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

Received: 3rd July, 2025; Accepted: 30th September, 2025
 
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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