LABORATORY ESTIMATION OF FIELD-RESISTANCE OF POTATO TO LATE BLIGHT

Based on quantitative measurement of components of field resistance of potatoes to late blight, a multiple linear regression equation is der ived for laboratory estimation of Area Under Disease Progress Curve. T he equation accounts for 82% of variation in Area Under Disease Progre ss Curve. Transformation of data or inclusion of more terms do not imp rove the equation significantly. The method is suggested as a replacem ent or supplement to field testing.