Madras Agricultural Journal
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Research Article | Open Access | Peer Review

SCREENING OF INSECTICIDES AGAINST THE NYMPHS AND ADULTS OF NILAPARVATA LUGENS STAL, THE RICE BROWN PLANTHOPPER

Volume : 70
Issue: Sep-sep
Pages: 595 - 602
Published: September 28, 2023
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Abstract


Twelve commercial insecticides in emulsifiable concentrates and wettable powder forms at four concentrations Viz., 0.025. 0 05. 0.075 and 0.10% a.i were evaluated in bioassay studies against adults and nymphs of brown planthopper (BPH) separately. Diaz- inon 0,05% .l concentration was taken as standard The efficacy and persistence of all other test insecticides were compared with this standard. Fresh lots of insects were relea- sed/caged periodically to find out the persistent toxicity of respective insecticides Consi- dering the overall persistent toxicity against adults and nymphs based on PT values and overall mean persistent toxicity, chlorpyrifos and carbofuran 0.05% a.l as foliar sprays followed by qujnalphos and monocrotophos are the most effective in the control of 8PH in the field.

DOI
Pages
595 - 602
Creative Commons
Copyright
© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

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