Brood Lac is the mature form of lac that contains live lac insect larvae (Kerria lacca) used to start new lac crops. It consists of resin-coated twigs harvested at a stage when insects are alive and ready to reproduce. These brood-bearing sticks are tied onto fresh branches of host trees such as Palash, Ber, or Kusum, where young insects migrate and begin secreting resin. Brood Lac serves as the seed material for lac cultivation, ensuring continuous production. Its quality and timing of use directly affect yield, making it vital for sustaining Indias traditional, eco-friendly lac industry and rural livelihoods.