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AUTHOR(S): Ishwarya M S, Lokesh S
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TITLE Efficacy of Biogenic Synthesised Silver Nanoparticles on Behavioural Changes of Helicoverpa Armigera |
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ABSTRACT The grounds of this study were to utilize the biogenic synthesized silver nanoparticles from Leucas aspera, Cyperus rotundus and Cynodon dactylon for the control of polyphagous pest Helicoverpa armigera. Synthesized silver nanoparticles were subjected for different characterization like XRD, EDX, FTIR and Raman spectroscopy. The bioassays (i.e. larval weight and survival rate) and also its interaction with gut protease activity (trypsin and Chymotrypsin) was evaluated employing LA, CR, and CD AgNPs, as well as crude plant extracts against the 4th instar larvae. The stretching vibration of distinct functional groups of the samples was demonstrated by the existence of FTIR measurements. XRD graphs confirm the AgNPs crystallize in centered cubic phase and the change in peak intensity with different plant extracts was noticed. The body mass, length of the larvae were dramatically lowered by the synthesized sample of silver nanoparticles. They also suppressed the activity of gut proteases (trypsin and chymotrypsin). Our studies could aid in the development of new approaches to address insecticidal resistance in H. armigera. |
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KEYWORDS Helicoverpa armigera, Biosynthesized silver nanoparticles, Leucas aspera, Cynodon dactylon, Cyperus rotundus, Antifeedant, Larvicidal, gut protease |
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Cite this paper Ishwarya M S, Lokesh S. (2022) Efficacy of Biogenic Synthesised Silver Nanoparticles on Behavioural Changes of Helicoverpa Armigera. International Journal of Agricultural Science, 7, 188-204 |
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