BIOEFFICACY OF ANDROGRAPHIS PANICULATA (BURM.F.) NEES AGAINST ROOT-KNOT NEMATODE, MELOIDOGYNE INCOGNITA (KOFOID AND WHITE) CHITWOOD IN OKRA - ATHIRA ANIL 2022; Dr. NISHA M.S (COLLEGE OFAGRICULTURE VELLAYANI DEPARTMENT OF NEMATOLOGY, 2022)