The effect of topical application 100,300 and 500 $mu$g/ ml with Mineral Salts of magnesium sulphate and potassium nitrate on economic parameters was ana- lyzed following treatment of last larval stadium. The treated larvae showed significantly decreased larval weight and silk gland weight in all the treated groups along with other decreased Iarval, cocoon and adult parameters. The female cocoon weight was significantly decreased in all the treated groups with decreased female cocoon shell weight and male cocoon weight at 300 and 500$mu$g/ml respectively. The length and weight of filament was significantly decreased at 300 and 500 $mu$g/ml respectively and denier at 500 $mu$g/ ml. The fecundity decreased significantly in 300 and 500 $mu$g/ml treated groups when compared with the corresponding parameters of the carrier control.