ABSTRACT

Identification of fungi causing grain discoloration disease at Soc Trang province was carried out at Can Tho University. Infected grain were collected on four rice cultivars and incubated by blotter method. Fungus was identified by Koch?s postulate and based on identification key following Barnett and Hunter 1998; Ou 1985; Mew and Misra 1994; Mew and Gonzales 2002, Watanabe 2002, Pitt and Hocking 2009. Results showed that there were 16 fungal pathogens identified i.e. Fusarium moniliforme, Curvularia lunata, Trichoconis padwickii, Nigrospora sp., Pinatubo oryzae, Acremonium sp., Bipolaris oryzae, Tilletia barclayana, Ustilaginoidea virens, Pithomyces sp., Trichothecium sp., Chaetomium globosum, Pyricularia oryzae, Alternaria sp., Penicillium sp.  and Aspergillus sp. Among them, Fusarium moniliforme. is the most popular fungus, Acremonium sp. and Chaetomium globosum were new recorded in Soc Trang. The occurrence of these fungi on 4 rice cultivars showed that Fusarium moniliforme had highest percentage (49,3%), followed by Curvularia lunata (28,4%), Trichoconis padwickii (24,2%), Nigrospora sp. (16,3%) and Pinatubo oryzae(16,1%), the remaining fungi had low percentage (

Key words: Acremonium sp. Chaetomium globosum, Fusarium moniliforme, grain discoloration.