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VOL. 11, ISSUE 2 (2026)
Efficacy of plant extracts of Zanthoxylum armatum as larvicidal agent against Spodoptera litura larvae
Authors
Nidhi Bora, Dr. Niharika Singh Bisht, Dr. B R Kaushal
Abstract
The need of plant-based
insecticides is increasing day by day because of resistance acquired by
lepidopteran pests against synthetic pesticides. Considering this, larvicidal
activity was tested with leaf extracts of Zanthoxylum armatum extracted
with hexane and methanol against 3rd, 4th and 5th
larval instars of Spodoptera litura. The plant extracts were prepared by
maceration technique. The concentration of methanolic extract was 735.09g/L
while that of hexane extract was 806.45g/L. Mortality rates were assessed on
the basis of knock down toxicity i.e., KD0, KD50 and KD100.
Results demonstrated that KD100 for 5th larval instars
was 7+0.5 days for both hexane and methanol extracts of Z. armatum.
Greater larvicidal effects against 4th larval instars were shown by
methanolic extracts where KD50 was recorded to be only 3 days. The
study reports that the leaf extracts from Z. armatum can be a potential
source of bio- pesticide against S. litura.
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Pages:123-126
How to cite this article:
Nidhi Bora, Dr. Niharika Singh Bisht, Dr. B R Kaushal "Efficacy of plant extracts of <i>Zanthoxylum armatum</i> as larvicidal agent against <i>Spodoptera litura</i> larvae". International Journal of Entomology Research, Vol 11, Issue 2, 2026, Pages 123-126
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