Bio-efficacy of Botanicals and Biopesticides against Rice Caseworm, Parapoynx stagnalis (Zeller)
Muhammed Arshad V1*, Karthikeyan K2, Haseena Bhaskar1, Mani Chellappan1 and Sajitha Vijayan M1
1 Department of Agricultural Entomology, College of Agriculture, Vellanikkara, Kerala Agricultural University, KAU P.O., Thrissur, Kerala, India 680656
2 Department of Agricultural Entomology, Regional Agricultural Research Station, Pattambi, Kerala Agricultural University, P.O., Mele Pattambi, Palakkad, India 679306
*Corresponding author Email: arshadmuhammed345@gmail.com
Volume 18-(2), 2025 ; https://doi.org/10.58297/SDTR3063 Click here for Pdf
Abstract
The experiment was conducted in order to find the efficacy of eco-friendly insecticides against rice caseworm, Parapoynx stagnalis. The efficacy of three de-oiled botanical cakes viz., neem cake (2 and 3 %), mahua cake (2 and 3 %), and castor cake (2 and 3 %), as well as two biopesticides viz., Bacillus thuringiensis (1 ml L-1) and Beauveria bassiana (20 ml L-1) were evaluated under net house condition at Regional Agricultural Research Station, Pattambi during September 2023. The mortality and feeding were recorded at 1, 3, 5 and 7 days after treatment. The results showed that 100 per cent larval mortality was recorded on the 3rd day with mahua cake (3 %) treatment recorded followed by mahua cake (2 %) and B. thuringiensis. The treatments could also significantly reduce the feeding damage by 3rd day @ 7.73,13.67 and 13.27 % respectively. Neem cake showed significant larval mortality (90 %) of caseworm on the 7th day after treatment at a higher concentration (3%).
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