I belive most of comercial bulbs are asimptomatic carriers of virus , when this are transmmited to a more susceptible plant the symptoms show.I used a strip once to find a virus in one Iris hybrid, the price is about 8 pounds per test and is a small Zip bag with a net inside, a piece of leave placed inside is grated against the net with a mortar, then add a bit of water and dip the strip, in the Green liquid, if the specific antibodies react with the virus proteins two strips appear , like a pregnancy test, one strip means the kit works but the specific virus is not found( may be others with different proteins) .DNA testing can look for virus too. Enviado desde Yahoo Mail con Android _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…