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VOL. 9, ISSUE 5 (2024)
Evaluation of aqueous and methanol extract of Pongamia pinnata (L.) Pierre against Yellow Tea Thrips, Scirtothrips dorsalis hood (Thysanoptera: Thripidae) on tea
Authors
Chayanika Chetia, Azizur Rahman, Pavitra Chutia
Abstract
In this study, aqueous and methanol extract of
Pongamia pinnata seeds were evaluated against adults of Scirtothrips
dorsalis on tea. The mortality rate was tested in the concentration range
of 1%, 2%, 4%, 6%, 8% and 10% at the time interval of 24 hour (h), 48 h, 72 h
and 96 h. The lethal concentration 50 (LC50) was calculated after 24
h of treatment by probit analysis. In both aqueous and methanol extract
percentage mortality increased with increased concentration and time. At 96 h
of treatment, aqueous extract exhibited 95.65% mortality and methanol extract
exhibited 100% mortality at 10% concentration. LC50 values were
6.70% and 3.11% in aqueous and methanol extract, respectively. From this study,
it is concluded that Pongamia pinnata seed is having active principle
which is responsible for controlling Scirtothrips dorsalis.
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Pages:61-63
How to cite this article:
Chayanika Chetia, Azizur Rahman, Pavitra Chutia "Evaluation of aqueous and methanol extract of <i>Pongamia pinnata</i> (L.) Pierre against Yellow Tea Thrips,<i> Scirtothrips dorsalis</i> hood (Thysanoptera: Thripidae) on tea". International Journal of Entomology Research, Vol 9, Issue 5, 2024, Pages 61-63
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