Sajeewani, M.K.T.De Silva, R.S.Y.Marambe, B.2020-12-072020-12-072000Annals of the Sri Lanka Department of Agriculture, 2:p.269-275https://dl-doa.nsf.gov.lk/handle/1/2939PLANT PROTECTIONCirsium arvenseOxybaphus nyctagineusPlant QuarantineWeedsWeed seeds found in seed lots imported into Sri LankaArticle