The percentage frequency and contribution of leaf surface mycoflora of conventional and organic cotton field was observed fortnightly with the help of gravity petriplate method. For mycofloral study 15common, dominant and pathogenic fungi were taken. The Fungi viz. Alternaria alternate, Alternaria macrospora, Aspergillus flavus, Aspergillus niger, Cercospora gossypina, Colletotrichum gossypii, Curvularia lunata, Drechslera tetramera, Helminthosporium gossypii, Penicillium notatum, Penicillium chrysogenum, Rhizoctonia solani, Stemphylium solani, Rhizopus oryzae, Trichoderma harzianum, Trichoderma viridewere reported. The result shows that fungal occurrence is higher with the age of cotton plant than that conventional cotton field. If total fungal pathogen population higher in organic cotton with the age of cotton plant fungal pathogen also increase specially in conventional cotton field. It was reported that Alternaria spp, Penicillium spp and Aspergillus were the most common fungi in all the months on both the epidermises of all the plants.