Abstract: Guava fruit weight loss owing to anthracnose (Colletotrichum gloebsporioides) severity was estimated on the basis of critical point model. Gradient of fruit anthracnose severity was created through varied levels of fungicide spray. Percent fruit weight loss ranged from 16.4% (Deshi) to 30.4% (Kazipeyara). Percent fruit weight loss was positively correlated with fruit anthracnose level. Regression coefficients in both cases were highly significant.