Full Text                                                                            Full-Text Online link not available        A new record of Phytophthora ramorum causing leaf fall and shoot rot of nutmeg (Myristica fragrans). Journal of Mycology and Plant Pathology ;  2012  [Vol.4]  Pages:- Abstract Severe defoliation of green leaves of nutmeg (Myristica fragrans) was observed in major nutmeg growing areas of Thrissur, Emakulam, Idukki and Kottayam districts of Kerala, India, during the southwest monsoon period of 2011. Infection was observed on leaves, shoots and fruits. Symptoms first appeared as dark brown water-soaked lesions on the midrib of the leaves which enlarged and spread along the lateral veins to leaf lamina resulting in blighting. Petioles of the infected leaves showed black discoloration. On young shoots, black lesions were observed which enlarged in size resulting in rotting and drying up of shoots from the tip downwards. Leaf and stem infections resulted in extensive defoliation. The causal organism was identified as Phytophthora ramorum based on cultural, pathogenicity and morphological analyses. This is thought to be the first report of P. ramorum causing leaf fall and shoot rot of nutmeg. Keywords