Chemical control of Asystasia intrusa (Bl.), Clidemia hirta (Don.) and Elettariopsis curtisii (Bak.) in rubber and oil palm plantation by C.H. Teoh; P.Y. Toh and H. Khairudin text Ind Preprint : International Coference on Plant Protection in the Tropics 1-4 March 1982 Kuala Lumpur Malaysia No. VI-2. Preprint : International Coference on Plant Protection in the Tropics 1-4 March 1982 Kuala Lumpur Malaysia No. VI-2. RUBBER OIL PALM CHEMICAL CONTROL