent. The major components from both essential oils were identified based on GC-MS analysis and linear retention indices. Our results demonstrated promising larvicidal activities of both essential oils against these mosquito species. L. gibsoni essential oil also showed promising repellent activity.

10aEssential oil10aLavandula gibsoni10aMosquito larvicidal activity10aMosquito repellent10aPlectranthus mollis1 aKulkarni, Roshan, R.1 aPawar, Pushpa, V.1 aJoseph, Mary, P.1 aAkulwad, Ambadas, K.1 aSen, Avalokiteswar1 aJoshi, Swati, P. uhttp://library.ncl.res.in/content/lavandula-gibsoni-and-plectranthus-mollis-essential-oils-chemical-analysis-and-insect-002526nas a2200241 4500008004100000022001400041245014400055210006900199260000800268300001200276490000700288520167700295653001901972653001401991653001802005653002602023653001102049653002802060100002202088700002602110700002002136856012802156 2022 eng d a1568-776700aGlance at the chemodiversity of Ocimum species: Trends, implications, and strategies for the quality and yield improvement of essential oil0 aGlance at the chemodiversity of Ocimum species Trends implicatio cJUN a879-9130 v213 a

Ocimum species represent commercially important medicinal and aromatic plants. The essential oil biosynthesized by Ocimum species is enriched with specialized metabolites specifically, terpenoids and phenylpropanoids. Interestingly, various Ocimum species are known to exhibit diverse chemical profiles, and this chemical diversity has been at the center of many studies to identify commercially important chemotypes. Here, we present various chemotypes from the Ocimum species and emphasize trends, implications, and strategies for the quality and yield improvement of essential oil. Globally, many Ocimum species have been analyzed for their essential oil composition in over 50 countries. Asia represents the highest number of chemotypes, followed by Africa, South America, and Europe. Ocimum basilicum L. has been the most widespread and well-studied species, followed by O. gratissimum L., O. tenuiflorum L., O. canum Sims, O. americanum and O. kilimandscharicum Gurke. Moreover, various molecular reasons, benefits, adverse health effects and mechanisms behind this vast chemodiversity have been discussed. Different strategies of plant breeding, metabolic engineering, transgenic, and tissue-culture, along with anatomical modifications, are surveyed to enhance specific chemotypic profiles and essential oil yield in numerous Ocimum species. Consequently, chemical characterization of the essential oil obtained from Ocimum species has become indispensable for its proper utilization. The present chemodiversity knowledge from Ocimum species will help to exploit various applications in the industrial, agriculture, biopharmaceutical, and food sectors.

10aChemodiversity10aChemotype10aEssential oil10aMetabolic engineering10aOcimum10aSpecialized metabolites1 aGurav, Tanuja, P.1 aDholakia, Bhushan, B.1 aGiri, Ashok, P. uhttp://library.ncl.res.in/content/glance-chemodiversity-ocimum-species-trends-implications-and-strategies-quality-and-yield02615nas a2200265 4500008004100000022001400041245019700055210006900252260000800321300001100329490000700340520163800347653002401985653002302009653001802032653002302050653002202073100002002095700002302115700001402138700002202152700002302174700002302197856012902220 2022 eng d a2212-429200aInsights on biorational potential of Ocimum gratissimum essential oil and its binary combination with monoterpene phenol for control of rice weevil (Sitophilus oryzae) and aflatoxigenic fungi.0 aInsights on biorational potential of Ocimum gratissimum essentia cDEC a1020190 v503 a

Food grain storage is a difficult task due to insect infestation and subsequent mycotoxin contaminations which adversely affects the nutritional quality of grains and leading to economic loss. Current research focuses on contact and fumigant toxicity effects of essential oils (EO) and aroma compounds against Sitophilus oryzae and growth inhibition of aflatoxigenic fungi. The EO of Ocimum gratissimum comprised of thymol (46.8%), gamma-terpi-nene (14.04%) along with o-cymene (11.76%). Also, Cymbopogon flexuosus rich in citral (76.3%) and geraniol (84.6%) and Cymbopogon nardus having geraniol (49.24%) and geranyl acetate (20.9%) were all evaluated using a dose of 25 mu L (Conc-833.3 mu L/L air) against S. oryzae. All the compounds showed significant mortality (>95%) at 24 h of exposure. The insecticidal property of O. gratissimum oil chemotype showed a strong contact and fumigant toxicity against S. oryzae at a highest dose of 25 mu L (Conc-833.3 mu L/L air) within 24 h. It has been further evaluated on three aflatoxigenic fungal strains which showed reduction in growth and aflatoxin content (Aflatoxin B and G), which was markedly reduced upon the treatment. The binary mixture interaction of O. gratissimum oil with monoterpene phenol (carvacrol) was assessed and the specific binary mixture of 80:20 ratio (having additive property) acts as a contact insecticide with 100% mortality. Hence, essential oil of less explored Ocimum species (O. gratissimum) and its binary mixture could be deployed as potential biorational for control of rice weevil (Sitophilus oryzae) and aflatoxigenic Aspergillus spp.

10aAflatoxigenic fungi10aBinary combination10aEssential oil10aOcimum gratissimum10aSitophilus oryzae1 aRemesh, Archana1 aRaveendran, Ashika1 aBincy, K.1 aWagh, Vasudev, S.1 aDastager, Syed, G.1 aBabu, C., S. Vivek uhttp://library.ncl.res.in/content/insights-biorational-potential-ocimum-gratissimum-essential-oil-and-its-binary-combination