Phytochemical examination and evaluation of pesticidal activities of Globba sessiliflora Sims (Zingiberaceae) Oleoresins
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Date
2022-08
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G. B. Pant University of Agriculture and Technology, Pantnagar
Abstract
The present study was aimed to analyse the phytochemical nature and to evaluate
pesticidal activities of the oleoresins from aerial part (GSAO) and rhizomes (GSRO) of
Globba sessiliflora Sims. The plant material was collected in the month of July, 2021 from
Kausani, Bageshwar, Uttarakhand. The oleoresins were prepared by cold percolation
method and percent yield obtained were 3.7% and 3.3% for GSAO and GSRO respectively.
Both the oleoresins varied greatly in composition, the major compounds identified in
GSAO were methyl linoleate (18.2 %), methyl palmitate (17.1%), β-pinene (10.5%) and
phytol (10.4%), while the major compounds present in GSRO were γ-sitosterol (22.1 %),
8(17),12-labdadiene-15,16-dial (18.6%), methyl linoleate (4.9%) and methyl palmitate
(4.4%). The different pesticidal activities of oleoresins were performed using standard
protocols. The nematicidal activity tested against Meloidogyne incognita demonstrated
higher mortality in case of GSRO than GSAO. GSRO also showed more inhibition of
hatching of the eggs of Meloidogyne incognita. The oleoresins GSAO and GSRO were also
tested for their insecticidal activity against the insects mustard aphid, Lipaphis erysimi
(second instar nymphs) and castor hairy caterpillar, Selepa celtis (second stage larvae). In
case of mustard aphid, more insecticidal activity was observed for GSRO (LC50=
154.8ppm) than GSAO (LC50= 263.0ppm), while in case of castor hairy caterpillar, more
insecticidal activity was observed for GSAO (LC50= 346.7.0ppm) than GSRO (LC50=
398.1ppm). The herbicidal activity of GSAO and GSRO was assessed against radish seeds
(Raphanus raphanistrum subsp. sativus) for the effects on different growth parameters such
as percent germination, coleoptile length and radical length. Significant herbicidal activity
was shown by both the oleoresins but more effective activity was shown by GSAO
(IC50=166.4ppm) than GSRO (IC50=249.6ppm).