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VOL. 10, ISSUE 4 (2025)
Toxicological, chemical profiling, biochemical, and histological impacts of some selected essential oils against Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)
Authors
Mohamed E Mostafa, Nabil M Ghanim, Wessam Z Aziz, Hanan Alfy
Abstract
The toxicity of four plant-derived essential
oils extracted from Boswellia Carterii Birdw., Melissa officinalis
L, Valeriana officinalis L., and Cymbopogon citratus (DC.) Stapf.
against 2nd and 4th instars of Spodoptera littoralis
larvae at different time intervals and under laboratory conditions was assessed
compared with Indoxcarb. Of the tested essential oils, B. carterii BCEO
and M. officinalis MOEO were the most potent after 3 and 5 days of
treatments with LC50 values (287.68 and 457.84 µg/ml) and (151.31
and 266.03µg/ml), respectively, against 2nd instar larvae, while
against 4th instar larvae MOEO recorded the highest toxicity
followed by BCEO after 3 and 5 days of treatments and LC50
values were (650.32 and 1239.01 µg/ml) and (132.94 and 306.09 µg/ml), respectively. The GC-MS
technique was used to perform qualitative and quantitative phytochemical analyses.
B. carterii BCEO riches with n-Octyl acetate (37.95%),
E-Nerolidol (27.40%), Incensole (9.56%), and Isoincensole (4.30%), while M.
officinalis MOEO riches with (-)-Spathulenol (23.94%), Caryophyllene oxide
(19.09%), and β-Curcumene (10.63%). The effect of the promising essential oils
(BCEO and MOEO) on some key enzymes was studied. A significant inhibition in
the activity of glutathione S-transferase (GST) was observed by BCEO (47.58%)
and MOEO (30.67%) in comparison to the control; also, MOEO recorded a
significant inhibition on AChE activity of57.28%. Histological studies on the
midgut revealed that BCEO and MOEO caused basement membrane separation,
degeneration, and loss of some epithelial cell lining. The presented data
announces the potential of designing two eco-friendly green insecticides from
plant-derived essential oils.
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Pages:155-164
How to cite this article:
Mohamed E Mostafa, Nabil M Ghanim, Wessam Z Aziz, Hanan Alfy "Toxicological, chemical profiling, biochemical, and histological impacts of some selected essential oils against <i>Spodoptera littoralis</i> (Boisd.) (Lepidoptera: Noctuidae)". International Journal of Entomology Research, Vol 10, Issue 4, 2025, Pages 155-164
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