Arora, AnitaHarinder Singh2019-09-052019-09-052019http://krishikosh.egranth.ac.in/handle/1/5810126534Anthracnose caused by Colletotrichum gloeosporioides is one of the most destructive diseases of mango. During survey it was observed that the disease was prevalent in Gurdaspur, Hoshiarpur and Pathankot districts with highest disease incidence in Pathankot (43.36 %) and lowest in Hoshiarpur (39.22 %). The disease appeared as irregular, dark brown to black necrotic lesions with light centres on mango leaves. The fungus produced septate and hyaline hyphae, which were initially cottony white and become gray in later stages. The conidia were cylindrical or oblong, straight with rounded ends, non-septate with oil droplets having 13.10-16.50 μm length and 3.90-4.30 μm breadth. The acervuli produced in the culture were round to irregular in shape, dark brown to black coloured with dark brown to black, erect setae measuring 60.90-64.30 × 2.50-3.60 μm. All the cultivars had shown susceptible reaction under laboratory and field conditions except the cultivar Malika which was highly susceptible under laboratory conditions. The systemic fungicides azoxystrobin and propiconazole were highly effective in inhibiting the mycelial growth (100%) of pathogen at 100 μl/ml. The ED50 value of azoxystrobin was ˂5 μl/ml and ED90 value ˂25 μl/ml. Mancozeb was the least effective fungicide in inhibiting the mycelial growth (32.89%) of the fungus. The fungicides azoxystrobin and propiconazole were significantly effective in reducing percent disease index and providing disease control at both the locations Ladhowal (Ludhiana) and Gangian (Hoshiarpur). Thiophanate methyl was the next best treatment in reducing percent disease index.ennullThesis