STUDIES ON ECONOMIC INJURY LEVEL OF LEGUME POD BORER (Maruca vitrata (G.) Fab.) ON COWPEA (Vigna unguiculata (L.) Walp) IN ZARIA, KADUNA STATE
STUDIES ON ECONOMIC INJURY LEVEL OF LEGUME POD BORER (Maruca vitrata (G.) Fab.) ON COWPEA (Vigna unguiculata (L.)…