1Department of Vegetable and Spice Crops, Uttar Banga Krishi Viswavidyalaya, Pundibari, Coochbehar, West Bengal 736165
2Regional Research Station Terai zone, Uttar Banga Krishi Viswavidyalaya, Pundibari, 743165
*Corresponding author's present address: Department of Spices and Plantation Crops, BCKV, Mohanpur, Nadia, 741 252; E-mail: suichanddatta@rediffmail.com