The crop cotton is very in plant of leave their structures are different and they are growing and suddenly and they are not growing properly and the disease what is this disease

I agree with pawar ji. it isIndian Cotton Jassid infestation. kindly refer plantix library for more information and description and management. since jassids are sucking insects spray imidacloprid or fipronil or lambda cyhalothrin or monocrotophos or acephate

thanks pawar ji for your upvote.