Suppression effect of biological control strain to TMV and PVY

The suppression effect of Bacillus amyloliquefacien Ba33 against TMV and PVY by biological detect through necrotic lesions host and RNA detect through RT-PCR was studied. The result showed that the suppression ratio of necrotic lesions against TMV and PVY was 95.25% and 99.22% respectively. And Ba33 could suppression RNA replication of TMV and PVY in Nicotiana tabacum var. NC89 leaves from 24 to 84h after inoculation virus through RT-PCR detect method.