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Bioactivity of Brown Algal Seaweed, Turbinaria ornata (Turner) J. Agardh in Combination with Pungam Oil against Spodoptera litura (Fab.)

Department of Entomology, Faculty of Agriculture, Annamalai University, Annamalai Nagar, Chidambaram-608 002
(Tamil Nadu), India
*(e-mail:; Mobile : 90806 75324)
(Received: July 22, 2022; Accepted: September 3, 2022)


The combined action of the solvent extract of brown algal seaweed, Turbinaria ornata with Pungam oil at
3 and 5% at various concentrations viz., 2, 4, 6, 8, 10 and 20% along with standard check was investigated
against Spodoptera litura for their effectiveness on larval mortality, pupation, pupal malformation, adult
emergence and pupa to adult conversion ratio under controlled condition during 2021-22 in Department
of Entomology, Faculty of Agriculture, Annamalai University. In comparison with Pungam oil at 3%
alone, combination effect of T. ornata (20%)+Pungam oil 5% showed the maximum larval fatality (80.00%),
reduction in pupation (20.00%), adult emergence (13.33%) and pupal to adult conversion ratio (1 : 0.66)
compared to standard check. Pungam oil addition supplemented the toxicity effect of brown algal seaweed
and demonstrated critical reduction in the population of test insects.
Key words : Brown algae, Turbinaria ornata, Pungam oil, Spodoptera litura, maximum larval fatality