A New Leaf Spot Disease of Amomum dealbatum Caused by Colletotrichum musae

摘要

The genus Amomum belongs to the family Zingiberaceae and consists of 150 species world over. In India, there are 22 species with 10 endemics. A few of them are important spices of commerce. A. subulatum Roxb. commonly known as large cardamom is widelycultivated in Sikkim and Darjeeling. A germplasm of large cardamom including allied species and genera are maintained at ICR! Research farm at Pangthang (2160 m above MSL) East Sikkim. During routine surveys in May 2010, we detected that a few plants ofA. dealbatum Roxb. were affected by leaf spots. Initially the spots were minute in size, brownish in colour and found enlarging to 2 - 3 cm in diameter. The spots were irregular to round in shape (Fig. la-c).