Abstract
This paper reports on the stability of a cytoplsmic-polyhedrosis virus (CPV) of the silkworm to chemicals in order to obtain suitable chemicals and their concentrations for purification of CPV. A CPV readily lost its infectivity by chloroform and chloroform-n-butanol (1:1), but was not affected by treatment with 1×10-1, 1×10-2 and 1×10-3M ethylenediaminetera-acetic acid (EDTA), 5, 10, 20 and 40% carbon tetrachloride, and 1M magnesium chloride at 50°C for 60 minutes, respectively. No difference in the response to chemicals was observed between two strains of CPV, i, e, the hexagonal polyhedron and tetragonal types.
