Dave, The TMV study was because myself and about 30 others felt that you implied that smokers and only smokers caused/spread TMV. After your statement I had about 30 private mails ranging from: "No one around here smokes, and to the best of my knowledge tobacco is not grown in this state. I have TMV, do you know why " TO "We have smoked for 3 generations, we have never had TMV" For seed diseases I had 1. Bacterial Spot. 2. Anthracnose 3. Phytophthora Stem rot. 4. Cercospora Leaf spot. All of which even a novice gardener should be able to distinguish from TMV I had plants from 3 other sources in the same area, without those diseases. Certifications All I asked was to print in your catalog or URL whether or not the seeds you sell have tested for, or treated for seed borne diseases. Byron