Ovicidal effect of Cuprasol and Parasan-one in different races of silkworm Bombyx mori

Abstract

Effects of Cuprasol (88 percent copper oxychioride) and Parasan-One (Phenyl mercury acetate 1 percent Hg) on the silkworm eggs have been studied. Fresh eggs of six races of Bombyx mori, namely Pure Mysore, Hosa Mysore, C. nichi, NB18, NB4D2 and Kalimpong-A were soaked in 50, 100, 200 and 400 ppm of each of these fungicides for 30 minutes, to test their effects on hatchability of eggs. Pure Mysore, Hosa Mysore and NB4D2 races were highly sensitive to Cuprasol whereas NB4D2 and NB18 were sensitive to Parasan-One.