Novel Insights into the Phytotoxins Production of Colletotrichum gloeosporioides Causing Anthracnose of Mango

The devasting pathogen Colletotrichum gloeosporioides produced non specific toxic metabolites in culture filtrate. Maximum toxin content was synthesized on 18^th day after inoculation. Drooping and wilting were the striking symptoms observed in most of the plant species tested in culture filtrate but the time taken for expression of symptoms were varied from to plant. Toxigenic culture filtrate inhibited the seed germination of maize, sorghum, tobacco, tomato andchilli drastically. The toxinproved to be thermostable and retained its toxicity even after autoclaving at 1.1kg/cm² pressure for 15 minutes. While, by diluting with water, its toxicity was reduced to a greater extend. The dilution of the culture filtrate and the time taken for symptom expression were positively correlated.