Abstract
The effects of a variety of chemicals on the multiplication of cauliflower mosaic virus (CaMV) were investigated by measuring the incorporation rate of 32P into virus particles in infected Brassica perviridis leaves. Treatment with actinomycin D, 5-bromodeoxyuridine, 5-fluorodeoxyuridine and formycin B inhibited the multiplication of CaMV 20 days after inoculation, but not with 2-thiouracil and blasticidin S. The effects of the above chemicals on the multiplication of CaMV are discussed.