The induction of pathogenesis-related proteins (PRs) caused by seven virucides for plant was investigated in tobacco (Nicotiana tabacum L ‘Samsun’ NN) and sugar beet (Beta rulgaris L.). The results showed that all of the tested virucides induced the PRs in tobacco and sugar beet, in which one to seven PR proteins were induced. Otherwise, the virucides possessed a varied capability to induce PRs in different plants. It also showed that the virucide with complex component induced more PR proteins (variety and quantity) than the chemical with a single component. It appears to that the capability would contribute to the plant resistance aquired.