Hi Oliver, I seem to have a problem with long posts, so I will break it up.
All testing so far has been with Critter Creek Labs. I, and sometimes with another person's samples added, started with the cheaper greenhouse screening, only to discover some obvious false negatives, so at some point, we changed over to the double well test. I retested some that I hoped would have been false positives, but no luck, they were still positive. Some statistics: 261 tests made on 234 different plants for CMV and ORSV, and another 10 for BYMV for some oddly acting plants just to see if this was something to be concerned about. Approximately 1/3 of the plants tested positive for one or more of the common viruses, but none for BYMV. The incidence was much higher for plants in my collection for a long time, and lower, but still substantial, for recently purchased plants All four Vanilla plants, 2 planifolia, a pompona, and an unknown Mex. species, were positive for CMV, and the thin fast growing planifolia that I thought was a seedling, was also positive for ORSV. To be continued.... _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
