Center for Aromatic Plants Dehradun

Dehradun, India

Center for Aromatic Plants Dehradun

Dehradun, India
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In this study, repellent and fumigant activities of Tanacetum tomentosum and Ta. dolichophyllum essential oils were investigated against Tribolium castaneum. Results showed that both oils had effective fumigant and repellent activities. Tanacetum tomentosum oil emerged as more potent than Ta. dolichophyllum oil with LC50 values of 6.85 and 4.32 μL/0.25 L air after 24 and 48 h of exposure, respectively. Ta. tomentosum oil also showed more repellent activity than Ta. dolichophyllum oil by exhibiting repellent activity in the range of 38.70-82.35%. Chemical analysis of both oils revealed that β-bisabolene (50.0%) was the major component of Ta. tomentosum oil and that β-eudesmol (31.4%) and α-bisabolol (10.7%) were the major components of Ta. dolichophyllum oil. Doses of 40 and 80 μL/0.5 L air of both oils significantly protected 500 g of wheat grains for up to 6 months from insect infestation, without causing any side effects in the germination rates; the order of germination rates was Ta. tomentosum (89.45%) > Ta. dolichophyllum (86.78%). Thus, this study suggests that essential oils from Ta. tomentosum and Ta. dolichophyllum can be used as potential alternative botanical fumigants for controlling Tr. castaneum. © 2017 The Entomological Society of Korea and John Wiley & Sons Australia, Ltd.


Lohani H.,Center for Aromatic Plants Dehradun | Andola H.C.,Center for Aromatic Plants Dehradun | Chauhan N.,Center for Aromatic Plants Dehradun | Bhandari U.,Center for Aromatic Plants Dehradun
Asian Pacific Journal of Tropical Biomedicine | Year: 2012

Objective: To evaluate the variation of Cinnamomum tamala leaf essential oil in respect with months and tree size class. Methods: By fallowing standard laboratory methods using capillary GC-FID and GC-MS. Results: The oil samples were analyzed for two months and two different tree size classes. cinnamaldehyde, was the principal component, was higher in the both months i.e. October and January, highest in 30 cm girth class tree in January month (59.23%) and lowest in 60 cm girth class tree in a month of October (41.90%). Smaller size class tree contained greater amount of cinnamaldehyde as compared to higher size class. Conclusions: Consequences of the present study need to selection of proper, tree size and month for harsh economic potentials of such valuable resources. © 2012 Asian Pacific Tropical Biomedical Magazine.

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