State Key Laboratory for Biology of Plant Diseases and Insect Pests of Plant Protection Academy of Agricultural Sciences 100193.R.China;
Keshan Branch of Heilongjiang Academy of Agricultural Sciences 161005.R.China;
College of Agronomy and Biotechnology Normal University of Science&Technology 066004.R.China;
TOMATO; VIROID; simultaneous detection; molecular hybridization; pospiviroids;