The most common pathogen Golletotrichum gloeosporioides was observed oq eight forest plants which caused spots and blights in different plants. The disease intensity on different host plants* varied; from 4.33 to 62.13 percent. C- gloeosporioides isolate from Cinnamomum zeylanicunt could be able to infect majority of plants tested, while, the isolate of Anacardium occidentale was able to infect only DaXbergia sissoo in addition to its own host. The studies indicated the possibility to physiological specialization of C. gloeosporioides, in Karnataka.