1Department of Agricultural Entomology, TNAU, Coimbatore, 641003, Tamil Nadu, India
2Department of Soils and Environment, Agricultural College and Research Institute, Tamil Nadu Agricultural University (TNAU), Madurai, 625104, Tamil Nadu, India
3Department of Biotechnology, Agricultural College and Research Institute, Tamil Nadu Agricultural University (TNAU), Madurai, 625104, Tamil Nadu, India
4Department of Nanoscience and Technology, TNAU, Coimbatore, 641003, Tamil Nadu, India
Department of Agricultural Entomology, Agricultural College and Research Institute, Tamil Nadu Agricultural University (TNAU), Madurai, 625104, Tamil Nadu, India
*Email: mshanthiento@tnau.ac.in (corresponding author)
Online Published on 17 May, 2023.
An ecofriendly colloidal chitosan byproduct synthesized from crude chitosan was evaluated for its chronic toxicity against second instar larvae of Plutella xylostella L. by leaf dip bioassay. The consumption of 10000 ppm colloidal chitosan treated leaf caused 100% mortality after the 4th day, with least larval weight (0.02 mg). Whereas, the consumption of 8000 ppm treated leaves reduced the larval (0.65 mg), pupal (1.26 mg), and adult weights (0.75 mg), with 10% adult malformation and extended larval duration. This is compared to untreated larval duration of 10.66 days. Thus, colloidal chitosan exhibits chronic toxicity and growth inhibition effect on P. xylostella larvae.
Plutella xylostella, Cauliflower, Chitosan, Synthesis, Colloidal chitosan, Glacial acetic acid, Chronic toxicity, Growth inhibition, Malformation, Larval period, Larval weight
