PERTANIKA JOURNAL OF TROPICAL AGRICULTURAL SCIENCE

A new fruit rot of fallen durian a fruit was observed in the Uiversiti Pertanian Malaysia fruit orchard in Serdang, Selangor during the fruit ripening month of October, 1988. The rot was characterized by a dense, white, fan-shaped mat of coarse my celial strands of the causal fungus growing on a water-soaked, brown necrotic patch on the fruit in contact with decaying weed vegetation on the ground. The causal organism was identified as Sclerotium rolfsii. Presence of a thick weed undergrowth and its decaying leaf debris, and warm, moist conditions were shown to be important predisposing factors conducive to the development of the rot.