Publications by authors named "S Mekchay"
Insect pests represent a major threat to human health and agricultural production. With a current over-dependence on chemical insecticides in the control of insect pests, leading to increased chemical resistance in target organisms, as well as side effects on nontarget organisms, the wider environment, and human health, finding alternative solutions is paramount. The employment of entomopathogenic fungi is one such potential avenue in the pursuit of greener, more target-specific methods of insect pest control.
View Article and Find Full Text PDFThe present study aims to evaluate the different nanoparticles (Cu NPs, KI NPs, Ag NPs, Bd NPs, and Gv NPs) against 4th instar larvae as well as the microbial toxicity, phytotoxicity, and soil pH. Nanoparticles were tested at three concentrations (1000, 10000, and 100000 ppm) using two methods (food dip and larvae dip) against larvae. Results (from the larval dip method) showed that among the nanoparticles, the KI NPs caused 63%, 98%, and 98% mortality within 5 days in the treatment of 1000, 10000, and 100000 ppm, respectively.
View Article and Find Full Text PDFEmodin, a compound isolated from Aspergillus terreus, was studied using chromatographic and spectroscopic methods and compound purity (96%) was assessed by TLC. Furthermore, high larvicidal activity against Aedes aegypti-AeA (LC 6.156 and LC 12.
View Article and Find Full Text PDFThis study aimed to synthesize and evaluate the efficacy of CuO NPs (copper oxide nanoparticles) with varying test concentrations (10−500 ppm) against larvicidal, antifeedant, immunological, and enzymatic activities against larvae of S. frugiperda at 24 h of treatment. Copper nanoparticles were characterized by using a scanning electron microscope (SEM) and energy dispersive X-ray (EDaX) analysis.
View Article and Find Full Text PDFToxicity of Metarhizium flavoviride conidia virulence against Spodoptera litura (Lepidoptera: Noctuidae) and its impact on physiological and biochemical activities.
Sci Rep
October 2022
Article Synopsis
- Insect pests like Spodoptera litura develop immunity to fungal infections through various immune responses, but the exact biochemical processes involved are unclear.
- Our research shows that after exposure to the fungus Metarhizium flavoviride, antioxidant enzyme levels in S. litura change significantly, with a decrease in certain immune markers and an increase in detoxifying enzymes.
- M. flavoviride is harmful to S. litura larvae and may serve as an effective, environmentally friendly alternative for controlling this pest compared to synthetic pesticides.