NGHIÊN CỨU NẤM PHYTOPHTHORA GÂY BỆNH LOÉT SỌC MẶT CẠO CAO SU TẠI VÙNG TÂY BẮC VÀ BẮC TRUNG BỘ

Two species P. palmivora and P. colocasiase were isolated from disease samples of black stripe of the tapping panel on rubber in North of Vietnam. P. palmivora is main agent and distribution at three rubber regions like Phu Tho, Thanh Hoa and Nghe An. P. colocasiae appear only at Phu Tho. Morphology character of these species were particular described. Cardinal temperatures for growth of these species were: 150C, 300C and 350C. On CMA medium the fungus growth fastest. Sporangia were produced rapidly and abundantly on PCA medium.