on larvicidal activity of weed extracts against
S. Kandagal??and Mahadev C.
of Zoology, TGP Science College, Jamkhandi-587 301, India
Residue Testing and Quality Analysis Laboratory, University of Agricultural
Sciences, Dharwad-580 005, India
Author email : email@example.com
05 May 2011
29 December 2011
17 March 2012
activity of various concentrations of crude aqueous leaf extracts of E.
triplinerve were studied against S. litura following the
treatment on fourth instar larvae. The results of the total percent mortality
(from fourth instar to adult) demonstrated that the mortality rate
progressively increased (41.42, 58.57, 69.80, 84.49, 86.77, 90.55, 91.30,
90.54) as the extract concentrations increased (1, 2, 3, 5, 7.5, 12.5, 15,
17.5%). The maximum of 92 % total mortality was observed at 15 %
concentration of the extract. It was significant to note that the percent
mortality observed from 5 % onwards was more than 85 %. Results of adult
emergence inhibition indicated that the EI50?of E triplinerve was more effective at 4.07 %.
Interestingly the calculated EI90?value
was 14.10 %. This is an ideal eco-friendly approach for the control of
agricultural pest, S. litura.
triplinerve, Larvicidal activity, Spodoptera litura, Weed extracts,
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