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VOL. 11, ISSUE 2 (2026)
Comparative bio-efficacy of botanical seed powders against the rice weevil, Sitophilus oryzae (Linnaeus) (Coleoptera: Curculionidae)
Authors
M Kandibane, S Thulasi*, B Madhuvanthi
Abstract
The present study was carried out to evaluate
the comparative bio-efficacy of selected botanical seed powders against the major
stored-product pest, Sitophilus oryzae (L.) (Coleoptera: Curculionidae).
Botanicals tested included Entada rheedii (African dream herb), Abrus
precatorius (rosary pea), Piper nigrum (pepper), Myristica
fragrans (nutmeg), Zingiber officinale (ginger), Allium sativum
(garlic), Capsicum annuum (chilli), Syzygium aromaticum (clove),
and Azadirachta indica (neem). Two independent laboratory bioassays
(Experiment I and II) were conducted during 2022–2023 under controlled
conditions at the Department of Agricultural Entomology, Pandit Jawaharlal
Nehru College of Agriculture and Research Institute (PAJANCOA & RI), Karaikal,
U.T. of Puducherry, India. Significant differences in insecticidal efficacy
were observed among the treatments in both the experiments. Among the
botanicals, black pepper seed powder consistently exhibited superior
bio-efficacy, as evidenced by the highest adult mortality (87.08% and 83.33%),
highest oviposition deterrence (92.16 % and 83.53 %), lowest adult emergence
(2.08 and 4.08), highest inhibition rate (98.94 % and 97.96 %) lowest seed
damage (0.67 % and 1.83 %), lowest weight loss (1.41 % and 2.04 %) and high
feeding deterrent value (97.78 and 96.72), followed by clove ranked second in
efficacy across most parameters. The findings highlight the potential of
botanical seed powders, particularly
P. nigrum, as effective, eco-friendly alternatives to synthetic insecticides for the management of S. oryzae in stored grains.
P. nigrum, as effective, eco-friendly alternatives to synthetic insecticides for the management of S. oryzae in stored grains.
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Pages:51-57
How to cite this article:
M Kandibane, S Thulasi*, B Madhuvanthi "Comparative bio-efficacy of botanical seed powders against the rice weevil, <i>Sitophilus oryzae </i>(Linnaeus) (Coleoptera: Curculionidae)". International Journal of Entomology Research, Vol 11, Issue 2, 2026, Pages 51-57
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