1Department of Entomology, G B Pant University of Agriculture and Technology, Pantnagar, 263145, Uttarakhand, India
2Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
3Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
*Email: moorthyagri96@gmail.com (corresponding author): ORCID ID 0000-0001-7657-6899
Online published on 4 April, 2025.
Colloidal chitin is a natural compound shown to have antifeedant activity against insects. In this study, the antifeedant activity of colloidal chitin was investigated against the first instar larva of Spodopterafrugiperda (J E Smith). The results showed that colloidal chitin had antifeedant activity, with the highest activity observed at 7% concentration. The antifeedant effect was enhanced with increase in concentration and also with increase in time after treatment. Specifically, colloidal chitin 7% showed 90.43% antifeedant effect after 72 hr of treatment, followed by 87.43 and 81.76% after 48 hr and 24 hr of treatment, respectively. The results suggest that colloidal chitin could be a potential candidate for use as an insect repellent or pesticide.
Colloidal chitin, Marine waste, Spodoptera frugiperda, Synthesis, Standardization, FTIR, Antifeedant, Ecofriendly, Deacetylation, Solubility, β-glucosidic bonds, Concentration, Time
