00514nam a2200109 a 450000100080000000500110000800800410001910000240006024500530008426000260013752002410016316420791998-10-14       1977    bl uuuu      00u1 u    #d1 aRAYCHAUDHURI, S. P.  aVirus and mycoplasma diseases of plants in India  aNew Delhi: 1977c1977  aViruses are among the most serious pestilences affecting mankind directly and indirectly. Small pox existed as early as 1700 B.C. Plant viruses, however, were discovered much latr. In recent years they have assumed enormous proportions.