TMV and SLTMV according to 5 different books that I own is caused by Smokers handeling peppers ot tomatoes. This can be only one thing BURNT nicotine sulphate. If I remember my high school chemistry correctly when you burn something you change the molecular structure of the material. As far as I am concerned RAW TOBACCO (DOES NOT EQUAL) BURNT TOBACCO As far as I am concerned, I have used this for 5 years on 120 peppers and a dozen tomatoes plus the rest of my garden, with no sign of TMV. I also find its the best stuff since DDT was banned. Byron