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- Title
GC-MS-MS profiling and toxicity of ethyl acetate extracts of some botanicals against rice weevil, Sitophilus oryzae (L.) in stored maize.
- Authors
ANANDHABHAIRAVI, N.; SHANTHI, M.; VELLAIKUMAR, S.; ARIVARASAN, S.; JAYAPAL, P.
- Abstract
Ethyl acetate extracts of certain botanicals were evaluated in the laboratory for their contact and oral toxicity at 5% concentration against Sitophilus oryzae L. at Natural Pesticide Laboratory, Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai, Tamil Nadu during 2019-21. The result revealed that all the botanicals were effective against S. oryzae compared to the control. Considering the contact toxicity, 5% ethyl acetate extract of Mentha spicata (86.67%) performed better 72 h after treatment. Vitex negundo and Ocimum sanctum caused (83.33%) mortality 72 h after treatment concerning oral toxicity. Mentha spicata caused 93.33% mortality after 15 days of treatment, whereas Vitex negundo, Ocimum sanctum and Tagetes erecta leaf caused 90.00% mortality, which was statistically at par with Mentha spicata. GC-MS-MS study revealed the presence of carvone (38.27%) at the retention time of 7.644, Hexadecanoic acid (2.13%) at the retention time of 27.600, Isopulegol (1.41%) at the retention time of 27.290 and phytochemicals with insecticidal potential in Mentha spicata. Whereas in Ocimum sanctum, Eugenol (59.72%) was the major compound at the retention time of 9.9. Hence, it was concluded that among the tested ethyl acetate extracts, Mentha spicata at 5% was the most effective as a contact and oral toxicant against S. oryzae in stored maize, which possesses the bioactive principle of carvone and it can be developed as an ecofriendly botanical formulation.
- Subjects
MADURAI (India); RICE weevil; ETHYL acetate; SPEARMINT; OCIMUM sanctum; BIOPESTICIDES; PYRICULARIA oryzae
- Publication
Crop Research (0970-4884), 2023, Vol 58, Issue 3/4, p194
- ISSN
0970-4884
- Publication type
Article
- DOI
10.31830/2454-1761.2023.CR-913