Abstract
Pectolinaringenin was isolated from chloroform extract of Clerodendrum phlomidis L. and was evaluated at 12.5 to 100 ppm concentrations for its effects on total protein, esterase and glutathione S-transferase (GST) activities of Earias vittella and Helicoverpa armigera. At 100 ppm, the compound reduced total protein content by 55.75% and 53.01% over control with IC50 values of 74.37 and 212.31 ppm in E. vittella and H. armigera, respectively. At 100 ppm it also reduced GST and esterase enzyme activities in E. vittella by 37.53% and 43.09% over control, with IC50 values of 133.00 and 111.76 ppm, respectively. It also reduced GST and esterase activities in H. armigera by 43.14% and 47.421% over control with IC50 values of 114.38 and 98.78 ppm, respectively. Data were analyzed for their normality using the Shapiro-Wilk test and Levene’s statistics to determine the significant deviation. Pectolinaringenin could be used for the management of agricultural pests.
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