Author(s):

Tirthankar Dalui, Subrata Debnath, Kalyan Chakraborti

Abstract: A study was conducted in several mango producing areas in the districts of Malda, Murshidabad, Nadia and Midnapur in West Bengal during the month of April to June, 2013 to observe the infestation of fruit borer Autocharis albizonalis in eight folk varieties of mango (Mangifera indica L). Frequent observations on incidence of fruit borers showed that the larvae of fruit borer completed their larval stage within the fruit and damage to grown up fruits during this period. The borer caused substantial damage when the fruits were medium to full grown size. During the observation the physiochemical analysis of the mango varieties mentioned, were also analyzed in the laboratory. From the study, it is found that the different physiochemical parameter like TSS, total sugar, reducing sugar and acidity of different mango varieties is changed throughout the developmental period of a mango fruit. From the study it was found that the average infestations of fruit borer in the folk varieties are continuously higher after fruit set. It was also analysed that the susceptibility of the fruit borer attack increases with the decreases of acid content of the mango fruit. Therefore, it is revealed that the fruit borer attack is in peak when the acid content of the fruit is at low level.

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