Author(s):

Mainak Bhattacharyya

Abstract: Mango red banded caterpillar is a very recently emerged pest of mango which was once a minor pest but it gained a major pest status very recently due to injudicious application of broad spectrum pesticides and global climatic changes. The research study on this pest was carried in the Regional Research Station, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal to record the incidence pattern of this pest at different stages of fruit development. Eight cultivars were selected to observe the varietal preference of this borer pest on the basis of total free amino acid content of the pulp and seed at different stages of fruit development of mango cultivars. It was observed that the highest percentage of infestation was seen in Himsagar (10.45%) where the total free amino acid content in the pulp and seed at the egg stage were 0.045 mg/kg and 0.167 mg/kg respectively. Also amino acid content in the pulp at marble stage was 0.187 mg/kg. While at the maturity stage the total free amino acid content in the pulp and seed were 0.030 mg/kg and 0.093 mg/kg respectively. The least percent infestation of the borer pest was seen in Mallika (2.29%) where the total free amino acid content in the pulp at the marble stage was 1.032 mg/kg. However, the amino acid content of the pulp and seed at egg stage were 0.450 mg/kg and 0.123 mg/kg respectively and that in the maturity stage were 0.133 mg/kg and 0.50 mg/kg respectively. The correlation study of the fruit borer infestation with free amino acid content of pulp and seed at all three stages were non significant and negatively correlated at different stages of development.

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