TY - BOOK AU - ASHA B NAIR AU - Dr. K UMAMAHESWARAN TI - SERODIAGNOSIS AND STANDARDIZATION OF TECHNIQUES FOR PRODUCTION OF VIRUS FREE PLANTING MATERIALS OF CASSAVA VARIETY VELLAYANI HRASWA U1 - J:4 P10 AS 112 PY - 2012/// CY - COLLEGE OF AGRICULTURE VELLAYANI PB - DEPARTMENT OF PLANT PATHOLOGY ER -