ARCHIVES
VOL. 8, ISSUE 1 (2026)
Effects of specific insecticides on biological functions and histological changes of the fall armyworm, Spodoptera frugiperda (J. E. Smith)
Authors
Mohamed R G Abo Elela, Salem M S, Antonous M Mekhael, Ali R El-Gabaly
Abstract
The aim of this study investigated the
effectiveness of Lufenuron (Cymex 5% EC), diflubenzuron (Dimilin 48% SC),
Emamectin benzoate (Pasha 1.9% EC) and Indoxacarb (Strong 30% SC) on the second
and fourth larval instar of the fall armyworm. Cymex 5% EC was the most
effective insecticide against S. frugiperda larvae, resulting in the
shortest larval, pupal, and adult durations of 12.27, 11.81, and 7.34 days
compared to control 15.34, 13.39, and 9.96 days respectively. Also, the current
study examined lufenuron's insecticidal effect and caused the following
results, the percentages of adult emergence (64.8%), pupation (25.1%), and
larval mortality (91%). All treatments' tested dose levels revealed significant
histopathological disturbances in the insect midgut, including muscle layer
destruction, epithelial cell breakdown, peritrophic membrane separation,
basement membrane detachment, and the emergence of vacuolations. In addition,
the tested insecticides, especially Lufenuron, act as potent physiological
disruptors, interfering with the insect hormonal balance, digestive efficiency,
impaired developmental rates and histopathological damage. These findings may
help to explain why treated larvae died at higher rates than control.
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Pages:94-103
How to cite this article:
Mohamed R G Abo Elela, Salem M S, Antonous M Mekhael, Ali R El-Gabaly "Effects of specific insecticides on biological functions and histological changes of the fall armyworm, <i>Spodoptera frugiperda</i> (J. E. Smith)". International Journal of Agriculture and Plant Science, Vol 8, Issue 1, 2026, Pages 94-103
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