The plain translation of your question is "What is the chemical name of Gum present in pearl millet seed?"

Do you have the images to upload? Also explain briefly how the gum looks like? Generally ergot disease (Claviceps fusiformis, a fungal pathogen) shows the appearance of viscous creamy-pink exudations, called honeydew on the flowering heads which subsequently become hard brown spiky structures called sclerotia.

https://plantvillage.org/topics/pearl...