Refugia in BT Cotton

As per the recommendation of the Genetic Engineering Approval Committee (G.E.A.C.) of the Government of India, the total B.T. 20 percent of the area or 5 rows of non-BT of the same variety around the main crop. Planting Non-BT seed (Refugia) is very important.
Every BT variety has non-BT seeds (120 gm seeds) or Pigeon Pea seed comes with the same packet.
BT variety plants contain the genes of a Bacillus thuringiensis, which produces a toxic protein. Due to this, they develop the ability to protect against bollworm insects.
The infestation of bollworm insects is limited to them, and their control is easy here.
If the Refugia is not applied, the resistance of bollworm insects may develop, in which case the BT varieties will no longer make sense.