The degree of resistance/tolerance of ten exotic and geographically distinct cultivars of coconut to root (wilt) disease of unknown etiology was studied at the Regional Agricultural Research Station, KuMarakom, Kerala. All the exotic cultivars tested were found Susceptible to the disease with varying degrees of intensity. However, the coconut culrivar San Ramon recorded significantly lower disease incidence followed by Guam, St. Vincent and Kenya. The infection of leaf rot incited by Bipolaris halodes (Drechsler) Shoem. was also low in these cultivars.