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Biochemical Changes in Spodoptera Frugiperda (J.E. Smith) Larvae Response to Zinc Stress
Document Type : Original Article
Author
Insect Population Toxicology Department, Central Agricultural Pesticides Laboratory, Agriculture Research Center, 12618, Giza, Egypt
Abstract
This study sought to determine the efficacy of metal salt (ZnSO4) against S. frugiperda. Zn caused an extension in larval development time, and caused a shortening in the life spans of both females’ and males’ at all concentrations. Additionally, several body malformations were observed throughout the life cycle of the insect. The fecundity of the females was greatly affected, with 1045.11, 900.01, 838.58,738.58, and 619.34 eggs/female, for 150, 300, 450, 600, and 750 ppm of Zn, respectively, compared to the control of 1210.11 eggs/female. Notably, Zn caused a significant decrease in protein and glycogen levels. The activities of α-amylase, protease, and lipase were also decreased compared with the control. Conversely, SOD and CAT activities significantly increased at all concentrations of Zn. It was determined that the effects of Zn intensified depending on the increase in concentration.
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Articles in Press, Accepted Manuscript
Available Online from 11 December 2025
- Receive Date 24 September 2025
- Revise Date 31 October 2025
- Accept Date 02 December 2025
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