Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5511593 | International Journal of Biological Macromolecules | 2017 | 23 Pages |
Abstract
A nanopesticide formulation was developed using chitosan and a botanical pesticide PONNEEM® and its antifeedant, larvicidal and growth regulating activities were screened against Helicoverpa armigera, a major lepidopteran pest. Chitosan nanoparticles (CSNs) were prepared by using two different cross-linking agents namely glutaraldehyde (GLA) and tripolyphosphate (TPP). The effects of cross linking agents on CSNs and the biological properties against the insect pest were also studied. Cross linking of chitosan with either TPP or GLA was confirmed through Fourier Transform Infrared (FTIR) spectroscopy. Electron micrograph revealed that the size of CSNs varied from 32 to 90Â nm. The stability of nanoparticles lasted for 9Â days in CSNs-TPP-PONNEEM. In CSNs-GLA-PONNEEM, the stability of nanoparticles was higher. CSNs-TPP-PONNEEM treatment recorded 88.5% antifeedant activity and 90.2% larvicidal activity against H. armigera. Weights of H. armigera pupae in CSNs-TPP-PONNEEM treatment were significantly low. Chitosan-based nano-pesticide formulation holds great promise in H. armigera management.
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Authors
Michael Gabriel Paulraj, Savarimuthu Ignacimuthu, Munusamy Rajiv Gandhi, Azeez Shajahan, Pathalam Ganesan, Soosaimanickam Maria Packiam, Naif Abdhullah Al-Dhabi,