TY - BOOK AU - Jayasuriya , Magdon A.H AU - Gunasena , H.P.M TI - New invasive weed in Sri Lanka: oarthenium hysterophorus L.(asteraceae) U1 - 632.5 CY - Peradeniya PB - Postgraduate Institute of agriculture KW - WEED KW - INVASIVE WEED ER -