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AUTHOR(S): Priyanka Sharma, Prem Lal Sharma, Subhash Chander Verma
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ABSTRACT The seven-spotted ladybird beetle, Coccinella septempunctata L. (Coleoptera: Coccinellidae) is a polyphagous destructive predator with cosmopolitan distribution. The present study aimed to study the demographic parameters of C. septempunctata on different instars of potato aphid, Macrosiphum euphorbiae (Thomas) (Homoptera: Aphididae) on tomato crop. The pre-adult period was the longest on second instar which is significantly at par with fourth instar while the shortest on third instar of M. euphorbiae. The population growth parameters like gross reproductive rate (GRR), net reproductive rate (Rₒ), intrinsic rate of increase (r) and true generation time (T) were evaluated. The GRR was highest on third instar while lowest on first instar which is statistically different from each other. C. septempunctata females reared on third instar of M. euphorbiae had the highest fecundity which is statistically different from first and second instar. It was concluded that the C. septempunctata possesses good attributed qualities of biocontrol agent against M. euphorbiae and can be exploited as one of promising biological control agent for the protection of plant against the potato aphid. |
KEYWORDS Coccinella septempunctata, Macrosiphum euphorbiae, Demographic parameters, Life table |
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Cite this paper Priyanka Sharma, Prem Lal Sharma, Subhash Chander Verma. (2023) Demographic Parameters of Coccinella Septempunctata L. Against Macrosiphum Euphorbiae (Thomas) on Tomato. International Journal of Agricultural Science, 8, 135-146 |
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