Predictors for forecasting mango (Mangifera indica) malformation.
Chakrabarti D. K., Kumar R., Kumar S.
Author Affiliation: Narendra Deva University of Agriculture and Technology, Faizabad, Uttar Pradesh 224 229, India.
Indian Journal of Agricultural Sciences 73 : 633-635
Abstract : An attempt was carried out during 1996-98 to identify predictors for forecasting the incidence of floral malformation induced by Fusarium moniliforme var. subglutinans [Gibberella fujikuroi var. subglutinans] on mango (Mangifera indica) cv. Chausa under agroclimatic condition of Rudauli-Sohawal mango belt of Uttar Pradesh, India by regression analysis. In 23 plants content of micronutrients (zinc, copper and magnesium), C:N ratio, mangiferin and auxin and population of F. moniliforme var. subglutinans prior to flowering were estimated in addition to vegetative malformation and total panicles. The nature of correlation of mangiferin, zinc, copper and F. moniliforme with the incidence of malformation varied. Auxin, manganese, C:N ratio and total panicles consistently showed negative, while iron showed positive correlation with the disease incidence. But values of correlation coefficients were not always at significant level. Consistent significant correlation was obtained only with the vegetative malformation parameter. A linear equation for prediction (Y=2.1364 + 0.6968 X, where Y and X were number of malformed shoots and panicles respectively) were developed and validated by chi-square test (?2=3.0434).