Abstract
1Department of Plant Pathology, Cook College, Rutgers University, New Brunswick, New Jersey 08903
2Insect Pathology Laboratory, Plant Protection Institute. U.S. Department of Agriculture, Beltsville, Maryland 20705
3Mycoplasma Section. Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, Frederick, Maryland 21701
4Department of Anatomical Sciences, State University of New York, Stony Brook, New York 11794
5Department of Plant Protection, Nanjing Agricultural University, Nanjing, People's Republic of China