In India, the first discovered plant-parasitic nematode was……

✅Explanation: The first plant-parasitic nematode discovered in India was Anguina tritici, the wheat seed gall nematode. This nematode infects the seed heads of wheat and causes the "ear cockle" disease, which results in distorted seeds and yield loss.

🔑Key Points: :
Anguina tritici: This nematode was first reported in India as a serious pest of wheat and is known for causing seed deformation and reducing crop yield. The nematode affects the flower or ear of wheat, which leads to the formation of galls.