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以ＴＭＶ－ｏｍ为对照，测定了辣椒上５个烟草花叶病毒分离物Ｐ－９、Ｐ－３８、Ｐ－４４、Ｐ－７１、ＴＭＶ－ｗｙｍ在４２个辣椒品种、品系上的致病反应，结果表明这５个分离物对辣椒的致病性存在明显差异：Ｐ－７１、ＴＭＶ－ｗｙｍ＞Ｐ－９＞Ｐ－３８、Ｐ－４４；对接种过５个ＴＭＶ分离物的辣椒（四平头）进行过氧化物酶（ＰＯＤ）和酯酶（ＥＳＴ）同工酶分析，结果表明辣椒上５个ＴＭＶ分离物引起的酶活性有差异：导致ＰＯＤ上活性强弱为ＴＭＶ－ｗｙｍ＞Ｐ－９、Ｐ－３８＞Ｐ－４４、Ｐ－７１；引起ＥＳＴ活性强弱为Ｐ－３８＞ＴＭＶ－ｗｙｍ、Ｐ－４４＞Ｐ－７１＞Ｐ－９。说明北疆地区辣椒上ＴＭＶ存在着分化。
TMV-om was used as a control to determine the pathogenic responses of five tobacco mosaic virus isolates P-9, P-38, P-44, P-71 and TMV-wym in 42 capsicum cultivars The results showed that there were significant differences in the pathogenicity of the five isolates against pepper: P-71, TMV-wym> P-9> P-38 and P-44; (POD) and esterase (EST) isozymes. The results showed that the five TMV isolates in pepper caused different enzyme activities: the activity of POD and TME was TMV-wym> P- 9, P-38> P-44 and P-71. The EST activity was P-38> TMV-wym, P-44> P-71> P-9. It shows that there is differentiation of TMV in pepper in northern area.